pressure-vacuum valve
[ presh-er-vak-yoo-uh m, -yoom ]
/ ˈprɛʃ ərˈvæk yu əm, -yum /
noun
a valve for relieving a sealed tank of any pressure or vacuum exceeding acceptable limits.
Words nearby pressure-vacuum valve
pressure vessel,
pressure welding,
pressure-cook,
pressure-treated,
pressure-tube anemometer,
pressure-vacuum valve,
pressure-volume index,
pressurization,
pressurize,
pressurized,
pressurized suit