GA Figure F992:

Vacuum Breaking Valve for Water, With Air Release Valve

Size: 2½" to 12"
Valve Type: Air Valve
Fluid: Water

VAG/GA Industries Figure F992-D Vacuum Breaking and Air Release Valves are typically installed at locations along the pipeline where column separations are predicted to occur.They consist of a Figure F990-D Vacuum Breaking Valve and a Figure 920 Air Release Valve, factory assembled and tested as a unit.

The Figure F990-D's large orifice opens when the system pressure falls approximately 0.25 PSI below atmospheric.It rapidly admits air to limit the negative pressure.The large orifice closes when the pipeline pressure recovers above the opening pressure.Air that was drawn into the pipeline is then slowly released through the Figure 920's small orifice as the system re-pressurizes, minimizing the consequences of column separation.

  • Compact and light weight
  • Full port orifice for maximum air inflow during negative pressure, small orifice controls air release rate
  • Rugged iron body with lead free bronze & SS trim
  • Tight sealing and easily replaceable rubber seat
  • Screened hood to minimize entry of foreign matter
  • Vacuum Breaker Body:Ductile Iron, ASTM A536 Grade 65-45-12
  • Vacuum Breaker Plug & Seat: Lead free bronze
  • Vacuum Breaker Replaceable Seat: Buna-N
  • Air Release Valve Body & Cover: Cast Iron, ASTM A126 Class B
  • Air Release Valve Float and Trim: Type 316 Stainless Steel
  • Air Release Valve Replaceable Seat: Buna-N
  • External Fasteners: A307 Steel Zinc Plated
Corrosion Protection
  • Vacuum Breaker: Fusion Bond Epoxy Lined and Coated
  • Air Release Valve: Internal Uncoated, External Enamel Primer
Product Bulletin
Air Valve Bulletin VAG16 LR
Sample Specification
Vacuum Breaking Valve For Water Rev B
Technical Datasheet
Air Valve Sizing For Pipeline Filling and Draining
Figure F992 Data Sheet F992-01
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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 F992:
Vacuum Breaking Valve for Water, With Air Release Valve
GA Figure F992 Image
Size: 2½" to 12"
Valve Type: Air Valve
Fluid: Water

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