... -C.P. Wafer Resilient Metal-to-Metal, Butterfly Valve D73H-C.P. Wafer Resilient Metal-to-Metal, Butterfly Valve Adoption Standard1) ... 9115.1-2000; GB/T 9115.2-20004) Face to face: GB/T 12221-19895) Pressure test: GB/T ... test0.60.60.6Applicable mediumWater, steam, oil products, corrosive acid, etc.Applicable Temperature-29°C~425°C DNSizeΦDΦ ... 522.5 D73H-C.P. Wafer Resilient Metal-to-Metal, Butterfly Valve