Emerson ASCO Series 8210 general-service pilot-operated 2/2 solenoid valve, code 8210G002. 1/2 inch NPT brass body, 5/8 inch orifice, Cv 4 flow coefficient, two-way two-position normally closed configuration, pilot-operated diaphragm construction (requires minimum pressure differential to open). Diaphragm and disc-holder: NBR (Buna-N). Core assembly: PA (polyamide). Internal springs: 304 / 305 stainless steel. Operating pressure differential (verified distributor consensus, matches Emerson product page text): AC coil — 5-200 psi air/inert gas, 5-150 psi water, 5-135 psi light oil to 300 SSU; DC coil derates to approximately 5-125 psi air, 5-100 psi water, 5-100 psi light oil. Maximum fluid temperature: 180 degrees F (82 C) on AC coil, 150 degrees F (65 C) on DC coil. COIL SOLD SEPARATELY — the 8210G002 body ships without a coil so the operator selects the correct voltage and enclosure. Verified 6-digit coil part numbers (Class F insulation standard): 238210 (Class F, 6.1 W AC, general purpose lower-power), 238610 (Class F, 10.1 W AC — the most common 8210G002 spare replacement coil), 238710 (Class F, 11.6 W DC), 272610 (Class F, 16.8 W AC / 16.1 W DC), 99257 (Class F, 20 W AC / 20 W DC), 238910 (Class H, 11.6 W DC high-temperature), 501695 (Class F, 15.8 W). Explosion-proof (EF prefix) coil counterparts for Types 6, 6P, 7, 9 hazardous-area enclosures: 238214, 238614, 238714, 272614, 238914, 501696, 97617. ATEX/IECEx variants carry the EV prefix. Standard coil voltages: 24, 120, 240 and 480 V AC 60 Hz (or 110, 220 V AC 50 Hz); 6, 12, 24, 120 and 240 V DC. Standard enclosure: Emerson ASCO Red-Hat II Types 1 / 2 / 3 / 3S / 4 / 4X. Explosion-proof Types 6, 6P, 7 and 9 via EF prefix (hazardous locations). REBUILD KIT: Emerson ASCO 302273 (soft parts kit — covers 8210G001, 8210G002, 8210G012 body sizes and their EF, JKF and SC prefix variants). This is the highest-value spare a buyer will order alongside the valve itself for scheduled overhaul. MEDIA COMPATIBILITY: air, inert gas, water, and light oil to 300 SSU on the NBR seat. NOT compatible with aggressive chemicals, heavy oil, high-temperature steam, or oxygen — use Emerson ASCO Series 8262H oxygen-clean valves for O2 service. Series 8210 catalog-number (-Gxxx) decoder (verified from Emerson catalog Aug-2023 rev, sizes 3/8 through 1 inch NPT): 8210G001 = 3/8 inch NPT brass, orifice 5/8, Cv 3, NC, NBR; 8210G002 = 1/2 inch NPT brass, 5/8, Cv 4, NC, NBR (this product); 8210G003 = 3/4 inch NPT brass, 3/4, Cv 4.5, NC, NBR; 8210G004 = 1 inch NPT brass, 1, Cv 13, NC, NBR; 8210G015 = 3/8 inch NPT brass, 5/8, Cv 3, NC, NBR, high-pressure air (300 psi rating); 8210G030 = 1/2 inch NPT 304 SS body, NO variant, NBR; 8210G033 = 3/8 inch NPT brass, 5/8, NO, NBR; 8210G034 = 3/8 inch NPT brass, 5/8, NO, NBR with SS internals; 8210G035 = 1/2 inch NPT brass, 5/8, NO; 8210G036 = 3/8 inch NPT 304 SS body, NC (matches G073 body); 8210G087 = 1/2 inch NPT 304 SS body, NC; 8210G088 = 3/4 inch NPT 304 SS body, NC; 8210G093 = 3/8 inch NPT brass, low-flow / low-pressure NC, lead-free option; 8210G094 = 3/8 inch NPT brass, high-pressure NC; 8210G095 = 1/2 inch NPT brass, high-pressure NC; 8210G100 = 1 inch NPT brass, NC, high-pressure per catalog. 316L stainless subset: 8210G127, 8210G129, 8210G132, 8210G133 (for corrosive-service upgrade from brass). prefix variants (before the Gxxx): standard = brass, S = 304 stainless, SC = lead-free (potable water compliant), EF = explosion-proof, JKF = special build. Related Emerson ASCO series (line-mount 2/2, 3/2, 4/2): Series 8215 (largely a redesignation of 8210 for OEM channels); Series 8262 (compact direct-acting 2/2 for lower-pressure differential requirements — no minimum-pressure limitation); Series 8263 (larger direct-acting 8262-style); Series 8320 (3-way 3/2 for pilot / diverter / instrument service); Series 8262H (oxygen-clean variant for O2 gas service). Series 8210 is NOT a NAMUR-mount valve (line-mount only) — NAMUR-pattern actuator pilot valves are Emerson Series 551 and Series 553 spool valves. OWNERSHIP NOTE: ASCO has been Emerson (Emerson Automation Solutions) since Emerson acquired ASCO in 2017. Some distributor pages still miscredit Parker or Danfoss — these are wrong; ASCO valve technology is Emerson. Applications: general OEM machine build (water dispensing, air preparation, hydraulic pilot, glycol systems), industrial automation on/off fluid control, HVAC control valves, food and beverage process (upgrade to SC lead-free), chemical dosing (upgrade to 316L stainless G127-G133), and general clean-fluid on/off control up to the operating pressure envelope above. cBallast supplies the complete Emerson ASCO 8210 range plus matching separately-ordered coils (238610 most common spare, plus voltage variants and EF explosion-proof), rebuild kits (302273 for the 8210G001/G002/G012 body family, plus the wider 302xxx / 303xxx kit range for other body sizes), and Series 8262 / 8263 / 8320 sibling valves ex-EU stock with 24-72 h air-freight. Request a quote by valve body code (e.g. 8210G002) AND coil part number (e.g. 238610-024/DC for a 24 V DC common spare, or specify AC/DC + voltage separately if you want us to select the correct coil P/N).