ASTM A193 Grade B7 stud bolt chart: thread, tensile stress area, 50 % yield preload (kN), dry-thread torque (Nm) and the ASME B16.5 flange class / NPS pairing for stud sizes 1/2 in through 2-1/2 in. B7 is the default flange stud in the ASME B16.5 / B16.47 range — 4140/4142 alloy-steel, Class 2A UN thread, used with ASTM A194 Grade 2H heavy-hex nuts.
WIKA Type 232.50 (dry) and Type 233.50 (glycerin-filled) 316 SS Bourdon pressure gauge selection chart: pressure range 0–1 bar through 0–1000 bar plus vacuum and compound ranges, digit stepping, EN 837-1 accuracy Class 1.0, preferred model and typical service. Includes rules for the working point (60–75 % of full scale), case sizes (63 / 100 / 160 mm), connection (G 1/4 B to G 1/2 B), when to fill, when to snub.
Pneumatic cylinders are interchangeable between manufacturers when built to the same standard: ISO 15552 (profile and tie-rod cylinders 32–320 mm bore, formerly ISO 6431/VDMA 24562), ISO 21287 (compact cylinders 20–100 mm bore) and ISO 6432 (round mini cylinders 8–25 mm bore). Mounting dimensions, port sizes and piston rod threads are defined by the standard, so a Festo DSBC/ADN, Norgren PRA/RA or SMC C96/CQ2 of the.
Deep groove ball bearings are identified by the ISO designation (6000 extra-light, 6200 light, 6300 medium, 6400 heavy series; the last two digits × 5 give the bore in mm from 04 upwards) and by suffixes: 2RS/2RSH/2RS1 (two rubber contact seals), 2Z/ZZ (two steel shields), open (no seal), C3 (increased radial clearance for higher temperature or interference fits) and E (reinforced). The finder lists the catalogue.
Enclosures are selected by internal or external height × width × depth, ingress protection (IP54/IP55 indoor, IP66/IP69K washdown or outdoor), impact rating IK, material (painted sheet steel, stainless steel 304/316L, polyester GRP, polycarbonate/ABS) and by the mounting plate and door options. The finder lists the catalogue cabinets by dimensions as stated in the manufacturer designation (the order H × W × D is as.
Flanges are matched by nominal size (DN / NPS), pressure rating (PN6, PN10, PN16, PN25, PN40 to EN 1092-1; Class 150, 300, 600 to ASME B16.5), type (type 01 plate/slip-on, type 05 blind, type 11 weld neck, type 02 loose with collar, threaded) and material (carbon steel P250GH/A105, stainless 1.4301/1.4404, A182 F304/F316). Bolt circle, bolt count and hole diameter are fixed by the standard for each DN/PN pair, so.
A cable gland is selected by entry thread (metric M12–M75 to IEC 62444, PG7–PG48, or ½"–2" NPT), the clamping range for the cable outer diameter, the material (polyamide for standard duty, nickel-plated brass or stainless steel for mechanical strength and EMC, with or without armour clamping), the ingress rating (IP66/IP68) and, in hazardous areas, the Ex e or Ex d certification. The finder lists the catalogue.
Heating cables are selected by output per metre (W/m at 230 V), total power and length for constant-wattage two-conductor cables (floor heating 10–17 W/m, outdoor and roof 20–30 W/m), or by output per metre at 10 °C and maximum circuit length for self-regulating cables (pipe frost protection, typically 8–30 W/m). The finder lists the catalogue cables by W/m with length and total power so a replacement of equal.
Hydraulic fittings are matched by thread system and size, and by sealing method: BSPP (G) parallel thread with bonded seal or O-ring, BSPT (R) taper thread sealing on the thread, JIC 37° flare (SAE J514, UN/UNF threads), ORFS O-ring face seal (ISO 8434-3), NPT taper, and metric DIN 2353 / ISO 8434-1 cutting-ring fittings in the L (light) and S (heavy) series sized by tube outside diameter (6L, 8L, 10L, 12L, 15L,.
An O-ring is specified by inside diameter (ID) × cross-section (CS) and by compound: NBR (nitrile, 70 Shore A, −30 to +100 °C, oils and fuels), FKM (fluoroelastomer/Viton, 75 Shore A, −20 to +200 °C, chemicals and high temperature), EPDM (−45 to +150 °C, water, steam, brake fluid — not mineral oil) and silicone (−60 to +200 °C, food and low-temperature service). The finder lists the catalogue O-rings by.
Control-panel power supplies are matched by output voltage (24 V DC is the industrial standard; 12 V and 48 V for special loads), rated output current or power, input (1 × 100–240 V AC, 3 × 400 V AC, or 24 V DC for redundancy), efficiency, and features such as power boost for tripping breakers, redundancy modules and NEC Class 2 limitation. The finder lists the catalogue 24 V supplies by current so an equivalent.
Panel radiators are specified by type (10, 11, 20, 21, 22, 33 — the digits give the number of panels and convector fins), height, length and heat output at the design temperatures (EN 442 at 75/65/20 °C; many Nordic listings quote 70/40/20 °C for low-temperature systems). Ventil (integrated valve) models have the valve insert built in for bottom connection; Compact models connect at the side. The finder lists the.
Radial shaft seals (rotary lip seals) are specified by shaft diameter d1 × housing bore d2 × width b and by design: HMS5 (single lip, rubber outside diameter), HMSA10 (with auxiliary dust lip), CRW1/CRWA1 (metal case, inch and metric), HDS (large diameter, split or solid), and by lip material — NBR (R) for mineral oils to 100 °C, FKM (V) for higher temperature and aggressive media. The finder groups the catalogue by.
Solenoid valves are selected by port thread (G/R ¼" to 2", or NPT), function — NC (normally closed, opens when energised) or NO — operating principle (direct-acting for zero differential pressure and small orifices; servo-operated needing a minimum differential of about 0.1–0.5 bar; assisted-lift for zero to high differential), seal material (NBR, EPDM, FKM, PTFE) against the medium and temperature, and the coil.
Synchronous (timing) belts are specified by tooth profile and pitch, pitch length (mm, or number of teeth) and width: HTD/PowerGrip curvilinear profiles 3M, 5M, 8M, 14M (pitch in mm), GT3/GTX (higher-load curvilinear, same pitches, backward compatible on HTD pulleys), trapezoidal imperial MXL (2.032 mm), XL (5.08), L (9.525), H (12.7), XH (22.225), and metric trapezoidal T2.5, T5, T10, AT5, AT10. The finder lists.
Replacement UV lamps are identified by overall length, tube diameter, base (4-pin single-ended, 2-pin, or double-ended), rated power and technology: low-pressure (253.7 nm, 15–90 W, 9,000 h), low-pressure amalgam (100–800 W, 12,000–16,000 h) and medium-pressure (polychromatic, 400 W to 30 kW, 4,000–10,000 h). The table lists the catalogue lamps by length and wattage across the OEM systems cBallast supplies for, so a.
V-belts are identified by section and effective length: classical sections Z (10 × 6 mm), A (13 × 8), B (17 × 11), C (22 × 14), D (32 × 19) to DIN 2215 with inside length Li, and narrow (wedge) sections SPZ (9.7 × 8), SPA (12.7 × 10), SPB (16.3 × 13), SPC (22 × 18) to DIN 7753 with datum length Ld; raw-edge cogged versions (XPZ/XPA/XPB, AX/BX/CX) run on the same pulleys with higher power rating and smaller minimum.
Taper bushes fix pulleys, sprockets and couplings to a plain shaft without machining the hub: the bush size (1008, 1108, 1210, 1215, 1610, 1615, 2012, 2517, 2525, 3020, 3030, 3535, 4040, 4545, 5050) states the hub bore family and the maximum length, and each size is bored to a range of shaft diameters with a standard keyway (PHF TB 1610 × 25 mm = size 1610, 25 mm bore). QD bushes (SH, SDS, SD, SK, SF, E, F, J, M).
Plain bearings carry load by sliding contact and are chosen by bore, outside diameter and length together with the sliding material. Spherical plain bearings GE..E (steel/steel, requiring lubrication) and GE..ES / GE..ES-2RS (steel/steel with lubrication grooves, sealed) accept misalignment and heavy alternating loads in cylinders, linkages and cranes; the number is the bore in millimetres (GE 100 ES = 100 mm)..
Adapter sleeves mount tapered-bore bearings (suffix K) on plain shafts: the sleeve is drawn into the bearing bore with its lock nut, expanding the bearing onto the shaft. The designation follows the bearing series and bore code (H 209 fits a 2209 K or 1209 K bearing of 45 mm bore on a 40 mm shaft; H 309 the 300 series), HA/HE sleeves are the 3xx/2xx sizes for 22xxx K and 23xxx K spherical roller bearings, OH sleeves.
A V-belt pulley is specified by belt section (SPZ, SPA, SPB, SPC wedge belts; Z, A, B, C, D classical belts; 3V, 5V, 8V narrow inch belts), number of grooves and pitch diameter, plus the mounting: taper bush (TB), QD bush (SDS, SK, SF, E) or a solid hub for machining. The SKF designation carries all of these — PHP 5SPZ250TB is a five-groove SPZ pulley of 250 mm pitch diameter for a taper bush. Pitch diameter and.
Timing pulleys are defined by tooth profile and pitch (HTD 3M, 5M, 8M, 14M curvilinear; T5, T10, AT5, AT10 trapezoidal metric; MXL, XL, L, H, XH inch; GT/PowerGrip variants), number of teeth and belt width. The pitch diameter follows from teeth × pitch ÷ π, so the ratio of a drive is the tooth ratio. SKF designations read PHP 40-14M-40TB: 40 teeth, 14M pitch, 40 mm belt width, taper-bush mounting; inch pulleys state.
Roller chain drives are matched by chain number, which fixes the pitch (ISO / BS series 06B = 3/8 in, 08B = 1/2 in, 10B = 5/8 in, 12B = 3/4 in, 16B = 1 in, 20B = 1¼ in, 24B = 1½ in; ANSI series 40 = 1/2 in, 50 = 5/8 in, 60 = 3/4 in, 80 = 1 in, 100 = 1¼ in, 120 = 1½ in), the number of strands (simplex -1, duplex -2, triplex -3) and, for sprockets, the number of teeth and hub form (A = plate wheel, B = one-side hub, C.
Cylinder seals are ordered by the groove they fit: rod diameter (or cylinder bore for piston seals), groove diameter and groove width, plus profile and material. SKF metric designations state these directly (PTB-20X35X11 = 20 mm rod, 35 mm groove diameter, 11 mm width) and inch designations in thousandths (DZ125-1250-250 = 1.25 in rod); the material code follows (E2F/E2E polyurethane and NBR, J1S PTFE). Profiles:.
A V-ring is an all-rubber axial seal that rotates with the shaft and seals with a flexible lip against a counterface at right angles to the shaft; it excludes dust, water and grease and is used as a secondary seal in front of radial shaft seals and in bearing housings. Types differ in cross-section: VA (standard), VS (narrow, for restricted space), VL (wide-lip for large gaps) and VE (extra-wide for very large.
Low-voltage fuse links are matched by physical size, rated current and utilisation class. NH blade fuses are graded by size (000, 00, 0, 1, 2, 3, 4) — the size fixes the fuse base and the maximum current (NH00 to 160 A, NH1 to 250 A, NH2 to 400 A, NH3 to 630 A); D01/D02 Neozed screw-in fuses (to 16 A and 63 A) and DII/DIII Diazed sizes suit distribution boards; cylindrical fuses 10×38, 14×51 and 22×58 mm fit modular.
Measuring current transformers are specified by ratio (primary current to 5 A or 1 A secondary, e.g. 250/5 A), accuracy class (0.5 or 0.5S for billing and energy meters, 1 for panel instruments, 3 for indication), rated burden (VA, must cover meter plus wiring), window or bar size (busbar dimensions or cable diameter) and construction (solid-core through-hole, split-core for retrofit without disconnecting, summation.
A complete motor starter combines switching, overload protection and often short-circuit protection in one assembly: direct-on-line (DOL) starters for small motors, reversing starters with two contactors and interlock, star-delta assemblies for reduced starting current on motors above about 5.5 kW, and electronic hybrid starters (Siemens 3RM1, Eaton EMS2, Phoenix ELR) that combine relay outputs with electronic.
Position switches are matched by actuator head (plunger, roller plunger, roller lever, adjustable-length lever, rod or wobble stick, spring rod, hinge), contact configuration (1 NO + 1 NC snap-action, 2 NC, 1 NO + 2 NC slow-action with positive opening), body (plastic or metal, standard 30 × 55 mm or compact) and connection (cable gland or M12 connector). Telemecanique XCK/XCM/ZCK modular bodies, Siemens SIRIUS.
IEC 60309 (CEE) plugs and sockets are fully interchangeable between manufacturers when rated current (16, 32, 63, 125 A), number of poles (2P+E, 3P+E, 3P+N+E) and voltage / clock position match — blue 6h for 200–250 V single phase, red 6h for 380–415 V three phase, yellow 4h for 100–130 V, and the 9h/10h/11h positions for special voltages. The type describes the mounting: plug (cable end, male), connector (cable.
Thermostatic expansion valves are selected by refrigerant (the charge in the bulb is refrigerant-specific: R134a, R404A/R507, R407C, R410A, R22, R448A/R449A, R452A, R32, R744 CO₂), nominal capacity (kW at standard conditions), connection size and type (flare or solder ODF, inch or metric), equalisation (internal or external) and the mounting form. The Danfoss ranges are modular: T2/TE 2 (interchangeable orifices,.
Hydronic balancing valves fall into three groups: manual (static) balancing valves with a presetting scale and measuring points (Danfoss MSV-BD, MSV-F2, USV-I, LENO MSV-B; IMI TA STAD, STAF, STAP), automatic differential-pressure controllers that hold a constant Δp across a riser (ASV-PV with partner valve ASV-M or ASV-I; TA STAP), and pressure-independent balancing and control valves that combine flow limitation.
Press fittings are system-specific: the fitting profile (Geberit Mapress, Viega SC-Contur, Uponor S-Press), the pipe material (carbon steel zinc-plated, stainless 1.4401/1.4404, copper, CuNiFe for seawater, multilayer PE-X/Al) and the sealing element (EPDM for heating and potable water, HNBR for gas, FKM for solar and industrial) define the range, and fittings are only pressed with the jaws approved for that system..
Industrial temperature sensors are matched by sensing element (Pt 100 or Pt 1000 platinum RTD to IEC 60751 class A/B, NTC 10 kΩ for HVAC and refrigeration, thermocouple type K/J for high temperature), insertion length (50–400 mm stem into the medium), process connection (G ½ or G ¾ thread, NPT ½, M20, compression fitting, thermowell), output (resistance 2-, 3- or 4-wire; 4–20 mA from an integral transmitter; 0–10 V).
Norwegian installation cables are specified by a type code that fixes insulation, sheath and screen: PFSP (PVC insulated, PVC sheathed, with concentric copper screen, 1 kV, the standard for fixed installation in buildings), PFXP (PVC/PEX, unscreened, 1 kV), IFSI and IFXI (halogen-free equivalents of PFSP/PFXP, 1 kV, with -EMC variants for drives), TFXP (aluminium conductor, 1 kV distribution), EXQ and IFLI.
Directional control valves are matched by function — 5/2 (double-acting cylinders, monostable with spring return or bistable with two solenoids), 5/3 (closed, exhausted or pressurised centre), 3/2 (single-acting cylinders and pilot signals, normally closed or open) and 2/2 (shut-off) — by port size (M5, M7, G 1/8, G 1/4, G 3/8, G 1/2 or push-in tube fittings), actuation (solenoid with 24 V DC or 230 V AC coil,.
Drill bits are chosen by material to be drilled, diameter and shank. Metal: HSS twist drills to DIN 338 (jobber length) and DIN 340 (long), HSS-G ground, HSS-Co (5 % cobalt) for stainless and hard steel, TiN-coated for longer life, in 0.5 mm steps from 1 to 13 mm with reduced shanks above 13 mm. Masonry and concrete: SDS-Plus (to about 30 mm) and SDS-Max (to 52 mm) hammer bits with carbide heads, in lengths from 110.
Loctite anaerobic + activator cross-reference chart. Maps each common Loctite grade (222, 242, 243, 262, 270, 271, 272, 277, 290, 510, 515, 518, 542, 545, 567, 577, 620, 638, 641, 648, 5910, SF7649, SF7800, MR5923) to its function, strength, viscosity, colour and the direct generic-or-competitor equivalent from Permatex, Weicon, Threebond and Krylex. Includes selection rules: match function → strength → viscosity → temperature range → substrate before substituting.
Cross-references Danfoss refrigeration components (expansion valves, solenoid valves, pressure switches, filter driers) to their IMPA marine catalog codes and typical OEM alternatives. Covers TU / TE / TGE thermostatic expansion valves, EVR solenoid valves, KP / RT pressure switches, and DML / DCL filter driers. Includes selection rules for R404A, R410A, R448A, R449A and CO2 (R744) refrigerants.
Cross-references hydraulic hose product families across Parker, Gates and Alfagomma against the SAE J517 and EN 853 / 856 / 857 standards. Covers braided (1-wire, 2-wire) and spiral (4-wire, 6-wire) construction, working-pressure classes, minimum bend radius, temperature range and dry-bulk conveyance restrictions. Also lists common end-fitting series (Parker 43, Gates GlobalSpiral, Alfagomma HFL / HDR) and the crimp-die cross-reference chart.
Cross-references replacement lamps, quartz sleeves and electronic ballasts across the three dominant UV water disinfection OEMs: Berson InLine+, Trojan UV Signa / UVFit / UVSwift, and Xylem Wedeco Spektron / K / MiPRO. Includes lamp electrical envelope (arc length, driver current, warm-up profile), quartz sleeve outside diameter and length, and end-cap style. Written for water utility maintenance planners and ballast-water-management-system commissioning engineers.
The DIN fastener standards most plants still quote have been withdrawn in favour of ISO equivalents, and a handful of dimensions changed on the way: hexagon across-flats on M10, M12, M14 and M22 bolts and nuts, nut heights, some thread lengths. This guide lists the DIN → ISO pairs for bolts, socket screws, nuts, washers, set screws, tapping screws, pins and rivets, flags the standards that have no ISO equivalent and stay DIN (DIN 127, DIN 471/472, DIN 580, DIN 975/976, DIN 6798, DIN 2093), and gives the across-flats and nut-height tables so mixed inventories can be assessed for interchangeability.
Spare parts cross-reference for Atlantium Technologies Hydro-Optic (HOD) UV water disinfection systems: 120 part numbers across UV lamps (95 mm 1 kW to 700 mm 12 kW, with arc length, lamp current, voltage, power density and quartz type), quartz sleeves and windows, AS568 O-rings with dimensions and compounds, lamp connectors, UVIS/UVT sensors and optics, lamp power supplies and ballast modules, controller cards, harnesses, wiper parts, R200 air-cooling filters and controllers — for RZ104, RS104, RZ163, RZ300, RZB300, RZM200, RZM350, EP600 and R200 series.
Spare parts cross-reference for S.I.T.A. srl (SITA UV) disinfection systems: 77 articles with OEM references — 40 W and 80 W low-pressure lamps SI0028104 and SI0028124, amalgam lamp SI028118 for the 400 series, medium-pressure lamps MP1410, MP1411 and MP1413 for SMP units, quartz sleeves SI028103, SI028105, SI028200, SI028204, MP1400 and MP1403 with length and diameter, sleeve O-rings SI028061 and 028207, lamp starters UV652S to UV672SMB, UV sensors, lamp cables and chamber parts — plus a model-to-lamp-and-sleeve table and the data of all twelve SITA UV series.
Three-pole power contactors are matched by their AC-3 rating (motor load at 400 V, expressed in A or kW), the coil voltage and type (AC or DC, or wide-range electronic coil), and the auxiliary contact configuration. The catalogue rows below are grouped by AC-3 current and coil voltage so a Siemens SIRIUS 3RT20, Schneider TeSys D LC1D, ABB AF or Eaton DILM contactor of the same rating can be found for a quotation..
Miniature circuit breakers from the major manufacturers are interchangeable at the functional level when the tripping curve (B, C, D, K or Z), the rated current In and the number of poles match, and the breaking capacity (6 kA or 10 kA to IEC 60898-1; 15–25 kA industrial to IEC 60947-2) is equal or higher. The table below is built from the cBallast catalogue: each cell links to the manufacturer part number in stock.
Moulded-case circuit breakers are selected by frame size, rated current In, number of poles, breaking capacity class (e.g. 25/36/50/70 kA at 415 V) and trip unit type (thermal-magnetic TM or electronic). Functional equivalents exist across Schneider ComPacT NSX (100/160/250/400/630), ABB SACE Tmax XT (XT1–XT7), Eaton NZM (NZM1–NZM4) and Siemens SENTRON 3VA (3VA1/3VA2). This table groups the catalogue by rated.
An overload relay is chosen by its current setting range (the motor full-load current must sit inside the range, ideally in the upper half), its trip class (Class 10 standard, 10A, 20 or 30 for heavy starting) and the contactor it mounts on. The table groups the catalogue by setting range so the equivalent Siemens 3RU2 (thermal) or 3RB3 (electronic), Schneider TeSys LRD, ABB TF42/TF65/TF96 or Eaton.
Residual current devices are matched by number of poles, rated current In, rated residual operating current IΔn (30 mA personal protection, 100/300 mA fire protection, 300/500 mA selective) and type: AC (sinusoidal residual current only), A (AC and pulsating DC — the minimum for circuits with electronic loads), F (mixed frequencies, single-phase drives) and B (smooth DC, three-phase drives and EV charging). RCBOs.
Soft starters are matched by rated operational current (A) and motor power at 400 V, the supply voltage range, the control voltage, whether they switch two or three phases, and whether an internal bypass contactor is fitted. The table groups the catalogue by current so an equivalent Siemens SIRIUS 3RW30/3RW40/3RW52, Schneider Altistart ATS01/ATS22/ATS48, ABB PSR/PSE/PSTX or Eaton DS7 unit can be.
Variable frequency drives are compared by rated motor power (kW at 400 V three-phase, or at 230 V single-phase for small drives), the rated output current, the supply voltage class (1 × 200–240 V, 3 × 380–480 V, 3 × 500–690 V), the overload duty (normal duty 110 % / heavy duty 150 % for 60 s), the enclosure rating (IP20 cabinet, IP55/IP66 wall mount) and the built-in EMC filter class. The table groups the catalogue.
DIN 933 and ISO 4017 describe the fully threaded hexagon head screw: coarse metric thread, product grade A up to M24 and B above, head across-flats to ISO 272 (13 mm for M8, 16 mm for M10, 18 mm for M12 in the ISO series; 17 and 19 mm on the older DIN heads for M10 and M12). Property class 8.8 zinc-plated is the general-purpose stock item; 10.9 and 12.9 for preloaded joints; stainless A2-70 for indoor and mild.
DIN 931 and ISO 4014 hexagon bolts carry a plain shank under the head and a thread length that depends on nominal length (b = 2d + 6 mm up to 125 mm long, 2d + 12 mm to 200 mm, 2d + 25 mm above). The unthreaded shank is used where the joint is loaded in shear or where the clamp length is long and thread in the bearing area is undesirable. Property class 8.8 is standard; 10.9 for high-strength structural and machine.
Two families sit outside the plain DIN 931/933 series. Hexagon flange screws to DIN 6921 (EN 1665) have an integral washer face that spreads the bearing pressure and, in the serrated form, resists loosening without a separate lock washer; they are common on machine covers, guards and vehicle assemblies. Fine-pitch hexagon bolts to DIN 960 (part thread) and DIN 961 (full thread), or ISO 8765 and ISO 8676, use a.
Socket head cap screws to ISO 4762 / DIN 912 are the standard machine-building fastener: cylindrical head of diameter 1.5 d, hexagon socket, thread length 2d + 6 mm on longer screws. Property class 12.9 (black, oiled) is the default for machine tools and jigs, 8.8 and 10.9 where the joint is designed for lower preload or where zinc plating is required, stainless A2-70 and A4-70 for food, water and marine equipment..
Where the full ISO 4762 head does not fit, four variants are used: DIN 7984 low-head cap screws (head height 0.7 d) for restricted spaces; DIN 6912 low-head screws with a pilot recess for key guidance; ISO 10642 / DIN 7991 countersunk socket screws (90° head) for flush surfaces; ISO 7380-1 button-head and ISO 7380-2 button-head with flange for guards, covers and panels where a rounded head is preferred. Head.
Hexagon nuts are specified by thread, property class and material. DIN 934 (height 0.8 d) is the traditional standard; ISO 4032 (style 1, height about 0.9 d) replaces it in new drawings with the ISO across-flats of 16, 18, 21 and 34 mm for M10, M12, M14 and M22. Property class 8 pairs with 8.8 bolts, class 10 with 10.9 bolts, class 12 with 12.9; stainless A2-70 and A4-70/A4-80 pair with stainless bolts. ISO 8673 and.
Prevailing-torque (self-locking) nuts resist loosening under vibration: DIN 985 / ISO 10511 (thin) and ISO 7040 / DIN 982 (full height) use a polyamide insert and are limited to about 120 °C; DIN 980 / ISO 7042 all-metal nuts use a deformed thread and suit higher temperatures and repeated use. Flange nuts DIN 6923 / ISO 4161 (plain or serrated) replace nut plus washer on flange screws. Cap (acorn) nuts DIN 1587.
Washers are chosen by the thread they serve (the inner diameter of a DIN 125 washer for M10 is 10.5 mm, of a DIN 127 spring washer 10.2 mm), by outside diameter and thickness, and by material. DIN 125 / ISO 7089 (140 HV) and ISO 7090 (chamfered, 300 HV for high-strength bolts) are the general-purpose flat washers; DIN 9021 / ISO 7093 large washers spread load on soft materials and slotted holes; DIN 433 / ISO 7092.
Threaded rod is supplied as one-, two- and three-metre bars (DIN 975, now DIN 976-1 form A in long lengths) and as cut-length studs (DIN 976-1 form A, flat ends) or chamfered stud bolts (DIN 976-1 form B) for flange and anchor work. Property class 4.6/4.8 zinc-plated is used for building services hangers and cable-tray supports; 8.8 and 10.9 for machine and structural joints; stainless A2 and A4 for wet and marine.
Spherical roller bearings carry heavy radial and moderate axial loads and tolerate shaft misalignment of about 1–2°. The designation gives the series and the bore: the last two digits multiplied by five is the bore in millimetres from 20 mm upward (22212 = series 222, bore 60 mm); series 213 and 223 are wide, 222 medium, 230/239/240 low-section for large shafts. Suffixes describe the design (E = SKF Explorer with.
Cylindrical roller bearings carry high radial loads at high speed. The design letters state which ring carries the flanges and therefore how much axial location the bearing gives: NU (two flanges on the outer ring, inner ring free — non-locating), N (flanges on the inner ring), NJ (one inner-ring flange — locates the shaft in one direction), NUP (NJ plus a loose flange ring — locates in both directions), NN and NNU.
Angular contact ball bearings carry combined radial and axial loads; the contact angle (B = 40°, AC = 25°, C/CD = 15° on super-precision types) sets the axial capacity. Single-row bearings (series 72, 73 and the narrow 70) are normally fitted in pairs — back-to-back (DB), face-to-face (DF) or tandem (DT) — and universally matchable bearings carry the GA/GB suffix. Double-row types (series 32 and 33, e.g. 3205.
Tapered roller bearings carry combined loads with high axial capacity in one direction and are mounted in opposed pairs or as matched sets (DF, DB, TDO, TDI). Metric designations follow ISO 355: series 302 (30205 = bore 25 mm), 303 (heavier), 313 (steep angle for high axial load), 320 (light), 322/323 (wide), 329/330/331/332 (low section). Inch bearings are ordered as cone (inner ring with rollers) and cup (outer.
Ball bearing units combine a cast-iron or composite housing with a sealed insert bearing whose extended inner ring is locked to the shaft by grub screws (UC/YAR), an eccentric collar (YET) or a tapered sleeve. They are selected by shaft diameter and housing form: pillow block (UCP, SY, SYJ, P2B), four-bolt square flange (UCF, FY, F4B), two-bolt oval flange (UCFL, FYTB, FYT, F2B), three-bolt round flange (UCFC, FYC),.
Ø22 mm control devices from the major makers are functionally interchangeable: the panel cut-out (22.3 mm), the operating functions (momentary or latching pushbutton, mushroom head, emergency stop with turn or pull release, two- or three-position selector with knob or key, pilot light, illuminated pushbutton) and the colour coding to IEC 60073 (red stop, green start, yellow reset, blue mandatory, white/black.
A motor protection circuit breaker combines short-circuit protection, adjustable thermal overload protection and manual switching in one unit. Selection is by the current setting range, which must contain the motor full-load current, and by the frame size, which sets the maximum rating and the accessories (auxiliary contacts, undervoltage release, enclosures). Ranges follow the same 1.6 : 1 steps across makers —.
DIN-rail terminals are matched by nominal cross-section (1.5, 2.5, 4, 6, 10, 16, 35 mm² and up), function (feed-through, protective-earth with rail contact, double- or triple-level, fuse holder, disconnect / test, diode or component blocks) and connection technology (screw, tension spring, push-in). Phoenix Contact UT / ST / PT, Weidmüller WDU / ZDU / A-series, WAGO TOPJOB S 2000 series, Schneider Linergy TR, Eaton.
Compression cable lugs are matched by conductor cross-section (mm²) and stud hole (M6, M8, M10, M12, M16), then by type: standard copper tube lugs to DIN 46235 (KR / KRT / KRF), narrow-palm and 90° angled versions (KRTS, KR-90), aluminium/copper bimetallic lugs for aluminium conductors (AKK), insulated ring terminals for small sections and pin terminals. Elpress, Abiko (Klauke), Melbye and Amokabel tube lugs of the.
Switch-disconnectors are matched by rated operational current (AC-21/AC-23, 16 A to 1600 A), number of poles (3, 4, 6, with or without switched neutral), mounting (panel, door-coupled rotary handle, DIN rail, enclosed safety switch IP65/IP67) and function (main switch with lockable handle, emergency-off in yellow/red, changeover 1-0-2). Eaton P1/P3 rotary switches and N/NZM switch-disconnectors, Schneider Interpact.
Inductive sensors are interchangeable when housing (M8, M12, M18, M30 threaded barrel or rectangular block), mounting (flush / shielded or non-flush / unshielded), nominal sensing distance Sn (2–4 mm for M12 flush, 5–8 mm for M18, 10–15 mm for M30), output (PNP or NPN 3-wire DC, 2-wire AC/DC, NAMUR, analogue), switching function (NO or NC) and connection (M12 connector or cable) match. Telemecanique OsiSense XS,.
ISO 5211 mounting flange dimensions for part-turn valve to actuator attachment. Lists the bolt circle (PCD), fixing thread, number of holes and spigot register bore for every flange code from F03 to F40, with notes on the driving component and on selecting a mounting bracket or adaptor kit.
Wire rope clip (U-bolt grip) size chart: minimum number of clips, rope turnback length and bolt-nut tightening torque by rope diameter from 1/8 in to 1 in, with notes on fitting clips correctly (saddle on the live end), re-torquing after load, and clip selection for 6x19 and 6x36 class rope. Follows the Crosby G-450 application data and the installation requirements of EN 13411-5 and US Federal Specification FF-C-450.
UCP200 series pillow block bearing dimensions: shaft bore, base-to-centre height H, base length L, bolt-hole spacing J, base width A, bolt-hole size and bolt size for units UCP204 through UCP212, with the matching UC insert and P housing numbers. Includes UCP207 (35 mm bore) and the rest of the two-bolt set-screw-locking range. Values recorded from the NTN bearing units dimension table.
Deep groove ball bearing boundary dimensions to ISO 15: bore d, outside diameter D and width B for the 6000 (light), 6200 (medium) and 6300 (heavy) series, models 6000 through 6312. Includes 6204 (20x47x14), 6205 (25x52x15), 6206 (30x62x16) and 6305 (25x62x17), with how to read the bore code and dimension series from the bearing number. Values cross-checked across two independent sources.
UC200-series insert (set-screw) bearing boundary dimensions: bore d, outer (spherical) diameter D, total width B and set-screw thread for UC204 through UC212. Includes UC205 (25x52x34.1), UC206 (30x62x38.1) and UC207 (35x72x42.9), with how the insert pairs with a P / F / FL housing to make a UCP, UCF or UCFL unit. Values verified against NTN per-model data and cross-checked against a second source.
PN100 flange dimensions to EN 1092-1: flange outside diameter D, bolt-circle diameter K, bolt-hole size, number of bolts, bolt size and flange thickness C for Type 11 weld-neck flanges from DN10 through DN350. Includes DN50 (M24), DN100 (210 mm bolt circle, 8 x M27) and DN150. Values cross-checked across three independent sources.
PN6 flange dimensions to EN 1092-1: flange outside diameter D, bolt-circle diameter K, bolt-hole size, number of bolts, bolt size and flange thickness for Type 11 weld-neck flanges from DN10 through DN350. Includes DN50 (140 mm OD, 4 x M12), DN100 (170 mm bolt circle, 4 x M16) and DN150 (8 x M16). The lightest common low-pressure (6 bar) rating; smaller than PN10/PN16 and uses M10 bolts up to DN25. Values cross-checked across two independent reference tables.
PN10 flange dimensions to EN 1092-1: flange outside diameter D, bolt-circle diameter K, bolt-hole size, number of bolts, bolt size and flange thickness C for Type 11 weld-neck flanges from DN10 through DN350. Includes DN50 (165 mm OD, 4 x M16), DN100 (180 mm bolt circle, 8 x M16) and DN150 (8 x M20). The common low-pressure (10 bar) rating; dimensionally identical to PN16 up to DN150. Values cross-checked across two independent reference tables.
PN16 flange dimensions to EN 1092-1: flange outside diameter D, bolt-circle diameter K, bolt-hole size, number of bolts, bolt size and flange thickness C for Type 11 weld-neck flanges from DN10 through DN350. Includes DN50 (165 mm OD, 4 x M16), DN100 (180 mm bolt circle, 8 x M16) and DN150 (8 x M20). Values cross-checked across two independent reference tables.
PN25 flange dimensions to EN 1092-1: flange outside diameter D, bolt-circle diameter K, bolt-hole size, number of bolts and bolt size for Type 11 weld-neck flanges from DN10 through DN350. Includes DN50 (165 mm OD, 4 x M16), DN100 (190 mm bolt circle, 8 x M20) and DN200 (310 mm bolt circle, 12 x M24). The medium-pressure rating between PN16 and PN40. Values cross-checked across two independent reference tables.
ASME B16.47 Series A Class 150 large-diameter flange dimensions: flange outside diameter O, bolt-circle diameter, number of bolts, bolt-hole size and stud size for weld-neck flanges from NPS 26 through NPS 60 — the range above the NPS 24 ceiling of ASME B16.5. Includes NPS 30 (914.4 mm bolt circle, 28 studs), NPS 36 (1085.8 mm, 32 studs) and NPS 48 (1422.4 mm, 44 studs). Series A is not interchangeable with Series B. Values cross-checked across two independent reference tables.
ASME B16.47 Series A Class 300 large-diameter flange dimensions: flange outside diameter O, bolt-circle diameter, number of bolts, bolt-hole size and stud size for weld-neck flanges from NPS 26 through NPS 60 — the higher-pressure companion to the Series A Class 150 reference. Includes NPS 30 (997.0 mm bolt circle, 28 studs), NPS 36 (1168.4 mm, 32 studs) and NPS 48 (1371.6 mm, 32 studs). Series A is not interchangeable with Series B, and Class 300 is not interchangeable with Class 150. Values cross-checked across two independent reference tables.
ASME B16.47 Series A Class 900 large-diameter flange dimensions: flange outside diameter O, bolt-circle diameter, number of bolts, bolt-hole size and stud size for weld-neck flanges from NPS 26 through NPS 48 — the highest-pressure Series A class, which is tabulated to NPS 48. Includes NPS 30 (1085.8 mm bolt circle, 20 studs), NPS 36 (1289.0 mm, 20 studs) and NPS 48 (1587.5 mm, 24 studs). For Class 400/600/900 the Series A flange adopts the Series B outside diameter and bolt circle at NPS 38 and larger, so NPS 38 shares the NPS 36 outside diameter and bolt circle. Series A is not interchangeable with Series B, and Class 900 is not interchangeable with Class 150, 300 or 600. Values cross-checked across three independent reference tables.
ASME B16.47 Series A Class 400 large-diameter flange dimensions: flange outside diameter O, bolt-circle diameter, number of bolts, bolt-hole size and stud size for weld-neck flanges from NPS 26 through NPS 60 — the rating between Class 300 and Class 600 on the Series A pressure ladder. Includes NPS 30 (997.0 mm bolt circle, 28 studs), NPS 36 (1168.4 mm, 32 studs) and NPS 48 (1403.4 mm, 28 studs). For Class 400/600/900 the Series A flange adopts the Series B outside diameter and bolt circle at NPS 38 and larger, so NPS 38 steps down from NPS 36. Series A is not interchangeable with Series B, and Class 400 is not interchangeable with Class 150, 300 or 600. Values cross-checked across two independent reference tables.
ASME B16.47 Series B Class 150 large-diameter flange dimensions: flange outside diameter, bolt-circle diameter, number of bolts, bolt-hole size and stud size for weld-neck flanges from NPS 26 through NPS 60 — the compact companion to Series A, carrying more, smaller bolts on a smaller bolt circle. Includes NPS 30 (846.1 mm bolt circle, 44 studs), NPS 36 (1009.6 mm, 44 studs) and NPS 48 (1335.1 mm, 44 studs). Series B is NOT interchangeable with Series A, and neither mates to an ASME B16.5 flange. Values cross-checked across two independent reference tables (mm and inch), which agree on outside diameter, bolt circle and bolt count for every NPS.
ASME B16.47 Series B Class 300 large-diameter flange dimensions: flange outside diameter, bolt-circle diameter, number of bolts, bolt-hole size and stud size for weld-neck flanges from NPS 26 through NPS 60 — the higher-pressure companion to Series B Class 150 and the compact alternative to Series A. Includes NPS 30 (920.8 mm bolt circle, 36 studs), NPS 36 (1089.0 mm, 32 studs) and NPS 48 (1416.0 mm, 40 studs). Series B is NOT interchangeable with Series A, and neither mates to an ASME B16.5 flange. Values cross-checked across three independent reference tables (mm and inch), which agree on outside diameter, bolt circle and bolt count for every NPS.
ASME B16.47 Series B Class 600 large-diameter flange dimensions: flange outside diameter, bolt-circle diameter, number of bolts, bolt-hole size and stud size for weld-neck flanges from NPS 26 through NPS 60 — the higher-pressure companion to Series B Class 300 and the compact alternative to Series A. Includes NPS 30 (927.1 mm bolt circle, 28 studs), NPS 36 (1104.9 mm, 28 studs) and NPS 48 (1460.5 mm, 32 studs). Series B is NOT interchangeable with Series A, and neither mates to an ASME B16.5 flange. Values cross-checked across two independent reference tables (mm and inch), which agree on outside diameter, bolt circle and bolt count for every NPS; the relation bolt hole = stud + 1/8 in holds on every row.
ASME B16.47 Series B Class 900 large-diameter flange dimensions: flange outside diameter, bolt-circle diameter, number of bolts, bolt-hole size and stud size for weld-neck flanges from NPS 26 through NPS 48 — the highest-pressure Series B class tabulated, and the compact alternative to Series A. Includes NPS 30 (1035.0 mm bolt circle, 20 studs), NPS 36 (1200.2 mm, 24 studs) and NPS 48 (1587.5 mm, 24 studs). Like Series A Class 900 the range runs to NPS 48 rather than NPS 60. Series B is NOT interchangeable with Series A, and neither mates to an ASME B16.5 flange. Values cross-checked across three independent reference tables (mm and inch), which agree on outside diameter, bolt circle and bolt count for NPS 26 to NPS 36; the relation bolt hole = stud + 1/8 in holds on every row.
ASME B16.20 Class 150 spiral wound gasket dimensions for ASME B16.5 raised-face flanges, NPS 1/2 through NPS 24: inner-ring inside diameter (d1), sealing element (winding) inside diameter (d2), sealing element (winding) outside diameter (d3) and centering (outer) ring outside diameter (d4), all in millimetres. The gasket matches the ASME B16.5 Class 150 flange it seats in; the Class 300 gasket of the same NPS differs because its flange has a larger bolt circle. Values cross-checked across three independent reference tables — Wermac and GlobalSupplyLine agree on all four diameters for every NPS, and FlangeBoltChart confirms the winding inside diameter.
ASME B16.20 Class 300 spiral wound gasket dimensions for ASME B16.5 raised-face flanges, NPS 1/2 through NPS 24: inner-ring inside diameter (d1), sealing element (winding) inside diameter (d2), sealing element (winding) outside diameter (d3) and centering (outer) ring outside diameter (d4), all in millimetres. The inner ring and winding (d1, d2, d3) are the same as the Class 150 gasket of the same NPS because the flange bore is unchanged; the centering ring outside diameter (d4) is larger because the Class 300 flange has a larger bolt circle, so the gasket is not interchangeable between classes. Values cross-checked across two independent reference tables — Wermac and piping-world agree on all four diameters for every NPS.
ASME B16.20 Type R ring-joint (RTJ) gasket dimensions by ring number, R11 through R45: average pitch diameter P, ring width A, oval ring height B, octagonal ring height H and the flat width on the octagonal ring C, all in millimetres. RTJ gaskets are identified by R-number, not pipe size — the same NPS has a different R-number at each pressure class — and the oval and octagonal cross-sections share pitch diameter and width but differ in height. Values cross-checked across two independent reference tables — Wermac and piping-world agree on every value for every ring number — with an inch table (Flange Bolt Chart) confirming by conversion.
ASME B16.47 Series A Class 600 large-diameter flange dimensions: flange outside diameter O, bolt-circle diameter, number of bolts, bolt-hole size and stud size for weld-neck flanges from NPS 26 through NPS 60 — the highest-pressure member completing the Series A trio (Class 150 / 300 / 600). Includes NPS 30 (1022.4 mm bolt circle, 28 studs), NPS 36 (1193.8 mm, 28 studs) and NPS 48 (1460.5 mm, 32 studs). Series A is not interchangeable with Series B, and Class 600 is not interchangeable with Class 150 or 300. Values cross-checked across three independent reference tables.
PN40 flange dimensions to EN 1092-1: flange outside diameter D, bolt-circle diameter K, bolt-hole size, number of bolts and bolt size for Type 11 weld-neck flanges from DN10 through DN350. Includes DN50 (165 mm OD, 4 x M16), DN100 (190 mm bolt circle, 8 x M20) and DN150 (8 x M24). The higher-pressure companion to the PN16 reference. Values cross-checked across three independent reference tables.
ASME B16.5 Class 150 flange dimensions: flange outside diameter O, bolt-circle diameter, number of bolts, bolt-hole size and bolt size for raised-face weld-neck flanges from NPS 1/2 through NPS 24. The inch / NPS counterpart to the EN 1092-1 PN references. Includes NPS 2 (6.00 in OD, 4 x 5/8 in), NPS 4 (7.50 in bolt circle, 8 x 5/8 in) and NPS 6 (8 x 3/4 in). Values cross-checked across two independent reference tables.
ASME B16.5 Class 300 flange dimensions: flange outside diameter O, bolt-circle diameter, number of bolts, bolt-hole size and bolt size for raised-face weld-neck flanges from NPS 1/2 through NPS 24. The higher-pressure companion to the Class 150 reference, completing the inch / NPS flange pair alongside the EN 1092-1 PN references. Includes NPS 2 (6.50 in OD, 8 x 5/8 in), NPS 4 (7.88 in bolt circle, 8 x 3/4 in) and NPS 6 (12 x 3/4 in). Values cross-checked across two independent reference tables.
Pipe size cross-reference: nominal bore DN, nominal pipe size NPS and pipe outside diameter under both ASME B36.10M and EN 10220 / ISO 4200, from DN15 (NPS 1/2) to DN600 (NPS 24). The starting point for selecting or matching the four flange references (EN 1092-1 PN16 / PN100 and ASME B16.5 Class 150 / Class 300). Lists where the two OD series diverge — most visibly DN65 at 73.0 mm (ASME) vs 76.1 mm (EN) — plus DN20, DN25, DN32, DN125 and DN250.
DIN 2093 disc spring (Belleville) catalogue: Series A (stiff, h0/t ≈ 0.4), Series B (medium, h0/t ≈ 0.75) and Series C (soft, h0/t ≈ 1.3) dimensions with outside diameter De, bore Di, thickness t, cone height h0 and load F at 75 % deflection for the 16 core sizes 8 mm through 250 mm. Includes stacking guide (parallel adds force, series adds travel), material grades (50CrV4 / 51CrV4 standard, 30WCrV6-3 for hot service, X7CrNiAl17-7 stainless for corrosive service) and the h = 0.15·h0 to 0.75·h0 working range. Values cross-checked against Schnorr and Christian Bauer / Mubea handbooks.
ASME B16.5 Class 600 raised-face weld-neck flange dimensions NPS 1/2 through NPS 24: outside diameter O, bolt circle, bolt hole, stud count, stud size and flange thickness tf. High-pressure step in the B16.5 range (60–100 bar service in oil, gas, chemical, refinery and offshore piping). Class 600 keeps 4 studs to NPS 1-1/2, steps to 8 at NPS 2, to 12 at NPS 6, then 16 at NPS 10, 20 at NPS 12–18 and 24 at NPS 20+.
ASME B16.5 & B16.47 flange bolt torque values by stud size (½-13 UNC through 4-8UN) and pressure class (150, 300, 600, 900, 1500, 2500) for A193 Grade B7 studs with A194 Grade 2H heavy hex nuts, ASME PCC-1 target-stress method at 50 % of specified minimum yield. Spiral-wound and ring-joint gasket seating factors, K-factor guidance (0.16 dry, 0.13 anti-seize, 0.11 nickel-based paste), stud lubrication factors, target bolt stress ranges 30-50 ksi typical, and pass-pattern sequences 1-2-3 through 8-pass elastic tightening. For hot service and PWHT joints see notes on relaxation retorque and hot-torque intervals.
SKF 81xxx cylindrical roller thrust bearing reference: bore d, outside diameter D, height H, dynamic (C) and static (C0) load ratings, and limiting speed for the 81100 (light) and 81200 (medium) TN series from 81102 (bore 15 mm) through 81140 (bore 200 mm). Includes SKF K-suffix variants (K81xxx with a separate housing washer), interchange to FAG, NSK, NTN and Timken cylindrical roller thrust bearings, cage-material notes (TN nylon vs TVPB), fatigue-load limit Pu values, and application guidance for gearbox reaction, marine thrust and hydraulic press service.
Complete PN16 flange bolt-length and stud reference: metric bolt size and number of bolts per DN10-DN2200 flange (from EN 1092-1 Table 9), calculated stud length for two matching PN16 raised-face flanges with 2 mm gasket, and applied bolt torque at K=0.16 for A193 B7 studs at 50% SMYS. Includes M12/M16/M20/M24/M27/M30/M33/M36/M42/M48/M56/M64 sizes across the DN range, weight per hardware kit, and notes on stud vs cap-screw selection for blind vs weld-neck pairings. Bolt lengths cross-checked against EN 1092-1 and DIN 976-1 stud practice.
SKF single-row deep groove ball bearing complete reference across the four ISO 15 metric series: 6000 (extra light), 6200 (light), 6300 (medium), 6400 (heavy). Bore d, outside diameter D, width B, dynamic C and static C₀ load ratings, limiting speed (grease and oil), suffix decoder (2RS/2RSH/2Z/2RSL/2NR/2RS1/N/NR/M/MA/C3/C4), cross-maker interchange to FAG, NSK, NTN, Timken, Koyo. Applications: electric motors, gearboxes, machine tools, fans, pumps, agricultural machinery, marine deck-machinery.
Refrigeration (ACR) copper tube sizes from 1/4 to 2 1/8 inch OD with metric equivalents, standard wall thicknesses, allowable working pressures, and when K65 high-pressure alloy replaces plain copper for CO2 and R410A plants.
How AS568 dash numbers encode O-ring size, the five cross-section series with inside-diameter tables for the most-used dash numbers, metric equivalents, and material quick-selection (NBR, FKM, EPDM) with temperature limits.
Conversion table from American Wire Gauge (AWG 24 to 4/0) and kcmil to metric mm² cross sections, with conductor diameters and indicative copper current ratings, plus the standard IEC cable sizes and how to substitute between the systems.
Dimension table for BSPP (G), BSPT (R), NPT and metric fine threads used on fittings, glands and sensors: major diameter, threads per inch or pitch, tap drill, how to tell them apart with calipers, and which pairs seal together.
Metric cable-gland sizes M12–M63 with standard clamping ranges and spanner sizes, how to pick a gland from the cable outside diameter, NPT equivalents, IP sealing, and Ex e/Ex d selection notes for hazardous areas.
IT tolerance values for IT6–IT11 by size range, what H7/g6, H7/k6, H7/p6 and other common ISO 286 fit pairs mean in practice, and clearance/interference numbers for the shaft-and-hole sizes used in bearings, bushings and couplings.
Dimension table for JIS B2220 10K slip-on/plate flanges from 15A to 300A: outside diameter, bolt-circle diameter, number and size of bolts, flange thickness, with guidance on mating JIS to EN/PN and ASME class flanges.
Tightening torque table for metric coarse-thread bolts in property classes 8.8, 10.9 and 12.9 from M3 to M36, for dry and lightly oiled threads, with the K-factor method, proof-load background and stainless A2/A4 guidance.
Saturation pressure–temperature table for R134a, R404A, R410A and R448A/R449A in bar gauge from −40 °C to +60 °C, how to use PT values for superheat and subcooling, and what glide means for blends.
Profile dimensions for wedge belts SPZ, SPA, SPB, SPC and classical Z, A, B, C sections, how belt length codes work (Lp/Ld), minimum pulley diameters, tensioning basics and cross-brand interchange.
Gasket material selection guide covering the 13 gasket families most often specified in marine and industrial service: Klingersil, Top-Chem PTFE, ePTFE tape, spiral wound (SWG, ASME B16.20), grafoil-filled SWG, ring joint (RTJ), kammprofile, aluminium-jacketed, Alfa Laval EPDM / NBR PHE plate gaskets. Service, T max, p max and thickness per family.
Zerust volatile corrosion inhibitor (VCI) packaging selection guide covering plastabs (ICT510-PCS, ICT420-35P), Vapor Capsule VC1, Axxanol Spray-G and 33-CP, Multimetal Film Bag and Ferrous Poly Film, VCI kraft paper and EXCOR marine film. Form, dose, protected metals (Ferrous vs Multimetal), shelf life per product. Selection rules and how to order (standard packs from stock, non-standard cut-to-order 2–3 weeks).
Side-by-side buyer comparison of Waygate DMS Go+ against direct-competitor ultrasonic thickness gauges (Waygate DMS 2, Krautkramer 27MG, Olympus 45MG / 27MG, Dakota MMX-6 DL+, Mitech MT160, Sonatest T-Gage+, Cygnus 4+ Multi Mode) for marine hull inspection and process-piping corrosion mapping. Range, resolution, mode, screen and shortlist rules by job.
How to identify, cross-reference and procure OEM industrial and marine spare parts by manufacturer part number (MPN), IMPA code, EAN barcode and OEM cross-reference. Compares direct-OEM, authorised-distributor and quote-to-invoice sourcing routes; documents the ISO 9001 documentation trail expected on marine engine-room, water treatment and process-control components.
How to select a Schneider Electric Acti9 iC60 RCBO by pole count, current rating, tripping curve (B / C / D), residual-current sensitivity (10 / 30 / 100 / 300 mA), waveform class (AC / A / F / B) and short-circuit breaking capacity (Icn). Includes decoding of the Acti9 catalog reference A9D…, application map for residential vs. commercial vs. industrial installations, and cross-reference to comparable ABB DS201, Hager ADC and Siemens 5SU RCBO families.
Coordination tables for building a Siemens SIRIUS motor starter from a 3RV2 motor protection circuit breaker and a 3RT2 contactor. Covers frame sizes S00, S0, S2, S3, S6, S10 and S12, IEC 60947-4-1 type-1 and type-2 coordination categories, direct-online (DOL) and star-delta (Y-Δ) starter architectures, and typical current settings for AC-3 motor duty. Includes decoding of the 3RV2 and 3RT2 catalog references.
Wire rope selection guide covering construction (6x19, 6x36, 8x19, 19x7, 35xK7), core (FC / IWRC), lay direction (RH / LH regular vs Lang lay), tensile grade (1770 / 1960 / 2160 MPa), preformed vs non-preformed, and coating (galvanised / stainless / plastic-jacketed). Includes minimum breaking load (MBL) tables per ISO 2408 for common diameters, D/d ratio guidance per ISO 4308-1 for cranes and hoists, discard criteria per ISO 4309, and end-termination options (poured socket, swaged, wedge, thimble + Flemish eye).
Rolling bearing selection reference for industrial and marine service. Covers the four dominant bearing types (deep-groove ball, angular-contact ball, tapered roller, spherical roller), ISO 15 dimension-series coding (bore code, diameter series, width series), standard bore range 10 to 320 mm, radial vs axial load capacity, limiting speed, precision class (P0 / P6 / P5 / P4 / P2), interior clearance class (C2 / CN / C3 / C4 / C5), and cage material (steel / brass / polyamide). Includes SKF / FAG / NSK / NTN cross-reference for the most-stocked SKUs.
Explains the ten IEC 60034 motor duty classes (S1 through S10) that define how a motor's rated power relates to its actual thermal load. Covers continuous duty (S1), short-time duty (S2), intermittent periodic duty (S3, S4, S5), continuous-operation periodic duty (S6), continuous cyclic duty with electric braking (S7), continuous with related load and speed changes (S8), non-periodic load and speed variations (S9), and discrete constant loads (S10). Includes the two derating parameters — cyclic duration factor and load-related characteristic — and worked examples for pump, crane hoist and lift-truck applications.
How to specify an industrial grease by its four defining characteristics: NLGI consistency grade (00 through 6), base oil (mineral, synthetic PAO, PAG, silicone, ester), thickener (lithium, calcium, aluminium, polyurea, PTFE, bentonite / clay), and operating temperature envelope. Includes cross-reference for the most-used industrial and marine greases (Mobil Mobilith SHC, Shell Gadus S3, Klüber Isoflex, SKF LGMT / LGHP, Molykote BR2 Plus).
Steam trap selection reference. Covers the four dominant working principles: float (mechanical, density-based), thermodynamic (velocity / disc trap), thermostatic (temperature-actuated, balanced-pressure or bimetallic), and inverted-bucket (mechanical). Includes selection matrix by application (steam main drip, process heater, tracer line, condensate return), sizing procedure (condensate load + differential pressure), safe operating discharge (SOD) capacity, and life-cycle failure modes.
Pneumatic cylinder selection reference against ISO 15552 (successor to ISO 6431 / VDMA 24562). Covers bore sizing from theoretical force (F = P × A × η), stroke-to-bore ratio guidance to avoid piston-rod buckling, standard bore range 32-320 mm, mounting styles (foot, flange, clevis, trunnion), cushioning options (fixed, adjustable pneumatic, hydraulic shock), and cross-reference between SMC (CDA2, C96), Festo (DSBC, DSBG) and Parker (P1D, P1E) product families.
Butterfly valve type selection covering the three dominant geometries: concentric (resilient-seated), high-performance (double-offset, PTFE-seated), and triple-offset (metal-seated). Includes pressure/temperature service envelopes, seat/seal materials, actuation options, and API 609 category A/B classification.
Torque wrench selection, correct use technique, and calibration interval per ISO 6789. Covers wrench types (click, dial-indicator, digital, hydraulic), Class I (indicating) vs Class II (setting) tolerance, torque unit conversion, and calibration frequency guidance for industrial and maintenance workshops.
Ultrasonic thickness gauge selection reference: dual-element corrosion gauges (Baker Hughes DMS Go+, Evident 45MG, 27MG) versus single-element precision and flaw-detector families (Baker Hughes DMS 2, USM 36; Evident EPOCH 650, EPOCH 6LT), keyed to ISO 16809 measurement principles and ASTM E797 practice. Includes transducer selection by material and thickness range (1 mm through 635 mm), coupling and B-scan corrosion mapping guidance, thru-coating measurement (echo-to-echo) for painted hulls and pipe, temperature range and hot-surface transducer choice for insulated pipework, calibration to steel and non-steel materials (V-block, step wedge, custom), and typical marine, oil & gas, pressure vessel and refractory applications.
Milwaukee M12 system compatibility reference: battery-to-tool matrix across M12 (brushed) and M12 FUEL (POWERSTATE brushless) tools, REDLITHIUM CP1.5/CP2.0/CP3.0, XC3.0/XC4.0/XC6.0 and HIGH OUTPUT HO2.5/HO5.0 pack ratings (Ah, Wh, cell count, weight), M12 charger compatibility (48-59-2401 sequential, 48-59-1801 SUPER, 48-59-1808 packout), M12 jigsaw 2545-20 blade compatibility (T-shank), and cross-platform notes on M18 and REDLINK/One-Key connectivity. Covers M12 FUEL 2545-20 jigsaw, 2554-20 impact wrench, 2504-20 hammer drill, 2551-20 Surge, 2960-20 ¾″ impact.
Loctite anaerobic product selection: threadlockers (222 low-strength, 243/2400 medium, 262 high, 271 permanent, 277 large-thread), retaining compounds (601, 638, 641, 648, 660, 680), gasket makers (510, 515, 518, 574, 5188), instant adhesives (401, 406, 480, 495, 496) and cleaners/primers (7063 general, 7649 primer, 7471 activator). Each product mapped to thread size, gap fill (mm), fixture and full-cure times, temperature range, strength and typical application. Cross-reference to Permabond, 3M, Anaerobic Adhesives (AA) and Vibra-TITE equivalents.
Complete cross-reference between Loctite, Weicon, Permatex, ThreeBond and Anabond anaerobic adhesive products. Threadlockers (Loctite 222/243/262/271/277/290 ↔ Weicon AN 302-6, Permatex 24000-27200, ThreeBond 1360/1401/1360F), retaining compounds (Loctite 601/638/641/648/660/680 ↔ Permatex 68050, Weicon AN 305-11, ThreeBond 1373/1360W), gasket makers (Loctite 510/515/518/574/5188 ↔ Permatex 54540/59214/51817, Weicon AN 305-72, ThreeBond 1110F/1211/1215/1216), CA instants (Loctite 401/406/410/480/495/496 ↔ Permatex 82190, ThreeBond 1741/1747), and surface prep (Loctite 7063/7649/7471 ↔ Permatex 82360). Cross-referenced by chemistry and cure characteristics.
Complete Berson UV spare part catalogue: replacement UV amalgam and low-pressure lamps for InLine 4500+, MPI, LPI, PRO7 and B810H reactors; quartz sleeves; UV intensity sensors (SR-04, SR-05, MPI intensity monitor); electronic ballasts and lamp drivers; capacitors (P/N 10178-1110 with resistor for LPI series); sensor holders and wipers; power-supply modules; sealing kits; O-rings and gaskets. Sourcing cBallast is a Berson spares stockist for ballast-water and drinking-water treatment operators worldwide — request a quote by reactor tag, serial or family. Fast quotation on scheduled 8,000- and 12,000-hour lamp replacements.
Complete Techcross ECS ballast water management system spare parts reference: TRO sensor (Total Residual Oxidant), calibration DPD reagent and magnetic bar for GDS calibration, ESJ (Electronic Support & Junction) board TC010154, PLC TC000829, electrolysis cell electrode plates, DC-CT transformer for ECU units, CLX reagent kit, cabinet spares. Covers ECS-1, ECS-2, ECS-2.08 firmware generations. IMO Type Approval (BWMS), USCG Type Approval reference. cBallast supplies Techcross ECS spares to shipowners globally on 24-72 h port drop for scheduled and urgent maintenance.
Wärtsilä 32, 46 and 50DF medium-speed engine spare parts reference. Wear-part groups: cylinder liner (W32 bore 320 mm, W46 bore 460 mm, W50DF bore 500 mm), piston with crown and skirt, piston rings (compression + oil-scraper), cylinder head with 2× intake + 2× exhaust valves and seats, injection nozzle for HFO / MDO / VLSFO / LNG dual-fuel service, high-pressure fuel injection pipe, connecting rod bearing, main bearing (S70MC-C reference for MAN B&W), turbocharger cartridge (ABB TPL / Napier NA / MHI MET typical), and lube-oil / fuel-oil filter elements. Class-society approved (DNV, ABS, LR, BV, RINA, KR, NK, CCS). cBallast supplies OEM Wärtsilä parts and IACS-approved equivalents on 24-72 h port drop.
Comprehensive refrigerant obsolescence and transition reference: R22 (banned in EU since 2015), R404A (GWP 3922, service-only 2020), R507A (GWP 3985, restricted), R410A (transitional) → next-generation drop-in and system-redesign replacements R32 (GWP 675), R448A (Solstice N40, GWP 1387), R449A (Opteon XP40, GWP 1397), R454B (Opteon XL41, GWP 466), R1234yf (GWP 4), R1234ze(E) (GWP 7), R290 propane. Includes GWP values, glide, ODP, safety class (A1/A2L/A3), lubricant compatibility (POE/PAG/PVE/mineral), retrofit steps and replacement-charge factor. Covers marine and shipboard refrigeration compliance under IMO/EEDI and EU F-Gas.
MAN B&W two-stroke crosshead engine spare parts reference across MC / MC-C / ME / ME-C / ME-B / G-series families. Bore range S26MC (260 mm) through G95ME-C (950 mm) — the world's dominant ship main propulsion in tanker, container, bulk-carrier and cruise service. Wear parts covered: main bearing (top-, bottom- and thrust), crankshaft, connecting rod bottom-end bearing, crosshead bearing, piston with piston-rod, piston rings, cylinder cover with 4-valve head (exhaust valve on some, hydraulic on ME), fuel valve (injector), high-pressure fuel pipe, fuel pump plunger + barrel, exhaust valve seat, cylinder liner (with lubricator quills), turbocharger cartridge (ABB TPL85/93 / MHI MET / Napier NA40-96). MAN diesel A/S authorised parts and IACS-approved equivalents on 24-72 h port drop.
Complete cable gland selection reference: metric thread sizes M12 through M85, NPT ¼″ through 3″, PG7 through PG42 (obsolescent), IP66/IP67/IP68 rating, Ex/ATEX Ex d / Ex e / Ex nR marking, materials (brass, stainless 316L, nickel-plated brass, nylon), for armoured (SWA / BW / CW / E1FW), unarmoured (E1W / A2) and screened cables. Manufacturer references: CMP Cable Glands, Hawke, Prysmian, Wiska, Roxtec, ABB, Weidmüller, Peppers, HKK. Includes gland size selection tables by cable OD and armour type, IP68 water-pressure rating (2 m and 30 m depth), and marine class-society acceptance (DNV, ABS, LR, BV).
What C-parts are, why they carry 60–80 % of a plant's part numbers but only 5–10 % of purchase value, how their process cost outweighs their unit price, and how to run them: ABC/XYZ classification, total-cost-of-ownership breakdown, a comparison of direct purchase, blanket orders, two-bin kanban, VMI and single-source consolidation, a specification checklist for every fastener line, and the certificates (EN 10204 2.1/2.2/3.1/3.2) and quality systems (ISO 16426) to ask for.
Comparison of the finishes used on standard fasteners: zinc electroplating with Cr(III) passivation (blue/clear, yellow, black, with sealer), zinc-nickel, zinc flake (Geomet, Delta-Protekt, Dacromet-type), hot-dip galvanising, zinc and manganese phosphate, black oxide and stainless steel — with typical coating thickness, neutral-salt-spray life to white and red rust (ISO 9227), suitability per property class (hydrogen embrittlement), thread-tolerance effects (6g/6H vs 6az/6ax oversize nuts), galvanic compatibility, and which finish to specify for corrosivity categories C1–C5 of ISO 12944.
Choosing the anchor by base material and load: drop-in anchors for threaded-rod suspension, wedge/expansion bolts for brackets in solid concrete, toggle anchors for hollow decks, plastic plugs for light duty — with setting technique, edge distances and the stocked sizes.
How to shortlist a packaged condensing unit for a cold room or process cooler: temperature class (MBP/LBP), refrigerant, housed versus open frame, air- versus water-cooled, and what the Danfoss Optyma Plus, Tecumseh WLX/WMX/WMY and UMT/CUBO Smart & Aqua ranges in the catalogue each cover.
Sizing a control transformer for refrigeration and automation panels: steady versus inrush VA, 12 V and 24 V secondaries, DIN-rail and wall-mount formats in stock (3–20 VA), fusing both sides and the earthing convention for control circuits.
How to read a Danfoss Maneurop MTZ compressor designation, which model sizes the range covers, what the voltage code means, and what to check (oil, refrigerant, rotalock connections, crankcase heater) when replacing an MTZ in a commercial refrigeration or marine provision plant.
Orientation in the Embraco hermetic compressor families stocked for commercial refrigeration — NEK, NEU, NT, NJ and SE — with an explanation of CSIR, CSCR and RSIR starting, the role of the electrical start box, and what changes on R290 (propane) versions.
What each fastener finish actually survives: electro-zinc for dry interiors, hot-dip galvanising outdoors, Sendzimir strip coatings on brackets, acid-resistant A4 stainless for marine and washdown — plus galvanic pairing rules and the stocked examples of each class.
The difference between solid-core liquid-line driers (DML 100 % molecular sieve, DCL with activated alumina), suction-line burn-out driers (DAS) and replaceable-core shells (DCR), how to size the connection and when to change cores, with the catalogue's stocked sizes.
What the rating code on an extinguisher actually certifies — the A number (wood crib size), B number (litres of burning liquid), class C/F marks — and how powder, CO2, foam and lithium-specific (AVD) types map to workshop, electrical, kitchen and battery risks, with the stocked Housegard range and signage.
The five choices that specify an inductive sensor — barrel size, rated sensing distance Sn, flush or non-flush mounting, output transistor type (PNP/NPN) and switching function (NO/NC) — with the correction factors for target material and the catalogue's OsiSense XS size ladder.
How modular limit switches compose from a contact body and an operating head, choosing between plunger, roller plunger, roller lever, adjustable lever, cat's-whisker and cross actuators, snap versus slow-break contacts, and the stocked XCK complete switches and ZCK bodies, heads and levers.
Choosing a photoelectric sensing mode by range, target and environment: through-beam emitter/receiver pairs, polarised retro-reflex against shiny targets, plain diffuse, background suppression and laser variants, mapped to the OsiSense XUB/XUK/XUX ranges in stock.
Supporting refrigerant lines without crushing insulation or creating cold bridges: insulated pipe clamps with load-bearing inserts, heavy-duty two-piece clamps for plant rooms, light clamps by model number for 5/8 to 2 5/8 inch lines, spacing practice and rail-system mounting.
How to choose elastomeric insulation wall thickness (9, 13, 19, 25 or 32 mm) for refrigeration suction lines by pipe size and operating temperature, why condensation control sets the minimum, and the catalogue's size matrix from 1/4 inch to 3 inch with continuous-coil and 2 m length formats.
How to read the EN 388 mechanical-risk pictogram (abrasion, cut, tear, puncture plus ISO cut letter and impact mark), what EN 511 adds for cold, choosing disposable versus assembly versus winter-lined gloves, and glove discipline that actually prevents injuries.
Choosing between an electromechanical pressure switch and an electronic transmitter: fixed safety cut-outs versus continuous control signals, adjustability and covers (XMA/XMX), high-pressure Nautilus switches, and the Carel SPKT / Danfoss AKS ratiometric and 4–20 mA transmitter ranges in stock.
Choosing panel and service gauges: accuracy class, glycerine filling against pulsation, refrigerant temperature scales, high-side Ø80 class-1.0 gauges, dial thermometers and K-type clamp-on pipe probes for superheat work — with calibration sanity checks.
Which lubricant class belongs with which refrigerant — polyolester (POE) with HFC/HFO, PAG with ammonia and R290 in specific designs, mineral and alkylbenzene with legacy fluids, and the special oils for transcritical CO2 — with the Fuchs Reniso and Emkarate grades carried in the catalogue and the handling rules that keep ester oils dry.
How to size a contactor by AC-3 rating and coil voltage, pick the thermal overload relay whose range brackets the motor current, and assemble the stocked TeSys LC1D/LC1K + LRD combinations with auxiliary contact blocks — plus the setting and test routine.
Choosing hanger rod and studs by material and duty: zinc-plated steel for dry interiors, grooved snap-to-length rod for productivity, acid-resistant A4 for washdown and marine, nylon where isolation or chemistry demands, plus stud lengths, coupling nuts and load sense.
How radial shaft seals are designated (shaft × housing × width), what HMS5/HMSA10 and TC/SC lip codes mean, NBR vs FKM speed and temperature limits, installation rules and how to measure an unknown seal.
Replacement spare parts for Wärtsilä 46 and VASA 46 medium-speed engines (6L46 to 18V46): which components the catalogue covers — valve seats and guides, exhaust valves, cylinder liners, piston rings, main/con-rod/cam bearings, injection equipment, filters — and exactly what to state when requesting a quotation.
Replacement spare parts for the Wärtsilä 32 engine family (6L32 to 18V32): catalogue coverage for cylinder liners, piston rings, valve seats and guides, main/con-rod/cam bearings, injection pumps and nozzles, starting-air valves, thermostat valves, mounts and filters, with the ordering checklist marine buyers use.
Replacement spare parts for Wärtsilä 38 and dual-fuel 50DF engines: catalogue coverage for cylinder liners, piston rings, valve seats and guides, exhaust valves, bearings, injection and turbochargers, plus the dual-fuel-specific points to state in an enquiry.
How to read a Bitzer ECOLINE designation (2JES-07Y, 4FES-3Y, 4NES-20Y …), which models the catalogue lists from 2-cylinder to the large 4- and 6-cylinder frames, and what to check — oil, refrigerant release, motor code — when replacing a semi-hermetic compressor.
Matching a Grundfos CR vertical multistage pump to its overhaul kit (KIT-CR1, KIT-CR3, KIT-CR5, KIT-CR10, KIT-CR15), what a kit typically contains, how to read the CR nameplate, plus NB end-suction kits and DME dosing-pump wear kits.
Spares for DESMI NSL in-line centrifugal pumps (NSL 40 to NSL 100): casing gasket sets, shaft sleeves, wear rings and overhaul kits by pump size, plus ROTAN gear-pump gear sets — and the nameplate data a quotation needs.
Consumables and service parts for biological marine sewage treatment plants: corrugated-PVC biofilter media by person-equivalent rating, return-sludge diaphragm-pump kits, chlorine sensor cells and UV-C quartz sleeves — what fits what, and how to order for IMO MEPC.227(64)-era plants.
Service parts for Alfa Laval MAPX and MOPX marine separators: bowl gasket kits, disc stacks, gravity disc sets, friction pads and spindle assemblies — what each does, which sizes the catalogue lists, and the data a purifier-spares quotation needs.
Which socket fits which plug-in relay: the pin-count logic (8-pin = 2 changeover, 11-pin = 3 C/O, 14-pin = 4 C/O), the Omron MY/LY and Schneider Zelio RXM pairings with their coil-code letters, hold-down clips, and the wiring habits that prevent miswired bases.
Why one contactor carries two different ampere ratings (AC-1 for resistive loads, AC-3 for motors), how to size against the motor's full-load current, the coil-voltage codes across TeSys, SIRIUS and ABB AF, and the auxiliary-contact and coordination details that decide whether a starter survives a fault.
How MPCBs combine an adjustable thermal overload with a fixed magnetic short-circuit trip, why selection is by setting range around the motor's full-load current, and the frame logic of the three dominant families — Schneider GV2ME, Eaton PKZM0 and Siemens 3RV2 — with stocked examples per range.
The four RCD types and the residual-current waveforms each can actually detect, why frequency converters and EV chargers demand Type B, the 30 mA / 300 mA sensitivity split, what the Nordic HPFI and PFI labels mean, and the RCCB-versus-RCBO decision — with stocked examples of each class.
Choosing between screw-clamp, tension-spring and push-in terminal blocks, how block sizing follows conductor cross-section, earth blocks and multi-level variants, the jumpering and marking accessories that complete a rail — across the stocked WAGO TOPJOB S and 285, Phoenix UT, Weidmüller W-series and Schneider NSYTRR ranges, plus where WAGO 221 lever connectors fit.
How the modular 22 mm pushbutton systems work — head, mounting collar and snap-on contact blocks ordered separately or as complete units — what separates Harmony XB4 from XB5 and SIRIUS 3SU1 from Eaton's M22/RMQ line, and the non-negotiable rules for emergency-stop devices: latching, NC positive-opening contacts and release by twist, pull or key.
How sensing range follows barrel size (M8 through M30), what flush versus non-flush mounting costs in range, the PNP/NPN and NO/NC wiring decision, reading Turck and Telemecanique type codes, target-material correction factors, and when a capacitive sensor is the right tool instead.
Reading lug references as conductor-size-slash-stud-hole, when a crimped copper tube lug beats a range-taking shear-bolt connector, why wire-end ferrule colours cannot be trusted across brands (two rival colour systems), twin ferrules, strip lengths and the crimp-tool matching rules.
Sizing a switch-mode 24 V DC supply with real headroom, why boost or power-reserve ratings matter for valve and motor loads, single-phase versus three-phase input, enclosure-temperature derating, paralleling and redundancy modules, and when a DC-UPS belongs in front of the PLC — with stocked Phaseo, SITOP, QUINT and Mean Well examples.
Choosing a limit switch by actuator head (roller lever, plunger, adjustable rod), body format and contact action — snap versus slow-break, and why positive-opening NC contacts are the safety requirement — across the stocked Telemecanique XCKJ/XCMD and Siemens SIRIUS 3SE5 modular ranges, plus when to go non-contact instead.
IMO MEPC.107(49) compliance guide for the 15 ppm bilge separator (oily-water separator, OWS), the 15 ppm bilge alarm and the automatic three-way stopping valve required under MARPOL Annex I Regulation 14 on every ship of 400 GT and above. Lists what the resolution requires of the equipment (15 ppm effluent limit under all conditions, independent alarm actuation, three test-fluid families, rated-capacity envelope, manufacturer's identification plate), what has to be on board (type-approval certificate for both OWS and alarm, IOPP Supplement, Oil Record Book Part I, operating manual, monthly alarm test log) and the three most common port-state survey findings.
A4 fillable hose pressure test certificate + periodic hydrostatic test procedure for marine cargo, ballast, bunker and drop hoses to OCIMF and EN ISO 7233 / EN 1765. Captures hose identification (serial, manufacturer, bore, length, rated WP, test P = 1.5·WP, burst P, end fittings), test details (date, temperature, hold ≥ 5 min, elongation, twist, electrical continuity) and signed pass/fail. Procedure covers periodic interval (6 mo cargo/bunker, 12 mo ballast/stores), pre-test inspection, fill and vent, pressurisation and continuity measurement for OCIMF bonded hoses.
Side-by-side chemical compatibility chart for Greene, Tweed Chemraz 505 and DuPont Kalrez 6375 FFKM O-rings against 18 industrial and petrochemical media. A/B/C/D rating with notes on where the two grades diverge (Chemraz preferred for amines / EO / wet Cl2 / SC1; Kalrez preferred for hot steam).
Cross-references the most-used industrial fastener standards from DIN (Germany, legacy), ISO (international), and ASME B18 (United States). Covers hex head cap screws (DIN 931 / 933 vs ISO 4014 / 4017 vs ASME B18.2.1), socket head cap screws (DIN 912 vs ISO 4762 vs ASME B18.3), nuts (DIN 934 vs ISO 4032 vs ASME B18.2.2), washers (DIN 125 vs ISO 7089 vs ASME B18.22), thread pitch (metric coarse vs fine, UN / UNC / UNF), property class (8.8, 10.9, 12.9 vs A2-70, A4-80, ASTM A490), and torque calculation from bolt class.
Load cell selection reference for industrial weighing: strain-gauge (bonded foil), compression (canister, disk), tension (S-beam, in-line), single-point (platform scale), shear-beam, double-ended shear-beam (weighbridge), and hydraulic. Includes OIML accuracy classes (C3, C4, C6), IP rating relevance, temperature coefficient, output signal (mV/V vs digital), and cable / summing-box wiring diagrams for 4-load-cell and 6-load-cell installations.
Reference for the ongoing transition from high-GWP HFC refrigerants (R404A, R507A, R410A, R134a) to lower-GWP HFO blends (R448A / Solstice N40, R449A / Opteon XP40, R452A / Opteon XP44, R454B, R32) required by EU F-Gas Regulation 517/2014 and UNEP Kigali Amendment schedules. Includes drop-in compatibility notes for expansion valves, filter driers, oils (POE 32 / 68 / 170) and system charge adjustment.
Cable tray, ladder tray and mesh basket standards comparison between European (EN 61537 / IEC 61537), North American (NEMA VE 1 / NEMA VE 2) and offshore (NORSOK M-501 coating). Covers load-class designation (SWL — Safe Working Load), support spacing, safety factor, corrosion coating options (pre-galvanised, hot-dip galvanised BS EN ISO 1461, magnelis, stainless 304 / 316), fire-integrity classification, and side-rail depth vs span selection tables. Includes translation between EN 61537 numeric class (5, 6, 8, 10, 12, 15, 20, 30) and NEMA VE 1 alphabetic class (A, B, C).
Decodes the two-digit IP (Ingress Protection) rating per IEC 60529: first digit identifies solid-body / dust ingress protection (0 to 6), second digit identifies water ingress (0 to 9K). Includes the IK impact-resistance code (IK00 to IK10) and the industry-specific NEMA Type equivalents used in North America. Written for specifying enclosures, cable glands, luminaires, sensors and switchgear in industrial and marine service.
Reference table of the most-used HS codes for marine and industrial parts under the WCO Harmonised System 2022 nomenclature. Covers bearings (8482), pumps and compressors (8413, 8414), valves (8481), electric motors and drives (8501, 8504), electrical apparatus (8535, 8536, 8537, 8544), instruments (9026, 9027, 9032), fasteners (7318), gaskets and seals (4016, 8484), refrigeration components (8415, 8418), and safety equipment (6203, 6506, 8531). Includes chapter-note references and origin-rule tips relevant to EUR.1 / GSP declaration.
How marine equipment gets and keeps class-society type approval from the five IACS members most commonly asked for on merchant fleets: DNV (Norway), ABS (USA), Lloyd's Register (UK), Bureau Veritas (France), and ClassNK (Japan). Covers the type-approval application flow, the difference between type approval and product approval, unit certificates (Form 3, PCoC), scope-of-approval limits, and how to keep the certificate current across firmware releases and material changes. Written for buyers verifying that a delivered spare part is covered by the vessel's classification survey.
IE motor efficiency class reference (IEC 60034-30-1: IE1 Standard, IE2 High, IE3 Premium, IE4 Super-Premium, IE5 Ultra-Premium). Includes the EU MEPS 2019/1781 timeline that made IE3 mandatory in Europe from 1 July 2021 and IE4 mandatory for 75-200 kW motors from 1 July 2023. Also decodes the motor nameplate efficiency at 100%, 75% and 50% part-load, plus the impact of VFD supply on effective efficiency.
Circuit breaker coordination and selectivity for low-voltage industrial installations. Covers the three coordination strategies — full selectivity, partial selectivity, and cascading — and how to read manufacturer selectivity tables. Includes worked examples for MCB-MCB, MCCB-MCB, and ACB-MCCB combinations at prospective short-circuit currents up to 50 kA.
Compressed air treatment system components explained: air receiver sizing, refrigerated vs desiccant dryer selection, coalescing and particulate filters, condensate drain types, and the ISO 8573-1 air quality class matrix (solids, water, oil).
Compares three dominant industrial sensor communication methods: 4-20 mA current loop (NAMUR NE 43), HART digital-on-analogue (Highway Addressable Remote Transducer), and IO-Link (IEC 61131-9 point-to-point digital). Covers wiring topology, cable-length limits, diagnostics visibility, hazardous-area compatibility, and the ROI case for migrating a plant from 4-20 mA to IO-Link.
Low-voltage cable sizing procedure per IEC 60364-5-52. Covers current-carrying capacity (Iz) tables for common installation methods (buried, on tray, in conduit, in wall), correction factors for grouping and ambient temperature, voltage drop calculation, and short-circuit thermal withstand. Includes reference tables for PVC and XLPE insulated copper cables from 1.5 to 240 mm².
Reference for hazardous-area zoning and equipment marking under the ATEX Directive 2014/34/EU (Europe) and the IECEx scheme (international). Decodes the zone designations (Zone 0, 1, 2 for gas; Zone 20, 21, 22 for dust), gas groups (IIA, IIB, IIC + IIIA-C), temperature classes (T1-T6), and the two-part equipment marking: category code (II 1G, II 2G, II 3G) plus protection code (Ex db IIB T4 Gb etc.).
Marine engine cooling water loop design — central-cooling architecture with seawater (SW) high-temperature loop feeding a plate heat exchanger to a freshwater (FW) low-temperature loop. Covers material selection (titanium plates for SW, 316L for FW), water treatment chemistry (nitrite inhibitor, molybdate, glycol), expansion tank sizing, pump duty (SW centrifugal + standby, FW centrifugal + standby), and IACS UR M53 redundancy requirements.
Marine bilge water treatment reference — oily-water separator (OWS) design, IMO MEPC.107(49) 15 ppm discharge standard, MARPOL Annex I logbook requirements, and the interaction between OWS, 15 ppm bilge alarm and 3-way discharge valve. Covers coalescing plate, gravity settling, and hollow-fibre membrane OWS technology.
Marine fuel oil (MFO) viscosity control system reference. Covers ISO 8217 grades (MDO / MGO / HFO 380 / VLSFO), injector-inlet viscosity target (typ. 10-15 cSt at engine inlet), fuel oil viscosity controller with pilot-operated 3-way steam mixing valve, and the role of the fuel homogeniser in blending residual and distillate fuels during grade change-over.
Cathodic protection (CP) reference for marine and industrial steel structures. Compares Impressed Current Cathodic Protection (ICCP) against sacrificial (galvanic) anode systems. Covers alloy selection (zinc, aluminium, magnesium), current density design per DNV-RP-B401, reference cell types (Ag/AgCl, Cu/CuSO₄, Zn), and typical anode consumption rates.
Cargo hose pressure testing practice under OCIMF GMPHOM 2009 and BS EN 1765: factory hydrostatic test at 1.5× rated working pressure (RWP), 2× RWP burst test on prototype, 5× RWP minimum burst on production, electrical continuity (bonded and non-bonded/insulating hose types), vacuum test at 250 mmHg (10 in Hg), length change and elongation records. In-service test intervals per OCIMF ship-to-ship transfer guidance and terminal operator practice. Certificate content, retention period and IOPP record-keeping. Applicable to marine bunker hoses (BS EN ISO 1825), cargo hoses (BS EN 1765) and offshore mooring hoses (OCIMF GMPHOM 2009).
Danfoss product code decoder — every industrial code family. Prefix explanation across all Danfoss divisions: refrigeration valves (003Z AB-QM PICV, 032F EVR solenoid, 068Z TEX/TQ expansion, 023U EEV), HVAC (065Z VRB balancing valves, 065B VRG rotary mixing, 013G RA-N radiator, 084H ETS electronic temperature), pressure switches (017B BCP boiler, 060G KP2/KP7 refrigeration, 060H DST industrial), controllers (084H EKC/EKF, 080Z AK2), drives (132B/F VLT FC series, 175/176 automation drives), and industrial (148B PVG proportional, 011L RA-C). Includes typical part-number breakdown, obsoleteness/legacy notes, and cross-links to cBallast product pages.
Property classes of metric fasteners with the numbers behind the marking: nominal and minimum tensile strength, yield or 0.2 % proof stress, proof stress, Vickers hardness range and typical material for classes 4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 9.8, 10.9 and 12.9 (ISO 898-1); matching nut classes 4 to 12 and thin-nut classes 04/05 (ISO 898-2); stainless steel groups A1–A5 with property classes 50, 70 and 80 (ISO 3506-1); how to read the head marking; and a proof-load table for 8.8, 10.9 and 12.9 from M5 to M36.
One-page metric thread reference: coarse pitch and common fine pitches for M1.6 to M64 (ISO 261/262), tapping drill diameter for the coarse pitch (d − P), clearance-hole diameters for fine, medium and coarse fits (ISO 273), tensile stress area As for strength calculations, plus tolerance classes (6g/6H, 6e, 6az/6ax), thread engagement rules for steel, cast iron and aluminium, when to use fine pitch, ISO 1478 tapping-screw (ST) sizes, and the difference between G, R and NPT pipe threads.
Assembly preload and tightening torque for metric coarse-thread bolts M4 to M36 in property classes 8.8, 10.9 and 12.9 at 90 % utilisation of the minimum yield stress, for total friction coefficients µ = 0.12 and µ = 0.14 (VDI 2230 basis), a stainless A2-70 / A4-70 table at reduced utilisation, and the rules that make the numbers valid: friction dominates, lubrication and finish change torque by 30–50 %, hot-dip galvanised joints tighten by turn-of-nut, calibrated tools (ISO 6789), re-use limits for 10.9 and 12.9, and how prevailing-torque nuts add to the reading.
Using acid test kits on POE and mineral oil systems, interpreting results, and the full burn-out clean-up sequence — suction and liquid driers, oil changes, retests — that lets a replacement compressor survive, with the stocked ETK/TKO kits and drier families.
The parts that make a Carel EEV loop work: E2V valves and 90-bar versions, E3V for CO2 at 140 bar, replaceable stators and cables, orifice inserts, inlet strainers, the EVD Evolution driver family and the transformer and probe set every installation needs.
Navigating wrought copper solder fittings in ACR sizes: C and FTG end types, the 9600-series couplings and 9607/9606 bends, fitting reducers, adapters female-solder to NPT, and why oil traps (9698 series) belong at the base of suction risers — with sizes stocked from 1/4 to 3 1/8 inch.
Choosing a compact axial fan for cabinet cooling and refrigeration electronics: frame sizes 60 × 60 to 127 × 127 mm, AC versus DC supply, airflow classes, and which stocked ebm-papst models (612 NGME, 8414N, 8850N, 3956, 4312, 4580Z) and generic frames match.
Where an electronic controller (Eliwell IDNext/ICPlus/SmartCella) replaces mechanical controls, where Penn A19 thermostats and P77 pressure switches remain the right answer, service-thermostat stop-gaps, and how the two worlds combine on a sound cold-room panel.
Designing rope-pull e-stop runs along conveyors: how constant-tension rope switches trip on pull and on slack, single- and double-sided spans to 2 × 100 m, reset and indicator options, and the tensioners, bellows, pull-rope and status accessories stocked for the XY2C family.
How Frascold's model letters (A, B, D, Q, S, V, Z, W) map to the spare parts families — valve plates, head and valve-plate gaskets, capacity-control solenoid heads, junction boxes, oil pumps, sight glasses and rubber mounts — using the T00S/T00SK kit numbers stocked in the catalogue.
Choosing between ethylene glycol (Dowcal 100 class) and propylene glycol (Dowcal 200 class) for secondary cooling circuits, how concentration sets freeze protection and penalises pumping, why inhibited fluids and not automotive antifreeze belong in process circuits, and commissioning checks.
Decoding the two IP digits honestly — dust versus water, jets versus immersion versus steam — why IP67 is not automatically better than IP66 outdoors, cable glands and caps as the real weak points, and stocked examples from sensors to controllers at each class.
Why transcritical CO2 pipework uses K65 copper-iron alloy instead of standard copper, which pipe sizes and fitting types the system covers (couplings, elbows, tees, reducers, caps to 130 bar), and the brazing and nitrogen-purging practice the joints require.
What the Kriwan INT69 family protects against (winding temperature, phase failure, short-cycling), matching the module to the compressor frame group, the INT69TML version for the large V/Z/W frames with the INT250 oil monitor, and reading out trip history with the Diagnose interface kit.
Installing air-conditioning and heat-pump line sets that last: choosing pre-insulated copper pipe pairs (1/4+3/8 to 3/8+5/8), dressing them in 70×55 and 90×65 line-set duct with the matching bends, joints and wall terminals from the catalogue, and sealing penetrations.
How to identify the right spare for an LU-VE commercial unit cooler: which fan motor, blade, guard grille, motor bracket, front cover and defrost rod belongs to the F27HC, F30HC/F31HC, F35HC, S2HC/S3HC and SHA/FHA families, using the part numbers stocked in the catalogue.
The standard pinouts behind M8 and M12 sensor cabling — 3- and 4-pin M8, 4- and 5-pin A-coded M12 — the colour convention (brown/blue/black/white), when to choose angled versus straight and field-wireable versus moulded, and fault-finding sensor circuits with a meter.
Building the onboard spares inventory for provision plants and reefer systems: the failure-ranked parts list (controls, driers, valves plates, gaskets, fan motors), sea-water-specific items, documentation that satisfies class and PSC, and how quote-to-invoice sourcing consolidates mixed-OEM baskets.
Flame-free joining of refrigeration copper with the Conex Bänninger >B< MaxiPro press system: available fitting shapes and pack sizes in the catalogue, the jaw-and-tool workflow, where press joints are allowed, and inspection practice.
Orientation in the stocked MHI equipment: Kazan and Kazan Arctic wall-mounted heat-pump sets (SRK indoor / SRC outdoor), SCM multi-split outdoor units, the ducted and cassette FD families (FDU/FDUM/FDT/FDTC/FDE/FDF), R32 practice and the panels and filter kits that complete an installation.
What happens inside a refrigerant line brazed without nitrogen, the purge flow that prevents it, how to rig a purge from a nitrogen regulator through charging hoses with the catalogue's BSP-to-flare adapters, and pressure-test practice after the torch work.
A field-by-field decode of OsiSense XS inductive sensor designations — series, barrel size, body style, output technology, PNP/NPN, NO/NC and connection — so a worn sensor label or a competitor cross-reference resolves to the right replacement.
Where EN 378 requires relief valves on refrigeration vessels, how a set pressure is chosen against the design pressure, why dual relief valves on a three-way changeover (Henry SDK type) are fitted on plants that cannot be pumped down, and the catalogue's stocked set pressures from 16.2 to 27.6 bar plus CO2-class devices.
When to use an electronic heated-diode/infrared detector, UV tracer dye or bubble solution for refrigerant leak search, what sensitivity classes mean under EN 14624 and the F-gas inspection regime, sensor replacement practice (Inficon D-TEK, TIF), and a structured search routine that actually finds the leak.
The rotalock sizes used on compressors, receivers and accumulators (3/4-16 to 2 1/4-12 UNF), which solder line size each stocked valve and adapter pairs with, straight versus angled patterns, and the PTFE gasket sizes to renew at every disturbance.
The flare joint done right — cut, deburr, correct projection, torque — and a reference to the brass fitting designation system stocked in the catalogue: U1 half-unions, U2 unions, UR2/UR3 reducers, US4/US5 swivels, N5/NS4 nuts, P2/P3 plugs, E1/E2 elbows and T2 tees.
Interlocking movable guards per ISO 14119: tongue (key) operated safety switches, solenoid-locked versions that hold the door until the hazard stops, coded magnetic switches that resist defeat, actuator keys and sliding-bolt accessories, with the stocked XCS/XCSDM range.
Selecting an electro-sensitive protective device: what Type 4 means (IEC 61496), choosing finger (14 mm), hand (30 mm) or body resolution, protected height versus the stocked XUSL4E ladder (160–1810 mm), the minimum-distance formula from ISO 13855, and the mirror-column, floor-base, cover and test-rod accessories.
Building and maintaining gauge access on refrigerant circuits: Schrader core discipline (caps are the seal), couplings and tees with brazed-in ports, service valves, temporary piercing valves and the core-removal tool that lets cores change without losing the charge.
What the silver percentage of a brazing rod buys in a refrigeration joint, when a self-fluxing copper-phosphorus rod is enough, when flux-coated high-silver rod is mandatory (brass, steel, vibration, food plants), and the joint preparation and nitrogen purge that make the braze survive.
Why a suction-line accumulator protects the compressor on heat-pump, low-temperature and hot-gas-defrost plants, how receiver volume relates to system charge and pump-down, and the catalogue's vessel sizes from 1.5 to 22 litres (accumulators) and 10 to 50 litres (vertical receivers).
When ultrasonic sensing outperforms photoelectric — transparent targets, liquids, dusty air — with the stocked OsiSense XX range: Ø18 brass and M30 barrels, analogue 4–20 mA / 0–10 V distance versions, through-beam pairs and reflex types, plus mounting rules for sound.
Where to install a flexible vibration eliminator and where a discharge muffler, how the ITE M-05/M-10 and V-series catalogue items are sized, pressure-control damping loops, and the piping geometry that stops compressor pulsation breaking joints.
How a pressure-actuated water-regulating valve holds condensing pressure on water-cooled plants, selecting Penn V46 sizes 3/8" to 2", why sea-water service requires the bronze B-versions, setting procedure and the fouling maintenance that keeps them modulating.
What each EN 10204 inspection document type certifies, who signs it, when a 3.1 or 3.2 certificate is actually required, how heat-number traceability works, and what to check when a certificate arrives with the goods.
Which grease thickeners can be mixed and which must never meet, the NLGI consistency scale, base-oil compatibility, and the safe purge procedure when changing grease type in a bearing.
The real difference between AISI 304/A2 and 316/A4 stainless: composition, PREN, where each survives, when 316L is mandatory, duplex upgrades, and the equivalent designations across EN, ASTM and fastener classes.
What the leading groups in Siemens low-voltage order numbers mean — 3RT2 contactors, 3RV motor-protection breakers, 3RU/3RB overload relays, 3VA moulded-case breakers with their 3VA9 accessories, 5SL miniature breakers and 3SU1 pushbuttons — with worked examples from the catalogue and the checks that prevent a wrong panel part.
Reading Schneider Electric references: TeSys D contactors (LC1D + rating + coil code), LRD thermal overloads, GV2ME motor starters, Acti9 iC60N/H breaker grades and Compact NSX frames — with the published coil-voltage letter codes and catalogue examples.
What B, C and D curves actually trip at (3–5, 5–10 and 10–20 × In), how to choose for cable runs, motors and transformers, and the cross-reference between the big MCB families — ABB S200, Schneider Acti9 iC60 and Siemens 5SL — with breaking-capacity grades.
What each timing function actually does to the output contact, how multifunction units like Zelio RE22 and SIRIUS 3RP25 replace a drawer of single-function spares, the true-off-delay trap (timing without auxiliary supply), and the dedicated star-delta timer's transfer gap — with stocked examples.
Official Techcross OMSM for the Electro-CleenTM ballast water management system (ECS). Covers system overview, ballasting/deballasting procedures, electrolysis cell maintenance, TRO measurement, gas detection, neutralization with sodium thiosulfate, hazardous-area precautions and USCG / IMO MEPC.279(70) operating parameters.
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