Wiper Seals
Wiper seals are used in sliding or reciprocating motions, to prevent contamination of the lubricating system from dirt particles (dust, mud, water, etc.).
The lip of the wiper removes even the tiniest dirt from the piston rod.
Such dirt particles can cause damage to hydraulic or pneumatic systems during stroke movement. Even if they appear in good condition, wipers should always be replaced when other seals are changed.