piston check valve

piston check valve check valve is widely used in such fields as petroleum melting ,chemical induatry ,paper-making ,pharmaceutical industry ,food industry ,water poweer ,electric power,city planning ,steel,etc. Main specifiction Design and manufacture per ANSI B16.34 and API6D or BS 1868 standard Face to face dimensions per ANSI B16.10 standard End flange dimensions per ANSI B 16.5 Standard (1/2-24)or MSS sp44 or API605(28-30) Pressure temperature ratings per ANSI B 16.34 standard Pressure test per API598 standard Nominal pressure class 150-2500 Nominal diameter NPS1/ 2 -30 choose for customer1 size of NPS and size of class2 type of connection( a) flange(RF ,FM,M, ,TG ,FF,,RJ, SW,,BW, TH)R.F and R.T.J ype of connection flange ends to ANSIB16.5 standard or API605and MSS sp-44 standardB.W flange ends to ANSI B16.25 standard(b)interal thread (c)external thread(d) welding (e)twin-clip (f)clip(g) cutting sleave3 type of operation connection dimensions of worm actuator , gear actuator ,electric actuator ,pneumatic actuator , hydraulic actuator to ISO5210 standard 4 other equipmentanti-static construction "AS" and fire -resistant construction "FD"5 materialsaccording to ASTM carbon steel: WCB , 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,0Cr17Ni12Mo2Ti and so on