We manufacture check valve according to API, DIN, BS, GB/T standards. The types have swing check valve, dual plate check valve, piston check valve, tilting check valve etc. The materials are carbon steel WCB, WCC, stainless steel CF8, CF8M, CF3, CF3M, duplex steel 4A, high temperature alloy steel ASTM A217 WC1, WC6, WC9, C5 and C12 and also low temperature carbon steel likely A352 LCB, LCC, LC1, LC3 etc. Nominal diameter range from 2" to 36", pressure ranage from Cass 150# to Class 2500#.