suction valve

English

suction valve (plural suction valves)

An automatic non-return valve that opens when the boiler is at less than atmospheric pressure so as to avoid any risk of vacuum collapse when a hot boiler is allowed to cool down out of service.

单词	suction valve
释义	suction valve English Noun suction valve (plural suction valves) An automatic non-return valve that opens when the boiler is at less than atmospheric pressure so as to avoid any risk of vacuum collapse when a hot boiler is allowed to cool down out of service.
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