... ,Hastelloy B,17-7PH , 20#alloy Standard or nonstandard: nonstandard spring mechanical seal Applicable working condition 1,The pressure of sealed ... temperature of sealed chamber: -40-220°C 3,Medium: water, oil, weak acid ,weak base and other general corrosive liquid Description1 ... 's rotating speed is low to 30000RPM2,The small spring with uniform spring force,it can be operated under the high rotate ...