The WVN wiper can be self-aligned in case of rod misalignment during operations, due to its special profi le and design, WVN is a double lip Wiper in TRIATHANE® (Poly-Urethane) material, mostly suggested to be used in conjunction with a back pumping Primary Seal/Secondary Seal, like TRITILT®(RSS Style) Seal. The inner lip holds the fi lm of oil within the system without being leaked out and the outer lip shall prevent any dust particles entering the system.