foot valve: 1.Material:cast iron 2.Size:50-500mm 3,pressure:PN16 foot valve1)Type:H42X-2.52)Norminal pressure:0.25Mpa3)Norminal diameter:DN50mm-DN500mm4)Suitable temprature:50°C5)Suitable medium:waterMaterial:1)Body: grey iron2)Cover: grey iron3)Disc: grey iron4)Seal ring: PTFE cast iron flange foot valve