PTFE ballvalve seat and valve stem sealing gasket Features PTFE ballvalve seat is manufctured by molding method with PTFE granular resin.PTFE compared with other plastics has a superior properties against chemicals and temperature. Main properties 1) Apparent density:2.10 2.30g/cm3 2) Tensile strength(min):≥14.0Mpa 3) Ulimate elongation(min):≥140 Applications: Ball valve seat gasket