Pressure Relief Zerk Grease Fittings

Pressure relief valves, or pressure relief fittings, release excessive pressure build up from the operation of bearing housings or gear boxes. As pressure increases, the integrated plunger or check ball rises allowing pressurized air to escape. Once pressure decreases below a minimum threshold, the valve closes.

  • Upper pressure range indicated on the top or side of the fitting
  • For best performance, install above fluid level
  • Side vent valves are available through special order
  • Visit our Product FAQs to learn more about our lubrication accessories
Pressure Relief Zerk Grease Fittings

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