W 80 X 100 X 9/10.8

0147 Wiper

0147

Wiper rings are of extreme importance for the protection of the critical hydraulic equipment parts. Penetrating dirt, not only deteriorates the sealing rings, but can also cause considerable wear on guides and piston rods. In addition the function of control valves and pumps may be influenced by foreign matter penetrating into the hydraulic fluid. At worst these units may be damaged. The object of the wiper is to remove any dirt from the piston rod, without destroying the oil film which is so necessary for lubrication.

These wiper rings are a combined dirt wiper and oil leakage seal made in nitrile rubber (NBR). They are used in applications involving long stroke and high speed, where it is necessary to control the oil film. A hard plastic ring is contained within the rubber ring and is centralized towards the piston rod. The high rigidity enables this wiper to remove even bonded dirt or frost. The elastic leakage oil lip wipes way the film which passes by the main seal when the piston rod is completely extended. In order to avoid a pressure build-up between the wiper ring and the main seal, it is necessary to provide an air release port between them. Experience shows that with this arrangement no oil will pass the port. When the piston rod is retracted, any oil present will be transferred back to the cylinder.

Application:

Suitable for use with hydraulic oil, water and emulsions.

Operating Conditions:

• Working Temperature: -30°C to 100°C (-22°F to 212°F)