VAG GA Industries Figure 931-D is a Figure 930 Air & Vacuum Valve and a 'surge check' valve factory assembled and tested as a unit.This valve system vents air during filling and admits air during draining.Pus, the surge check's 'slow closing' adjustable regulated exhaust feature minimizes surges, shock and valve damage caused by sudden air valve closure due to column separation/rejoining.
Figure 931-DT is standard with NPT outlet, optional cowl.The Figure 931-DC is standard with an outlet cowl while the Figure 931-DJ has a Class 125 flanged outlet.
GA Figure 930D, 930U:
Air & Vacuum Valve for Water, FLG x Cowl
GA Figure 930DT:
Air & Vacuum Valve for Water, FLG x NPT
GA Figure 930T:
Air & Vacuum Valve for Water, NPT x NPT
GA Figure 931:
Air & Vacuum Valve for Water, With Surge Check
GA Figure 933:
Air & Vacuum Valve for Water, With Throttle Device
GA Figure 935:
Air & Vacuum Valve for Sewage, Standard Body
GA Figure 939:
Air & Vacuum Valve for Sewage, Short Body
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From the raw water intake to the filtration plant to the finished waster distribution and storage system, GA Industries valves have been providing dependable service in large and small water systems. GA Industries pump control, check and relief valves mitigate damaging pressure surges and eliminate slam and bang that can result from the operation of water pumps.
Our full range of pilot operated control valves regulate distribution system pressure and prevent overflow of storage tanks and reservoirs. Air trapped in water pipelines can reduce system efficiency and exacerbate pressure surges. Our wide range of automatic air valves ensures we have the right valve to maintain an air free system.
And when it’s necessary to isolate a pump, process or section of pipeline, you can depend on GA Industries butterfly valves for reliable flow shutoff.