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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.