A lift-actuated vent valve is used for automatic ventilation of roof spaces in floating roof tanks.
When Pressure/vacuum relief valve Pressure/vacuum relief valve is an umbrella term that includes pressure or vacuum relief valve as well as pressure and vacuum relief valve. a residual emptying of refilling of the tank takes place, the floating roof Floating roof A floating roof is the roof of a tank that is fitted with floating chambers (pontoons) and lies on top of the liquid. lowers and touches down with touchdown supports. During this process, the valve is opened.
