... Applicable medium: water ,sea water, sewage , oil, air, weak acid and soda etc. Applicable temperature of electro ... .4 Seal test 1.11.76 Air Seal Test 0.60.6suitable medium Air, water, sewage, steam, gas, ... quick 90 degree on-off operation. 3.Disc has two-way bearing, perfect seal, without leakage under the pressure ... to choose! 3.Each valve is taken for two times test pressure before leave factory! Every ...