Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Hitachi Ltd
Original Assignee
Hitachi Ltd
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Publication date
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to JP12947676ApriorityCriticalpatent/JPS5355508A/en
Publication of JPS5355508ApublicationCriticalpatent/JPS5355508A/en
PURPOSE: To provide a relief valve which is capable of assuredly raising the relief pressure to a required level by providing the valve with a valve having a fixed relief pressure provided by means of an urging means and also with a pressure responsive member adapted to force the valve to the colsed position against the urging of the urging means.