The 263 is one of the most robust 5-piece piston seals available on the market. It consists of a profiled energizer, a PTFE-filled seal element, two active anti-extrusion backup rings and an elastomeric quad ring. It is designed for double-acting cylinders in heavy-duty applications subject to severe pressure spikes coupled with high running clearance. It offers zero drift performance due to the elastomeric seal ring, which also makes it ideally suited for gas sealing applications.
