The requisite radial contact pressure is assured by selecting the suitable PTFE compound and sealing lip geometry as well as a special manufacturing process.
A wide range of applications for the rotary shaft seals are screw compressors. In this special application the material benefit of PTFE are effective:
- Outstanding chemical resistance to corrosive media.
- Suitable for applications with high thermal loads from -60 °C to 200 °C.
- Suitable for use in low-lube and oil-free conditions.
- High wear resistance of the sealing lip compound for high peripheral speeds.
- Friction-optimised designs for minimum power loss.
- Low breakaway forces after prolonged down times (no stick-slip).
- Anti-adhesive behaviour of the sealing lip.
Because of special developed PTFE compounds the service life of sealing lips had been increased. In case of higher sealing performance requirements to be met by PTFE rotary shaft seals we recommend a spiral groove for hydrodynamic return feed either on the shaft surface or in the sealing lip, which has a positive sealing effect.
In case of a dirty environment an additional dust lip is recommended because particles under the sealing lip increase the wear. The choice of the lip version, single or double lip, depends on the customer application.
Enter 36A or at www.engineerlive.com/epe
ElringKlinger Kunststofftechnik GmbH is based in Bietigheim-Bissingen, Germany. www.elringklinger-kunststoff.de
