Swing Check Valve Size:DN50-DN500 PN: CL150-CL2500 API6D Design 1.Design and manufacture per ANSI B16.34 and API6D or BS 1868 standardFace to face dimensions per ANSI B16.10 standardEnd 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 standardPressure test per API598 standardNominal pressure class 150-2500lbNominal ...