Is a double acting piston seal consisting of an outer sliding part of Kefloy® energized by a rubber O-Ring. SlipRing® is pressure responsive. SlipRing® can be used with a great variety of fluids. Kefloy® is compatible with virtually all fluids. To avoid extrusion and ease installation SlipRing® type 2522- is chamfered. SlipRing® type 2522- is available in Standard series, Light Duty series and Heavy Duty series.