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ZH926 PTFE enveloped gasket (PTFE envelope gasket) is comprised by a PTFE clad layer and embedded materials. Clad layer keeps the excellent chemical properties of PTFE. Embedded material, which further improves elasticity and sealing performance for gasket, is generally good elasticity non-metal or metal reinforced non-metal material, such as Asbestos-Rubber and Non-asbestos sheets. These gaskets are classified into three types by their cross-section:?
ZH924/A Glass Fibre Filled PTFE Gasket
ZH924/B Graphite Filled PTFE Gasket
PTFE gaskets are excellent in applications involving solvents, cor-rosive chemicals and high temperatures. There are different types of PTFE gaskets for each particular sealing application: ring, full face, flange and envelope gaskets.
A PTFE envelope gasket is a gasket that is split or machined from the outside diameter wall to 1/16 of an inch from the inside diameter. Envelope gaskets can be supplied slit/v-type or milled/square cut with or with out a filler. A ring gasket has a thickness, inside and outside dimension. A full face gasket has a thickness, inside and outside dimension along with bolt holes. A flange gasket is primarily the same as a full face without the bolt holes. These gaskets are available in standard and metric pipe sizes up to 60" outside diameter.