520 x 544 x 8.1 Stepped BTFE 2Pc Rod Buffer Seal Assembly Metric

Stepped seals are used to buffer pressure spikes from the primary rod seal, and are sometimes used in tandem. Combined with an unloaded U-cup, pressure builds between the step seal and primary seal and helps load the U-cup. Seals are machined from bronze-filled PTFE and urethane. Expanders are 70 durometer high memory nitrile, also available with FKM expander rings. Parts with a P are made from 55D shore urethane Parts with a -1 suffix are used in John Deere® cylinders.
Temperature: -40°F to 225°F
Pressure: 0 to 3500 PSI