CAST STEEL PRESSURE SEAL COVER     Features Hawa Valves Pressure Seal Check Valves have been designed to meet the requirements of BS 1868/ASME B 16.34 Face to Face and End to End dimensions conform to ASME B 16.10 / ISO 5752 / BS 2080 / DIN End flange dimensions conform to ASME B 16.5 / ISO 7005-1 / API 605 / BS 3293 / DIN Butt weld end dimensions conform to ASME B 16.25 The Seat-rings are satellite faced cylindrical bottom seated type having ample cross section for strength are securely welded in place The gasket design ensures self sealing under pressure The inner row of studs establish the initial seal of the Pressure seal joint Valves meet the requirements of fugitive emission levels Shell category B as per MESC SPE 77/312 Options Tilting disc design available Check Valves can be supplied with counter weight or dash pot arrangement Full opening, piggable design available Can be supplied with "GRAYLOC END HUB", under project license from GRAYLOC PRODUCTS ®, UK. Materials Part Name Material Option Body ASTM A 216 WCB / A 217 WC6 / A 217 WC9 / A 217 C5 / A 217 C12 / A 351 CF8 / A 351 CF8M / A 351 CF3 / A 351 CF3M / A 352 LCB Cover ASTM A 216 WCB / A 217 WC6 / A 217 WC9 / A 217 C5 / A 217 C12 / A 351 CF8 / A 351 CF8M / A 351 CF3 / A 351 CF3M / A 352 LCB Disc @ ASTM A 216 WCB / A 217 WC6 / A 217 WC9 / A 217 C5 / A 217 C12 / A 351 CF8 / A 351 CF8M / A 351 CF3 / A 351 CF3M / A 352 LCB Hinge ASTM A 216 WCB / A 217 WC6 / A 217 WC9 / A 217 C5 / A 217 C12 / A 351 CF8 / A 351 CF8M / A 351 CF3 / A 351 CF3M / A 352 LCB Hinge Bracket ASTM A 216 WCB / A 217 WC6 / A 217 WC9 / A 217 C5 / A 217 C12 / A 351 CF8 / A 351 CF8M / A 351 CF3 / A 351 CF3M / A 352 LCB Hinge Pin ASTM A 276 410 / A 276 304 / A 276 304L / A 276 316L Seat Rings @ ASTM A 216 WCB / A 217 WC6 / A 217 WC9 / A 217 C5 / A 217 C12 / A 351 CF8 / A 351 CF8M / A 351 CF3 / A 351 CF3M / A 352 LCB Seat Rings@ ASTM A 216 WCB / A 217 WC6 / A 217 WC9 / A 217 C5 / A 217 C12 / A 351 CF8 / A 351 CF8M / A 351 CF3 / A 351 CF3M / A 352 LCB Back Up Ring ASTM A 216 WCB / A 351 CF8 / A 351 CF8M Thrust Ring ASTM A 216 WCB / A 351 CF8 / A 351 CF8M Disc Nut Carbon Steel / Stainless Steel Washer ASTM A 193 GrCarbon Steel / Stainless Steel Gasket Soft Iron / SS 304 / Graphoil Studs / Bolts ASTM A 193 Gr B7 / A 193 Gr B7M / A 193 Gr B8 / A 193 Gr B8M / A 320 Gr L7 Nut ASTM A 194 Gr 2H / A 194 Gr B7M / A 194 Gr B/ A 194 Gr 8M / A 194 Gr 4/7 * Valves are available in Duplex & Super Duplex Stainless Steel and Nickel Aluminium Bronze. Please indicate Trim required and ask for individual technical data sheets provided separately for these special materials. @ CS & Alloy Steel Wedges and Seat Rings will be overlayed with 13% CR. or STELLITE 6 as per customer specifications.

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