Designed to prevent the ingress of contaminents into the system thus extending the service life of the cylinder in applications where there is a risk of large accumulations of dirt on the Rod such as earth moving equipment. The Wiper is designed with positive seating of the outside face and beads on the inside diameter. These features provide sealing on the static face as well as stability in the housing. The Wiper is produced in 98° Shore A Polyurethane which offers a high level of stiffness providing the Wiper with the ability to remove dried on mud from the Rod. The material also has excellent wear properties for a long service life even under arduous conditions. The Wiper is designed to fit into closed housings
Optimum service conditions are affected by temperature, speed and surface finish.
Refer to Appendix 1 for further information.
|H||Mineral oil without additives||100|
|H-L||Mineral Fluid with anti corrosion and anti ageing additives||100|
|H-LP||Mineral oil as HL plus additives reducing wear, raising load||100|
|H-LPD||Mineral oil as H-LP but with detergents and dispersants||100|
|H-V||Mineral oil as H-LP plus improved viscosity temp.||100|
|HFA E||Emulsions of mineral oil in water. Water content 80-95%||40|
|HFA S||Synthetic oil in water. Water content 80-95%||40|
|HFB||Emulsions of water in mineral oil. Water content 40%||40|
|HFC||Aqueous polymer solutions. Water content 35%||ns|
|HFD R||Phosphoric acid ester based||ns|
|HFD S||Chlorinated hydrocarbon based||ns|
|HFD T||Mixtures of HFD R and HFD S||ns|
|HETG||Vegetable Oil based||60|
|HEES||Fully synthetic ester based||60|
For surface finish and recommended lead in chamfers refer to the illustration below. For housing dimensions and machining tolerances refer to the catalogue page of selected seal.
Refer to Appendix 4 for value of tolerance symbols.
Style PWC Wiper maybe deformed and fitted into a closed groove housing.
For the wiper to function correctly, it is important that care be taken in fitting the wiper within its housing.
For a detailed checklist, refer to Appendix 3.