Teflon/PTFE Washer: Teflon washer or PTFE washer is a polytetrafluoroethylene washer that is used in various industries due to its unique properties. Its melting point is about 327 degrees Celsius and its operating temperature is between -200 and 260 degrees Celsius. Teflon washer has excellent electrical insulation properties, high chemical resistance, low friction coefficient and heat resistance. Its applications include the chemical, food, pharmaceutical and electronics industries. Different grades of Teflon washer include glass Teflon washer, carbon Teflon washer and graphite Teflon washer, each of which has its own properties and applications.