Characteristics and performance
It has a bronze filled PTFE ring with a pre-loaded lip energised by an O-Ring. The seal is designed to protect the primary rod seal from pressure spikes in the cylinder. It has a self relieving design in order to prevent excessive pressure build up in the cavity between the buffer seal and the rod seal.
The special PTFE ring has the low frictional properties normally associated with this material but is strengthened by additives to reduce creep. It has a low breakout friction so stick slip is eliminated.
Standard seals are supplied with a nitrile O-Ring but other materials can be provided.
The PTFE ring should always be mounted with the internal step on the pressure side. Sizes above 30mm are easily installed by deforming the PTFE ring into a kidney shape. Sizes under 30mm are best installed using a tool, details of which can be provided.Ask an expert
- Not suitable
* For fluid types marked as possible, please call our team of experts on +44 208 941 2244 to talk through your requirements and determine if this seal is the most suitable for your needs.
|Dynamic application||Static application|
|Fluids based on mineral oil|
|HFB (60/40 invert emulsion)||Possible||Possible|
|HFC (water glycol)||Possible||Possible|
|Other fluid types|
|HFD (Phosphate ester ARYL Type)||Not suitable||Not suitable|
|Synthetic esters (HEES, HFDU)||Recommended||Possible|