Relief valve

Rarity: Common

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Notion

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Science and technology

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What Wikipedia says

A relief valve or pressure relief valve (PRV) is a type of safety valve used to control or limit the pressure in a system; excessive pressure might otherwise build up and create a process upset, instrument or equipment failure, explosion, or fire.

Excerpt from the Wikipedia article “Relief valve”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: RomanM82, CC BY-SA 4.0, via Wikimedia Commons.