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The 653 type single-acting rod buffer seal is designed to be used in conjunction with a high-performance rod seal, such as the 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 653 allows pressure to pass back into the system preventing a pressure trap between the rod seal and the buffer seal. The seal is an excellent pressure buffer option in heavy-duty applications and offers extended sealing system life and performance. This swal is moulded in Hythane� 181, Hallite's high-performance polyurethane, for easy installation and excellent low temperature performance. The design incorporates a polyacetal anti-extrusion ring to provide maximum extrusion resistance against shock pressure loads.
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