Material: PTFE , Non-asbestos, EPDM, Metal

PTFE Envelope gaskets have three structure PMF, PMS, PFT and PFF. Gaskets are manufactured by gasket core with a PTFE lamination. They combine the mechanical strength, resilience and bolt load retention of gasket with the chemical resistance of PTFE. They are used in equipment with glass; ceramic or glass coated steel flanges. Maximum service temperature is 500oF (260oC), the limit for PTFE.