GA Figure 931 Air & Vacuum Valve for Water, With Surge Check

3” to 12”

Productgroup: Air Valves

Medium: 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

  • 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
Drawing and Parts List
3” and 4” Figure 931-DT
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6” to 12” Figures 931-DC and 931-DJ
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4” Figure 930-DT
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6” and 8” Figure 930-DC
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10” and 12” Figure 930-DC
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3” to 12” Figure 284 Surge Check Valve
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Product Bulletin
Air Valve Bulletin
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Sample Specification
Sample Specification
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Technical datasheet
3” to 12” Figure 931 Data Sheet
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9025 Marshall Road
Cranberry Township, PA 16066
United States
Phone: +1 724-776-1020

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