Detailed Product Description BALL CHECK VALVE Material:Body:Cast iron/Ductile ironBonnet:Cast iron/Ductile ironBall:NBR/EPDMBonnet gasket:NBR/EPDMScrew & Bolt:Steel with zincTestWorking pressure:16BARSShell test pressure:24BARSSeat test pressure:17.6BARSRemark:Our design can be suitable for all standards:BS,DIN,ANSI,JIS,etc.