HW wiper seals

HW seals are snap-in wiper seals and (fig. 4) have a double-lip design with an internal-facing wiper lip that regulates the lubrication film on the rod. The internal lip wipes any excess fluid film from the rod on the extending stroke and allow this excess fluid to return under the rod seal on the retracting stroke. Double-acting wipers, therefore, improve the performance and extend the service life of rod sealing systems. SKF recommends using double-acting wiper seals in combination with U-cup rod seals with a single-lip design, such as S1S profile, to safeguard pressurized fluid can return to the hydraulic system. These profiles are available in metric and inch sizes. For additional information, refer to HW profile data below.