The 263 series is one of the most robust five-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.
Long service life under the harshest conditions
Compatible with water-based fluids
Optimized for high running clearance
The 263 series piston seal features custom blended PTFE-filled compounds that provide ultra-low friction and high-speed performance and minimal wear. The standard compounds are PTFE-filled with bronze filler or PTFE-fille with glass-moly. The 263 series features a robust elastomeric energizer with backup rings in a high strength thermoplastic. The temperature range of the seal can be increased by selecting an FPM energizer in place of the standard NBR energizer.
|PTFE-Bronze compound / NBR / Pom||MT24|
|PTFE-Glass moly / NBR / POM||MT84|
|water oil emulsions (HFA)||-||-||+5…+50||+40…+140|
|water-glycol fl uids (HFC)||-.||-||-30…+60||-22…+140|
|Speed||5 m/s (16.5 ft/sec)|
|Pressure||400 bar (6000 psi)|
Note: for other materials or fluids please contact our engineering department