170 x 191 x 8.1 Stepped BTFE 2 Pc 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