snifter valve

noun
variants: or snifting valve

Definition of snifter valve

1 : a small valve opening into the atmosphere from a cylinder, from a condenser, or from the air chamber of a steam pump to allow the escape or entrance of air and the release of accumulated water at each stroke of the piston

called also sniffle valve

2 : any of various valves (as in an internal combustion engine) resembling a snifter valve

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