Size - 15mm to 50mm Application - Oil And Gas, Refinery, Petrochemical, Steel Sectors,Power, Spring - SS 302 Gasket - Spiral wound SS type 304 with graphite filler Class - 800 Cap Screws - ASTM A193 Gr. B7 Identification Plate Aluminium (anodised) Face to Face - AWE B 16.10 Testing Std. - API S98 Mfg. Std. - AP1602, BS 5352 Body - ASTM A105, in-situ stellited seat Cover - ASTM A105 Piston Disc - ASTM A276 Type3 04 Efficient name in the industry involved in offering the optimum quality of Forge Steel Check Valve.