The most common fluoropolymer application is in process valves. We provide valve seats, manufactured from our AF range of materials, including PTFE and filled PTFE, VICTREX PEEK and filled PEEK materials, PEEK HT, Vespel®, PCTFE, Nylon and Acetal.

Products include:

  • Seats and seat inserts
  • Thrust washers and back up rings
  • Stem packings
  • High performance spring energised body seat and stem seals
PTFE & PEEK Valve Seat Manufacturing Process


Ball Valve Seat Material

We have a broad range of valve seat materials to suit your application, have a look at the table below or call us on 01992 515880 to talk to us in more depth about your project.

You can also find individual datasheets in our Materials Section.

Material Name Main Properties Notes Temperature Range
VIRGIN PTFE Very low coefficient of friction and excellent chemical resistance. FDA approved -40°C to 260°C
15% Glass Filled PTFE Decreased compressive strength and lower deformation under load than virgin PTFE. Abrasive material -40°C to 260°C
25% Glass Filled PTFE Similar to 15% Glass better wear resistance, higher compressive strength and lower deformation under load. Abrasive material -40°C to 260°C
Stainless Steel Filled PTFE Extremely hard wearing. Excellent strength and stability under extreme loads and elevated temperatures. Can be used on steam and thermal fluid applications -40°C to 260°C
TFM Much denser polymer structure than Virgin PTFE. Displays better stress recovery. Modified TFE Polymer -40°C to 260°C
Carbon Graphite filled TFM Lower thermal expansion-contraction rate than conventional TFM. Ideal for use on steam and thermal fluid applications -40°C to 260°C and even 320°C on Thermal Fluid applications
UHMWPE Highly resistant to corrosive chemicals, with the exception of oxidising acids and organic solvents. Also known as High Modulus Polyethylene (HMPE) or High Performance Polyethylene (HPPE) -40°C to +80°C
PCTFE Excellent for cryogenic and Oxygen use. A homo-polymer of Chlorotrifluoroethylene -270°C to 260°C
Virgin PEEK 450G Excellent chemical resistance and mechanical properties at elevated temperatures. An organic polymer thermoplastic -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
PEEK HT Retains all key features and benefits of PEEK 450G but retains physical properties to a higher temperature. Can be supplied in both virgin unfilled or as filled compounded material up to 260°C
Acetal and Delrin Displays good resistance to wear and deformation under load. Excellent for valve seat applications up to 80°C
VESPEL A polyimide material that has high temperature capabilities under load and is mainly used for heat transfer applications, hot gases and oils. Must not be used with STEAM
We can help with your project or application, call us on 01992 515880
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