petro Chem ValVes - Premier Valves

steel check valves27StandardsDesign and ManufactureCast Steel Check valve to BS 1868, ASME B16.34 and API 6DForged Steel Check valve to API 602Inspection and TestAPI 598 or API 6DEnd Flange DimensionASME B16.5 (for NPS≤24); ASME B16.47 series B, API 605 orASME B 16.47 series A, MSS SP-44 (for NPS>24)BW end dimension ASME B16.25Socket-weld dimension ASME B16.11Face to Face/End to End ASME B16.10Pressure Temperature ratings ASME B16.34Wall thickness dimension API 600 and BS 1868The Features of Check ValveBolted bonnet, swing and lift disc,metalic seating surfaces.Body and Bonnet ConnectionThe body and bonnet of Class 150 - Class900 Check valves are usually with studsand nuts. The body and bonnet of Class1500 - Class 2500 check valves areusually of pressurised seal design.Body-to-Bonnet JointStainless steel and flexible graphite woundedgasket is used for Class 150 Class 300 andClass 600 check valve. Joint gasket is alsooptional for Class 600 check valve; Ringjoint gasket is used for Class 900 checkvalve; Pressurised seal design is used forClass 1500 - Class 2500 check valve.SeatFor carbon steel check valve the seat isusually forged steel. The sealing surfaceof the seat is spray welded with hard alloyspecified by the customer. Renewablethreaded seat is used for NPS≤10 checkvalves, and welded on seat can also be anoptional if so requested. Welded on seatis used for NPS≥12 carbon steel checkvalve. For Stainless steel check valve,integral seat is usually adopted, or to weldhard alloy directly integrally. Threadedor welded on seat is also optional forStainless steel check valve if requested.The illustrations in this catalogue are subject to modifications without notice.premierP.O. Box 11735, Randhart, South Africa, 1457sales@premiervalves.co.zavalves (Pty) LtdT +2711-908-3760 F +2711-908-1268www.premiervalves.co.za