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The 842 type single-lipped, snap-in rod wiper is developed specifically for use in harsher environments with heavy contamination, such as in agriculture, off-highway, forestry, and long wall mining equipment. The unique feature of the 842 is the Umbrella Wiper Technology, which is a protective debris guard flap on the wiping lip that entirely covers the gland housing and prevents the water/slurry trap that is common with conventional wipers. This feature offers added protection to the integrity of the hydraulic system, providing increased system life by reducing corrosion and preventing the ingress of contamination into the wiper housing groove and hydraulic cylinder gland. The moulded ribs on the internal diameter provide extra stability to the wiper and help prevent the possibility of blow-out due to pressure trapping between the wiper and the main rod seal. The standard 842 is moulded in Hythane 181, Hallite's high-performance polyurethane, for easy installation and excellent low temperature performance.
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