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relief valve

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WordReference Random House Unabridged Dictionary of American English © 2025

relief′ valve′,

Hydraulics, Mechanical Engineeringa device that, when actuated by static pressure above a predetermined level, opens in proportion to the excess above this level and reduces the pressure to it. Cf. safety valve (def. 1).

'relief valve' also found in these entries (note: many are not synonyms or translations):

escape - safety valve

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