The Hallite 653 single-acting rod buffer seal is designed to be used in conjunction with a high-performance rod seal, such as the Hallite 605 and 621, to protect the primary seal from shock pressure loading and high frequency pressure spikes in the hydraulic system. The design allows oil to pass through to the rod seal while holding back pressure spikes. The Hallite 653 is a patented product (European patent no. 0427554BI; U.S.A. patent no. 5088747) that also allows pressure to pass back into the system preventing a pressure trap between the rod seal and the buffer seal. The Hallite 653 is an excellent pressure buffer option in heavy-duty applications and offers extended sealing system life and performance.
The Hallite 653 is also interchangeable with common PTFE buffer seal housings.
The Hallite 653 is moulded in Hythane® 181, Hallite’s high-performance polyurethane, for easy installation and excellent low temperature performance. The Hallite 653 is also offered in a number of other high-performance polyurethanes, such as the Hythane® 361.
The design also incorporates a polyacetal anti-extrusion ring to provide maximum
extrusion resistance against shock pressure loads.
- 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|
|HFA (5/95)||Not suitable||Not suitable|
|HFB (60/40 invert emulsion)||Not suitable||Not suitable|
|HFC (water glycol)||Not suitable||Not suitable|
|Water||Not suitable||Not suitable|
|Other fluid types|
|Air/Nitrogen||Not suitable||Not suitable|
|HFD (Phosphate ester ARYL Type)||Not suitable||Not suitable|
|Synthetic esters (HEES, HFDU)||Possible||Not suitable|