Wiper BWA
BWA wipers are polyurethane protective seals, with a profile designed for complete cleaning of the rod before it comes into contact with the main sealing element. Their role is not only to block contaminants from the outside, but also to prepare the rod surface for contact with the seal, removing abrasive particles that would damage the sealing lip with each cycle.
The geometry of the BWA profile and cleaning the rod before contact with the main seal
The BWA profile is optimized for the effective removal of solid particles and the film of dirt from the rod surface during retraction. The contact lip has a geometry that maximizes the cleaning force in relation to the generated friction force — the rod is cleaned without premature wear of the chrome-plated surface. You can find the complete catalog of wiper rings on hydsealstore.ro.
Polyurethane and the balance between flexibility, stability, and abrasion resistance
Polyurethane combines the elasticity required to adapt to dimensional microvariations of the rod with resistance to abrasive wear that guarantees a long service life. BWA maintains tight contact with the rod after thousands of cycles and does not show permanent deformation after intensive use. It operates at temperatures between -30°C and +110°C and is compatible with mineral hydraulic oils. Also compare with WED wipers for applications with similar cleaning requirements.
Choosing from the numerous BWA sizes according to diameter, thickness, and housing configuration
The selection is based on the rod diameter, the outer diameter of the housing, and the groove depth. Also check the profile height in relation to the groove depth — the wiper must fit completely into the groove without protruding beyond the surface of the cylinder head. They are replaced preventively during each cylinder overhaul. Also compare with A211 wipers made of polyamide for adhering deposits on the rod.
Checking the price and stock for BWA wipers at Hydraulic Seals Store
We keep BWA wipers in stock in standard sizes. We deliver quickly throughout Romania. Order online from the Hydraulic Seals Store catalog or contact us for assistance.