pump mechanical seal 1.material:metal,ptfe,rubber 2.standard size 3.place of origin:china 4.MOQ:20pcs Main Characteristics for pump mechanical seals Mostly Use: average corrosion mediums, such as water, oils, weak acid, weak alkali etc. Pressure in the sealed chamber: <= 0.8Mpa Temperature in the sealed chamber: -20oC~180oC Linear Velocity: <= 15m / sec pump mechanical seal