... GB/T 12221-19895) Pressure test: GB/T 13927-1992; JB/T9092-1999Material for main partsBody: Cast iron, stainless steel, Cr ... more and tighter. With reliable sealing ability and no leakage.c.High pressure resistant, corrosion resistant, wear resistance long lifetime.Dimensions ... .522.5F251000300200.52541885.522.5F301200300200.52952285.522.5 D343H-C.P Flanged Multi-layer Metal-to-metal Butterfly Valve