PTFE Envelope Gasket
Polytetrafluoroethylene (PTFE) envelope gaskets provide excellent sealing in corrosive environments. Combining the low friction and chemical stability of PTFE with the mechanical strength of the gasket material, GINSEAL® PTFE envelope gasket provides the user with a gasket that can be used confidently with aggressive media which would attack many other materials.

Up to +250oC (depending on the gasket material used).
Glass lined pipe systems, distillation columns and reactor vessels where
non-contamination is essential.

GINSEAL PTFE envelope gaskets are available slit (v-type) or milled
(square cut) with a variety of materials available for fillers.


Type A
Item No.: JSG-PT31
Made in the material forming a "V" shape space for one filler. The point
of the "V" protrudes slightly into the pipe causing slight flow turbulence.

Type B& C
Item No.: JSG-PT32 & JSG-PT33
Material is milled or machined out between leaves to form a U or square
shaped space for the filler. The filler is flush with the envelope which is
flush with the pipe, permitting free flow.

Larger size is also available. (Folded envelope)

Material for filler: Non-asbestos, EPDM, reinforced graphite, etc.

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