1.Nominal diameter:2"~72" 2.Nominal pressure:150Lb 3.Medium:sea water, corrosive ... 11 Materials of main parts HT200,QT450,WCB Pressure levelsAWWA C504 25B,50B,75B,150B Applicable temperature ... system, adjust and closure equipment used to do;2.3 "24 "rubber seat directly vulcanization to the ... within the scope of reliable performance;8. Design pressure, completely sealed, leakage is zero AWWA C504 Flange ...