APCO Vacuum Relief/Air Inlet Valves (AVR)

APCO AVR Vacuum Relief/Air Inlet Valves are proven reliable at preventing vacuum formation in pipelines and resulting damage from column separation and water hammer (pressure surges). They are normally closed, large orifice one-way valves. They permit air to enter the pipeline or system to break a vacuum, but no air escapes when the system pressure returns to positive. They are are recommended for either water/clean fluids or for sewage applications.

The AVR is also available as a Combination Valve with the large orifice Vacuum Relief/Air Inlet Valve opening quickly to prevent a vacuum while the small orifice Air Release Valve regulates a release of air from the pipeline.

Vacuum Relief/Air Inlet Valves are normally shut for prolonged periods of time, and often not readily accessible for inspection. Therefore, it is critically important to select a reliable, high-quality valve. The APCO AVR Vacuum Relief/Air Inlet Valve consists of a ruggedly constructed globe type body and the highest quality components.

The Vacuum Relief/Air Inlet Valve has a steel hood to prevent debris entering on sizes 6-24” (150-600mm) and a mushroom cap on sizes 3″ & 4” (80 & 100mm). Optional bug or rock screens are available.