... 19years experience 2.low leakagerate,high quality 3.OEM is welcome 4.CE High quality Anti-sweat worm gear ... Applicable medium: water ,sea water, sewage , oil, air, weak acid and soda etc. Applicable temperature of ... 90 degree on-off operation. 3.Disc has two-way bearing, perfect seal, without leakage under the ... to choose! 3.Each valve is taken for two times test pressure before leave factory! Every ...