PTFE envelope gasket
Our PTFE envelope gaskets consist of asbestos, non-asbestos, rubber, corrugated stainless steel etc. as cushion material encased in PTFE envelope, resulting in gaskets with the excellent corrosion resistance of PTFE and the strength and resilience of core materials. It can be produced in several types to meet the most demanding applications.
V style PTFE envelope gasket
The PTFE is slit in center from outside.
It is an economical solution for lower pressure applications.
Square style PTFE envelope gasket
The PTFE is cut into square envelope form.
For use with mediums with higher pressure.
U style PTFE envelope gasket
The PTFE is heat welded at the joint.
Normally for DN≥200mm.
Applications:
PTFE envelope gaskets are the ideal solution for applications demanding virtually 100% chemical resistance and where the mechanical properties of a compressed gasket material are also needed. They perform well in food processing industries where contamination of the medium is not permitted. Suitable for mediums like strong alkalis, cryogenic fluids, oxygen, chlorine gas, etc.
according to standards of ASME B16.21, DIN, etc. Special sizes and shapes are also available upon request.
Normal Thicknesses:
Thickness of core: 2.0mm.
Thickness of PTFE: 0.5mm + 0.5mm = 1.0mm.
From 20 mm to 500 mm: the gaskets are made in one piece;
From 500 mm upwards: the gaskets are welded. There are no size limitations for gaskets with welded envelopes.