high quality&resonable price Material:304, 316 ,316L , Hastelloy c,HastelloyB ,17-7PH 20#alloy nonstandar spring mechanical seal Applicable working condition1,The pressure of sealed chamber: 1.2Mpa2,The temperature of sealed chamber: -40-220°C3,Medium : water, oil, weak acid ,weak base and other general corrosive liquidDescription1,Big spring is mainly used for the condition of some general ...