A pressure or vacuum relief valve is installed in vent lines of vessels and equipment and enables the equalization of overpressure or underpressure.
The function depends on which connection socket Anschlussstutzen A connection socket is the component which is used to connect the equipment to other components or lines. of the valve is connected to the tank. When connected to a bleed line, the valve compensates for overpressure Überdruck Overpressure refers to an increase in pressure in a system or vessel above the normal operating pressure. ; when connected to a vent line, it compensates for underpressure.
