Product
Wiper / Dust Seals
A wiper (dust) seal is fitted at the very outer end of the cylinder head, ahead of the rod seal, and scrapes contamination off the piston rod's surface every time it retracts back into the cylinder.
Wiper seal profiles: DHS, AY, A1/GHP, A5/J, UW2, LBH, AH/DKB, AF, MC-WR, and AM types.
Overview
How it works
As a piston rod extends outside the cylinder it picks up dirt, moisture and abrasive grit from the surrounding environment. If that contamination were carried back in on the next stroke, it would be dragged straight across the rod seal, scoring the rod surface and accelerating rod-seal wear. The wiper's job is purely defensive — it protects everything behind it rather than sealing hydraulic pressure itself, so its lip geometry is optimised for scraping efficiency rather than pressure holding.
Profiles
Available profiles
WR1
Standard single-lip wiper profile for general-duty cylinders.
UW1 / UW2
U-cup-style double-function wiper profiles for heavier contamination.
MC-UM / MC-WR
Metal-cased wiper variants for press-fit housing applications.
Materials
Which compound, and why
Polyurethane (PU)
The default wiper-lip material — abrasion resistance to survive repeated scraping duty.
Applications
Where used
Fitted at the rod-side end of hydraulic and pneumatic cylinder heads across mobile, construction and industrial equipment operating in dirty or abrasive environments.