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vacuum relief valve

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vacuum relief valve [′vak·yəm ri′lēf ‚valv]
(engineering)
A pressure relief device which is designed to allow fluid to enter a pressure vessel in order to avoid extreme internal vacuum.
vacuum relief valve
An automatic valve that opens and closes a vent for relieving a vacuum within a hot water supply system.
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For minimum floor space PowerMax compact positive displacement pump has accessories that include vacuum gauge, muffler, vacuum relief valve, belt guards, and vacuum switch, which electrically signals vacuum status to the microprocessor control.
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I bought a new vacuum gauge and vacuum relief valve from W.
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The letter noted that vacuum relief valves had exhibited problems with sticking and low vacuum pressure, which the firm was cited for in three areas including a failure to investigate the cost of non-conformities and to identify actions needed to correct and prevent recurrence of nonconforming products.
MEDICAL DEVICES by Warning Letter Bulletin
 
 
 
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