PTFE Spring Energized Radial Valve Seals

PTFE radial shaft seals with one or more PTFE sealing lip(s) are designed to withstand aggressive environments, high temperatures, high pressures and dry running that traditional radial shaft seals made of elastomeric sealing lip materials cannot withstand. Many of the PTFE compounds are FDA approved. Main advantages of PTFE seals include:

Wide operating temperature range, –70 to +250 °C (–95 to +480 °F)

Withstand pressures up to 3,5 MPa (500 psi)

Withstand dry running

High chemical resistance

Withstand speeds up to 30 m/s (5 900 ft/min)

The selection of seal materials typically requires a compromise between advantages and disadvantages. There are hundreds of different PTFE materials with a variety of fillers. Common fillers include glass fibre, carbon, graphite, molybdenum disulphide, metal oxides and various polymers. Each possesses different properties, appropriate for different applications and service conditions. Common to all filled PTFE materials are their improved resistance to wear and deformation.

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