China valve factory JONLOO supplies Big Check Valve Swing Type RF 20 INCH 600LB
Details:Size: 20 Inch.Pressure: 600 LB. Body/Bonnet: ASTM A216 WCB. Disc: ASTM A216 WCB+13CR. Seat: ASTM A105+13CR. Standards:Design and Manufacture:API 6D / BS 1868Face to face: ASME B16.10Flanged ends: ASME B16.5Inspection and testï¼ API 598 / API 6D