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Discharge vacuum relief valve for safety vacuum release system

  • US 9,568,005 B2
  • Filed: 12/18/2015
  • Issued: 02/14/2017
  • Est. Priority Date: 12/08/2010
  • Status: Active Grant
First Claim
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1. A method of providing discharge vacuum relief for a safety vacuum release system pump in a hydraulic system with discharge check valves, the method comprising:

  • providing a discharge vacuum relief valve kit including a vacuum vent tube with a first end and a second end, a discharge vacuum relief valve coupled to the first end of the vacuum vent tube, and a vacuum vent screen coupled to the second end of the vacuum vent tube;

    coupling the discharge vacuum relief valve to a drain plug opening of the safety vacuum release system pump;

    monitoring input power to the safety vacuum release system pump to detect a vacuum event on a suction side of the safety vacuum release system pump;

    shutting down the safety vacuum release system pump when the vacuum event is detected on the suction side in order to relieve the vacuum event;

    monitoring pressure on a discharge side of the safety vacuum release system pump; and

    venting the discharge side of the safety vacuum release system pump when a vacuum is detected on the discharge side to prevent delayed response time in relieving the vacuum event on the suction side.

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