ptfe envelope gasket ptfe gaskets includes: antileak ga 01501 pure ptfe gasket antileak ga 01502 ptfe envelope gasket antileak ga 01503 modified ptfe gasket antileak ga 01504 expanded ptfe gasket antileak ga 01502 ptfe envelope gasket consists of asbestos, non-asbestos, rubber etc. cushion material having exposed surface covers with ptfe envelope. depends on excellent corrosion resistance and compression resilient, ptfe envelope gasket is widely used in strong alkalis, cryogenic fluids, oxygen, chlorine gas and disallowable polluted medium etc. ptfe envelope gasket is used to seal pipe flanges glass lined, pvc or frp. low bolt torque effecting a seal and chemical compatibility is a main characteristic of this type of gasket. material and type of ptfe envelope gaskets filler materials: non-asbestos compressed sheet, compressed fiber sheet, asbestos compressed sheet neoprene, reinforced graphite sheet ,corrugated steel. l- type, v-type, u- type are available. please log on our website for more details of antileak ga 01502 ptfe envelope gasket and other products.