DIN Lift Check Valve Cast Iron Check Valve Main parts and materials  Parts name material Bodyã??Bonnet Cast ironã??GG25 Disc A105+2Cr13ã??GG25+2Cr13 Seat Ring Stainless steel  Standards  Face to face Flange end DIN3202-F1 DIN2532/2533  Test  Nominal pressure Shell test Seal test 1.6 2.4 1.8