Buffer seals protect the primary rod seal from excessive pressure loads and spikes.
Buffer seals must allow adequate lubrication of the main rod seal, and prevent pressure to build up between the two.
Buffer seals are typically designed into hydraulic sealing systems in heavy-duty applications.
The buffer seal is placed closer to the piston to absorb the pressure during the stroke.
There are many rod and buffer sealing profiles, and positions within the cylinder that they can be arranged.
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