PTFE U-packings
PTFE U-packings made by Freudenberg Process Seals are used as unidirectional sealing elements with a U-shaped cross-section and a reinforcing metal spring to reliably seal rotating or translational movements.
Our PTFE U-packings are used in many engineering processes - from ball valves to piston pumps. Also ideal for the sealing of pressures, as the system pressure intensifies the sealing effect of this design and also in aggressive media thanks to high media stability of the PTFE material.
PTFE U-packings are fitted with a metal spring which balances out the prestress loss affected by the creep tendency of the PTFE. The contact pressure can be adjusted to the individual requirements by using U, V or O-shaped springs. To seal off translational and rotating movements, Freudenberg Process Seals offers PTFE U-packings in an axially or radially effective design, the latter optionally as an internally or externally effective version.
A summary of the advantages
- Universal media resistance and broad temperature range
- High functional reliability
- Non-aging
- No stick-slip effect
- Special design for high pressures
- Special hygienic designs with minimal dead space
- Sealing rotatary and translatory motion
- Sealing aggressive media and pressures
- Can be manufactured in almost all dimensions, as machined
- Spring can be made to suit the dimensions from endless material
- Standard dimensions (see types) can be delivered from stock
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Axial sealing |
Variant with dynamic internal sealing lip for use as a rod seal Standard piston diameters from 15 to 200 mm |
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Radial sealing |
With inward sealing function for use as a pressure seal (dimensions upon request) |
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Spring types |
V-spring with a great degree of spring displacement and soft spring characteristics for reduced friction, can be used for dynamic and static sealing, and for rotation sealing U-spring with a great degree of spring displacement and higher load, for |
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Material variants |
Pure PTFE |
PTFE U-packings cover a wide range of applications, particularly in the processing industry, which makes them an extremely universal and cost-effective sealing component.
Applications
- Food industry
- Pharmaceutical industry
- Beverage industry
- Chemical industry
Can be used in
- Ball valves
- Flanges and lids
- Pivot joints
- Distribution manifolds
- Hot water and steam valves
- Valves and fittings
- Piston pumps
- Bearings