Protecting non-metallic sealing rings
- Protection of non-metallic sealing rings from extruding
- Allows the use of PTFE as a sealing ring at high pressures
- Materials available for all fields of applications
HOERBIGER back-up rings are used to prevent non-metallic sealing rings from extruding into the space between the piston rod and packing cup. Back-up rings, which are typically made of cast iron or bronze material, seal only the end face of the packing case cup. The bore hole has a small clearance from the piston rod. They are suitable for all fields of application in the process, natural gas, or food industry.
|Piston rod diameter (in / mm)||0.78 to 7.8||20 to 200|
|Operating pressure range (psi / bar)||43.5 to 14,500||3 to 1,000|