Wafer-Type Check Valve,Double disc check valve nps:2"-36" pressure:CLASS150-2500LB temperature:<425C design &manufacture: API 594 API 6D face-to-face: API594 API 6D DIN3202 flange end:DIN 2543-2548 API605 ASME B 16.47 ANSI B 16.5 inspection and test: API 598 materials:WCB WCC LCB LCC WC6 WC9 C5 C12 CF8 CF8M CF3 CF3M CF8C CN7M