Sealing
Plastic materials for valve seats, seals, and gaskets
Plastic sealing materials are used in valves, regulators, and seals where low friction, wear resistance, chemical resistance, dimensional stability, and service temperature can affect performance. Common sealing applications include valve seats, seals, gaskets, backup rings, wear components, and parts used in fluid handling, industrial equipment, aerospace, food processing, and chemical processing environments.
Material selection depends on pressure, temperature, media exposure, friction, wear, creep resistance, thermal expansion, and whether the application involves high or low service temperatures. PTFE is often considered where low friction and chemical resistance are important, while PEEK may be used for higher temperature, higher load, or more demanding sealing applications. UHMW and acetal may also be considered depending on the operating conditions and component design.
Use this page to compare plastic materials for sealing applications, then ask a plastics expert or get a quote to discuss material availability, sizing, documentation, or fabrication needs.
Curbell Plastics can help you:
- Compare plastic materials for valve seats, seals, gaskets, backup rings, and wear components.
- Evaluate material options for low friction, wear resistance, chemical resistance, creep resistance, dimensional stability, and high or low temperature service.
- Review pressure, temperature, media exposure, load, motion, surface finish, tolerances, documentation, and fabrication requirements before selecting a material.
DuPont™ Vespel® Polyimide
Extremely high temperature creep resistant plastic with excellent friction and wear characteristics.
PCTFE
Fluoropolymer with outstanding dimensional stability, mechanical properties, and temperature range.
PEEK
Strong, stiff plastic with outstanding chemical resistance; performs over a wide range of temperatures.
PFA
Flexible fluoropolymer that performs well in extreme temperature and harsh chemical environments.
PTFE
Low friction engineering plastic with outstanding chemical, high temperature, and weathering resistance.
DuPont™ Vespel® Polyimide
Extremely high temperature creep resistant plastic with excellent friction and wear characteristics.
PCTFE
Fluoropolymer with outstanding dimensional stability, mechanical properties, and temperature range.
PEEK
Strong, stiff plastic with outstanding chemical resistance; performs over a wide range of temperatures.
PFA
Flexible fluoropolymer that performs well in extreme temperature and harsh chemical environments.
PTFE
Low friction engineering plastic with outstanding chemical, high temperature, and weathering resistance.
Not sure which materials best fit your needs?
Our experienced sales and technical teams are available to assist you with material selection challenges.
