Rotary PTFE Lip Seals with metal casing

Our Rotary PTFE lip seals with metal casing also known as PTFE shaft seals are designed for optimal performance in high-speed rotary applications, minimizing friction and power consumption for surperior precision and responsiveness. Our seals stands out due to its exceptional PTFE compounds and innovative sealing lip construction, outperforming traditional rotary oil seals. Particularly effective in high-speed, poorly lubricated, corrosive, and high-temperature environments, it operates seamlessly in extreme conditions. The seals maintain reliability with typical temperature ranges from -60°C to 200°C (-76°F to 390°F) and accommodate shaft speeds up to 60 m/s (11,800 fpm) for low-pressure applications.

The radial contact pressure of the rotary lip seal’s sealing lip achieves a leak-tight seal on the shaft. This results from the precise combination of PTFE seal lip geometry, a static seal (gasket), accurate steel casing, and a meticulous forming process. In instances of special sizes or high-corrosion environments, 100% PTFE can be utilized without a steel casing. The interference complies with DIN 3760 specifications, ensuring static sealing between the steel casing of the seal and the seal housing. Our standard steel casing material is mild steel (SPCD), while alternative materials such as stainless steel (JIS SUS 304, DIN 1.4301) are available upon request.

In leak-critical applications, a threaded PTFE sealing lip—featuring a spiral groove machined into the seal lip on the medium side—can deliver a hydrodynamic pumping effect.

Advantages of our PTFE Shaft Seals

  • Designed for high-speed and low to medium pressure applications
  • Exceptionally low break-out and dynamic friction, maintained even after extended periods of downtime.
  • Exceptional service life attributed to the abrasion-resistant lip compounds.
  • Nearly universal chemical resistance, contingent on the selection of seal lip and steel casing materials.
  • Ideal for short-term dry running and long-term operation in poorly lubricated conditions.