Stenso - Hovedkatalog 2019

Description Wipers PA and PAK provide exceptional good wiper/scraper the performence is even very high for very contaminated piston rods and also at very low temperatu- res. In comparison to designs in NBR, polyurethane wipers/scrapers have much better performence when comparing wear and corrosion, better anti ageing behaviour and therefore a much longer service life of the rod sealing system. Stick slip behaviour is improved due to optimisation of scraper lip design. The integrated and specially formed metal cage ensures high stability of the wiper by itself. Fatigue strenght of the wiper is very high, turning around the wiper in its gro- ove is not possible with this design. The drawing to the left shows various designs of both types of wipers: PA with a protruding wiper lip and PAK without a protruding wiper lip. The advantage of PAK is that it is better protected and that it allows for a better length of stroke of piston rod. The designs of PA resp. PAK are optimal with respect to wear of NBR metal wipers/scraper. They have proven their superiority, especially in low temperature applications. PA PAK PA/PAK 171 Wiper