... 304/316 stainless steel Thread Check Valve 1.Investment casting technology 2.CNC lathe processed 3.SS304,SS316,CF8/CF8M, 304/316 stainless steel Thread ... valves series: 1pc,2pc,3pc ball valve,flanged end ball valve,gate valve,check valve,globe valve,Y-strainer,sanitary valve etc.3.Quick coupling: type A, ... the cooperative relation of equal mutual benefit . 304/316 stainless steel Thread Check Valve