Air Release Valve
Air Release Valves function to release air pockets that collect at each high point of a fully pressured pipeline. Air Release Valves can open against internal pressure, because the internal lever mechanism multiplies the float force to be greater than the internal pressure. This greater force opens the orifice whenever air pockets collect in the valve. Air Release Valves are essential for pipeline efficiency and water hammer protection.
Immediate availability.
Sizes 1/2" thru 1".
Air/Vacuum Valve
Float operated, having a large discharge orifice, equal in size to the valves inlet. Air and Vacuum valves allow large volumes of air to be exhausted from - or - admitted into a water pipeline as it is being filled or drained. As the pipeline fills, water enters the Air Valve, raises the float and shuts-off. When draining the pipeline, the float drops, allowing air to enter, preventing vacuum, possible pipeline collapse and damaging water column separation. Air & Vacuum Valves are an efficient means to fill and drain pipelines.
Sizes 1/2" - 3".
Combination Air/Vacuum Valve
As the name implies, combines features of Air/Vacuum Valves and Air Release Valves. These valves are also called Double Orifice Air Valves. These Valves are installed on all high points of a system where it has been determined dual function Air/Vacuum and Air Release Valves are needed to vent and protect a pipeline. Generally, it is sound engineering practice to use (CAV) instead of simple purpose Air/Vacuum Valves. (CAV) are available in two body styles - (1) single body combination (2) custom built combination (CCAV) with two bodies.
The single body (CAV) is used where compactness is preferred. Immediate availability. Sizes 1" - 8"
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