General
The profile ZHR is a double-acting rod seal and is mainly used in punches and cylinders. The ZHR profile has a central elastomer body with a special fabric vulcanised into the running surface. This fabric reinforcement maintains the lubricant film under the seal even after a long service life and high pressure. This significantly reduces the breakaway torque during start-up as well as wear. To prevent gap extrusion, the profile is additionally reinforced on both sides of the inner diameter with polyacetate-based angle support rings, which also guide the piston rod. This profile can also be used in water hydraulics.set-code SN250 = support ring slotted, set-code SN254 = endless support ring
Medium
Can be used in mineral oil, HFA, HFC and HFB fluids as well as water
Material
Standard materials:
- Seal ring: NBR compound
- Tread: special NBR fabric
- Backing rings: POM (polyacetate)
Advantages
- very robust design
- insensitive to pressure peaks
- wide media compatibility
- integrated guide elements
Installation instructions
To prevent the seal from being damaged, it must not be pulled over sharp edges. The seal set can be installed in closed grooves by means of a snap-in assembly. For special applications (high temperature, speed, specific pressure load or use in HFA, HFC or HFB fluids etc.) please contact our application engineering department.
Other
When used in HFA, HFC and HFB fluids, please note the temperature limits of -5°C and +60°C.
