Greene Tweed Chemraz 505 O-Ring

Greene Tweed Chemraz 505 perfluoroelastomer (FFKM) O-ring — universal-purpose chemical-process compound. Verified physical spec (Greene Tweed datasheet GT DS-US-FH-060 via Marco Rubber): Shore A 75 durometer (ASTM D2240), specific gravity 1.93 (ASTM D297), tensile strength at break 1,750 psi / 12.1 MPa (ASTM D1414), elongation at break 140 percent, tensile modulus 450 psi at 50 percent elongation / 1,150 psi at 100 percent, compression set 25 percent (ASTM D395, 70 h at 400 F, 25 percent deflection). Colour: black. Service temperature range: -30 C to +230 C (-22 F to +446 F). Chemical compatibility (per 505 datasheet): broad resistance to acids, caustics, aldehydes, esters, ethers, aromatics, hot water, steam, amines, methanol, ketones, TBA and MTBE. Chosen for mixed-media reactor and chemical-process duty where a single sealing compound must survive a variable-media chemistry. Generic FFKM limits (industry knowledge, not 505-specific): molten alkali metals and elemental fluorine — for those extreme services consult Greene Tweed for a specialised grade. Verified Chemraz compound family (per Greene Tweed Chemraz Compound Selection Guide and retailer datasheets): Chemraz 505 (universal chemical, 75A black, 230 C — this product); Chemraz 513 (80A white, semiconductor dry-process); Chemraz 520 (90A white, semiconductor dry-process); Chemraz 526 (rapid-gas-decompression / sour-service grade, -20 C to +250 C — oil-and-gas downhole and completion applications); Chemraz 541 (universal high-strength black, -16 C to +230 C); Chemraz 555 (high-temp, continuous ~316 C); Chemraz 562 (ultimate high-temp, -12 C to +316 C / 600 F); Chemraz 584 and 585 (strong-oxidiser / hot-aqueous; 585 is white and FDA / USP Class VI per Marco Rubber datasheet); Chemraz 600 (-20 C to +260 C); Chemraz 615 (up to ~325 C / 620 F); Chemraz 629 (aggressive O2 / F2 plasma); Chemraz 694 and G57 (current Greene Tweed menu). Additional grades referenced in industry literature (527, 570, 605, 615CR, 626, 660, K600, ULP60, 1500 series) NOT independently verified in this research pass — confirm per-grade spec with Greene Tweed before ordering for critical service. Cross-reference to DuPont / Chemours Kalrez (verified via matweb, dymseal, angst-pfister and Marco datasheets): Kalrez 6375 (75A black, max 275 C, general chemical service — the CLOSEST direct Chemraz 505 analogue), Kalrez 4079 (max ~316 C, low-compression-set general purpose), Kalrez 3018 (max ~288 C, aerospace / organic-acid service), Kalrez 7075 (max ~327 C, low-set hydrocarbon service). Kalrez 0090 is an RGD-oriented grade (max ~250 C); Kalrez 8085 and 8475 exist in DuPont product listings but per-grade Shore A and max-temp values were not confirmed in this pass. Cross-reference to Freudenberg Simriz: Simriz 495 is the closest general-chemical analogue for Chemraz 505. Simriz 481 = low-temperature; Simriz 484 = FDA / USP Class VI / 3-A (food and pharma); Simriz 485 = chemical-resistant; Simriz 486 = white pharma / semi; Simriz 498 and 498+ = top thermal-chemical grades (Simriz 498 verified -6 to +325 C / 23 to 617 F) — 498 is Simriz's ULTIMATE HIGH-TEMP, NOT the closest 505 analogue (that is 495). Cross-reference to Solvay / Precision Polymer Engineering (PPE) Perlast: Perlast family rated up to ~350 C (662 F). Perlast G75B verified 0 to +327 C, G75LT down to -46 C. Named 'Super-Six' set is G77X / G75B / G74S / G80A / G75LT / G90LT. G74LT, G80B, G80B+, G82 and G92T are referenced by distributors but per-grade specs were not confirmed in this pass. NOTE: Perlast is manufactured by Solvay / Precision Polymer Engineering (PPE), NOT by Dyneon (Dyneon is 3M's fluoropolymer division and does not make the Perlast line). Applications (verified from Greene Tweed Chemraz page and Chemraz 505 datasheet): chemical processing (mechanical seals, valves, pumps, reactors, mixers, sampling and metering equipment, instrumentation), aerospace fluid handling, analytical instrumentation, mixed-media reactor duty. NOT primarily for semiconductor plasma etch (use Chemraz 513 / 520 / 629 / SSD grades instead) and NOT primarily for oil-and-gas RGD / sour service (use Chemraz 526 instead). Standard sizes: AS568 imperial dash numbers -003 through -395; ISO 3601 metric size range. Greene Tweed and authorised distributors (Global O-Ring, Canyon Components, Marco Rubber) supply the full AS568 range plus custom-moulded sizes; which specific dash numbers Greene Tweed keeps as finished stock vs mould-to-order is not published on the public site — request stock status per size at RFQ. Certifications: Chemraz 505-specific USP Class VI / FDA 21 CFR 177.2600 / EU 1935/2004 / NORSOK M-710 / NACE MR0175 (ISO 15156) claims were NOT confirmed on the retrieved 505 datasheet. Chemraz 585 IS the confirmed FDA / USP Class VI white grade in the Chemraz range; Chemraz 526 IS the recognised RGD / sour-service grade. Do NOT specify Chemraz 505 for regulated food, pharma, or NORSOK/NACE sour-service applications without a Greene Tweed compliance letter confirming the specific batch or grade. cBallast supplies the full Chemraz range plus Kalrez, Simriz and Perlast cross-brand equivalents in AS568 or metric ISO 3601 sizes. Request a quote by AS568 dash number (or ID x CS metric), the specific chemical / temperature service, and any regulatory certification requirement (FDA / USP / NORSOK / NACE — we will steer you to the correct GRADE, not just the closest interchange).