GA Figure 931:

Air & Vacuum Valve for Water, With Surge Check

Size: 3" to 12"
Valve Type: Air Valve
Fluid: Water

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.

  • Compact and light weight
  • Full port orifice for maximum air outflow and inflow
  • Utilizes “kinetic” operating principle, designed not to blow shut
  • Rugged iron body and cover
  • Corrosion resistant Type 316 stainless steel float
  • Tight sealing and easily replaceable rubber seat
  • Body & Cover: Cast Iron, ASTM A126 Class B
  • Float: Stainless Steel, Type 316
  • Replaceable Seat: Buna-N
  • External Fasteners: Steel, A307, Zinc Plated
Corrosion Protection
  • Standard: Uncoated internal, external coated with enamel primer, minimum 2 mil DFT
  • Optional: 316 SS external fasteners and internal and external NSF-61 certified 2-part epoxy, minimum 6 mil DFT
Drawings and Parts List
Figure 931-D 3-4in Drawing EAV-7045W Rev B
Figure 931-D 6-12in Drawing EAV-7245W Rev A
Product Bulletin
Air Valve Bulletin VAG16 LR
Sample Specification
Air Vacuum For Water Rev B
Technical Datasheet
Air Valve Sizing For Pipeline Filling and Draining
Figure 931 Data Sheet 931-01F
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Clean Water

Dependable valves that meet your clean water needs

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.

GA Figure 931:
Air & Vacuum Valve for Water, With Surge Check
GA Figure 931 Image
Size: 3" to 12"
Valve Type: Air Valve
Fluid: Water

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