A Breather Valve, also known as a Pressure Vacuum Relief Valve (PVRV), is designed to protect storage tanks and vessels from excessive internal pressure and vacuum conditions. It is typically installed on the tank roof or vent line to maintain safe operating pressure and minimize vapor loss.
During operation, the valve automatically releases excess pressure generated by product filling or thermal expansion and allows air to enter when a vacuum develops due to product withdrawal or temperature changes. This helps protect the tank from structural damage while ensuring safe and efficient operation.
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