The function of the Aston Seals SAC wiper ring is to prevent introduction of dust, dirt and foreign matter into the system, to protect the guiding parts and to extend the service life of the axial moving rod seals.
This is achieved by:
- a special wiper lip which produces a very effective cleaning action and prevents the development of scores.
- an external flap which covers the gland housing, preventing the slurry retention and the ingress of contamination around the outside, as happens in traditional wipers.
- an additional external sealing lip on the outside diameter as a further protection against moisture entering the groove.
The internal ribs give stability, prevent twisting and sticking of the wiper in the groove as well as release back-pressure between the rod seal and the wiper. The material used to produce this wiper is a polyurethane compound that ensures excellent properties in case of dry run, an increased wear-resistance and an extended service life due to good resistance against ozone and radiation caused by weather conditions.