The API standard check valve produced by our company is designed and manufactured in full accordance with American standards, with beautiful structure and advanced. American standard check valve automatically opens and closes the valve disc depending on the flow of the medium itself, which is used to prevent the medium from flowing back to the valve, also known as check valve, check valve and countercurrent valve. Its main function is to prevent the medium from flowing back, reverse rotation of pump and driving motor, and release of container medium. VP鈥檚 API check valve can be divided into Swing check valve and Lift check valve API Check Valve Specification Size:2鈥潂48鈥?DN 50~DN 1200) Pressure:Class 150~Class 2500 End connection:RF,RTJ,BW,FF,Wafer,Lug Main material Casting Steel:WCB,WCC,WC6,WC9,LCB,LCC,CF8,CF3,CF8M,CF3M,CF8C,4A,5A,6A,CN7M,CW6MC, CW12MW,CU5MCuC,C5,C12,M35-1 Special Alloy Steel:Inconel,Hastelloy,Monel API Check Valve Standard and Features Std: 1.Design & manufacture:API 6D,BS 1868,ASME B16.34 2.Flange END:ASME B16.5,ASME B16.47 3.Face To Face :ASME B16.10 4.Pressure-temperature rating:ASME B16.34 5.Butt END:ASME B16.25 6.Inspection & Test:API 598 7.Also available per NACE MR 0175,NACE MR 0103 Feature: 1. Full bore or reduced bore 2. Bolted Cover,Pressure seal cover 3. Swing type,Lift type,Lug type,Wafer type 4. Renewable seat ring 5. Non-penetrate disc shaft 6. Horizontal or vertical service 7. Flanged ends or welded ends or wafer endslow price Check Valve website:http://www.valprovalves.com/check-valve/