Is a double acting piston seal consisting of an outer sliding part of Kefloy® energized by a rubber O-Ring. SlipRing® A is pressure responsive. SlipRing® A can be used with a great variety of fluids. Kefloy® is compatible with virtually all fluids. To avoid extrusion SlipRing® A type 2612- is furnished with a special chamfer. SlipRing® A type 2612- is available in Standard series, Light Duty series and Heavy Duty series.