Ball valve seat and PTFE Seal rings
The most common fluoropolymer application is used as sealing material for Valves. We provide valve seats,seat inserts, thrust washers and backup rings, stem packings by wide range of materials, such as PTFE, filled PTFE, TFM , PCTFE, PEEK，Vespel®, PCTFE, PI, Nylon and Acetal.
Over the years, based on our own advantages in the field of high performance polymer materials, We've been working with valve customers all over the world to manufacture various soft seals & seats.
Material Choice
Main Properties
Temperature Range
Virgin PTFE
Very low coefficient of friction and excellent chemical resistance.
-40°C to 260°C
Decreased compressive strength and lower deformation under load than virgin PTFE. Better wear resistance, higher compressive strength and lower deformation under load.
-40°C to 260°C
5%,15% and 25% Carbon Filled PTFE
Improved mechanical strength compared with virgin PTFE. Excellent wear properties, retains excellent frictional properties, good choice for seals and rings in dynamic and high-pressure applications
-40°C to 260°C
5% MoS2 Filled PTFE
Increased PTFE properties of hardness and wear resistance. Increased sliding properties and decrease friction.
-40°C to 260°C
Stainless Steel Filled PTFE
Extremely hard wearing. Excellent strength and stability under extreme loads and elevated temperatures.
-40°C to 260°C
TFM Series
Much denser polymer structure than Virgin PTFE. Displays better stress recovery.
-80°C to 260°C
PCTFE
Ideal sealing material for lower temperature and high pressure, good mechanical properties.
-240°C to 120°C
Excellent chemical resistance and mechanical properties at elevated temperatures.
-40°C to 260°C
Carbon Filled PEEK
Many similar properties to Virgin PEEK. Particularly suitable for elevated temperatures and high load situations.
-40°C to 260°C
PFA
Excellent chemical and temperature resistance, electrical insulation properties
-100°C to +260°C
UHMWPE
Highly resistant to corrosive chemicals, with the exception of oxidising acids and organic solvents.
-60°C to +80°C
Acetal and Delrin
Good resistance to wear and deformation under load.
up to 80°C
PI (Polyimide)
Significantly higher modulus, excellent wear and friction properties, good thermal-oxidative stability and high mechanical strength
up to 320°C
Customized Material by HONGDA
Designed & produced as per specific applications
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Excellent for LNG, Cryogenic and Oxygen use.