Swing Check Valve Size:DN50-DN500 PN: CL150-CL2500 API6D Design 1.Design ... flange ends to ANSI B16.25 standard(b)interal thread(c)external thread(d) welding(e)twin-clip(f)clip(g) cutting ... , A105,WCC,WCA, LCB,LCC;alloy steel:WC6,WC9,:cast stainless steel CF3,CF8,CF3M,CF8M; forged stainless steel :304,316,304L,316L;Cr5Mo,1Cr18Ni9Ti ...