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PEEK Seals

PEEK Seals are among the most robust polymer seals available. PEEK exhibits extremely high tensile properties and low deformation under load. As a result, PEEK machined seals are very stable over an extended period of time, even in environments where pressure, temperatures, and chemicals place loads on the material.

Types of PEEK Seals

  • Piston ring seals

    Piston rings are used primarily to aid wear absorption on the outer diameter of the piston shaft. PEEK is hard enough to withstand the extensive wear induced within the piston, but not hard enough to damage the metal components

  • Ball valve seats

    Ball valve seats show a predominant preference for PTFE, as they require a soft material that yields easily to the shape of the ball valve.

  • Rotary shaft seals

    We have developed compounded grades of PTFE with PEEK to cater to the rotary shaft seals’ market. The combination of PTFE and PEEK is a powerful one.

  • Ball and butterfly valve seats

    A number of different thermoplastic materials are used in this application, including PTFE, Delrin and UHMWPE. PEEK finds acceptance specifically in applications with high pressures and temperatures.

  • Chevron and V-Packings

    Seals made with precise grooves that allow them to be stacked on one another and used as a single assembly. These find application in oil & gas as well as automotive industries.

Material selection is essential in getting the correct solution for a given application. Poly Fluoro Ltd understands the strengths and limitations of each material and accordingly works with the end-users to narrow in on the most effective option.

Material Name Main Properties Notes/Applications Temperature Range

Virgin PEEK

Excellent chemical resistance and mechanical properties at elevated temperatures High tensile strength and dimensional stability

FDA approved Most effective as a seal, backup ring, V-packing or Chevron seal Used as rotary seals in Nuclear applications

-40°C to 260°C

Carbon filled PEEK

Many similar properties to Virgin PEEK. Particularly suitable for elevated temperatures and high load situations.

Low coefficient of friction and suitable for many extremely corrosive applications

-40°C to 260°C

Glass filled PEEK

Many similar properties to Virgin PEEK. Particularly suitable for elevated temperatures and high load situations.

Low coefficient of friction and suitable for high wear applications

-40°C to 300°C

PTFE filled PEEK

Many similar properties to Virgin PEEK. Particularly suitable for elevated temperatures and high load situations.

Higher lubricity than Virgin PEEK. Suited to sealing applications where start-stop or rotary motions are involved at higher RPMs

-40°C to 260°C

Why Poly Fluoro Ltd ?

Extreme toughness
Valves exhibit mechanical strength to meet or exceed global norms
Excellent wear resistance
Special fillers and additives to improve wear properties
High precision
Tolerance on dimensions to within 10 microns
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