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Air and Vacuum Valves

140 Series


150 Series

Are 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.

Immediate availability.
Sizes 1/2" thru 6".

Technical Drawings  
S -140 S -150
Combination Air Valves

140C Series

1800 Series

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.

Technical Drawings  
S -140C S -151C
S -150C S -1800
The single body (CAV) is used where compactness is preferred and / or where risk of tampering exists due to accessibility of the installation.
Immediate availability. Sizes 4" thru 36".

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