GA Figure 939:

Air & Vacuum Valve for Sewage, Short Body

Size: 2" x 1" to 3" x 2"
Valve Type: Air Valve
Fluid: Wastewater

VAG GA Industries Figure 939 Air & Vacuum Valves efficiently vent air and sewage gas from sewage forcemains as they are being filled and then close tight once the system is full and pressurized.They automatically open to admit air to limit vacuum formation when the forcemain is drained and/or a negative pressure occurs in the valve.

Figure 939 Air & Vacuum Valves are typically installed at system high points where air and sewage gas naturally rise during filling and vacuum first forms during draining.Short body sewage air & vacuum valves are ideal in shallow cover installations that preclude the standard elongated body.

Figure 939F includes optional 'back flushing attachments' to facilitate cleaning sludge and debris from the valve

  • Short body ideal for “shallow cover” installations
  • Full size orifice for maximum air outflow and inflow rates
  • Corrosion resistant Type 316 stainless steel float and internal mechanism
  • Tight sealing and easily replaceable rubber seat
  • 2” NPT plugged port allows removal of large debris
  • Body & Cover: Cast Iron, ASTM A126 Class B
  • Float: Stainless Steel, Type 316
  • Internal Linkage: 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
Drawing EAV7047FW-A (2x1" to 3x2" Valve + Backflush)
Drawing EAV7047W-A (2x1" to 3x2" Valve)
Installation, Maintenance and Operating Instructions
IOM Figure 939 111120
Product Bulletin
Air Valve Bulletin VAG16 LR
Sample Specification
Air Vacuum For Sewage Rev B
Technical Datasheet
Air Valve Sizing For Pipeline Filling and Draining
Figure 939 NPT Data Sheet 939-01D
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Reliable wastewater valves designed for rigorous service

GA Industries sewage and wastewater valves are specially designed to accommodate the rigorous demands of the sewage collection, pumping and treatment process.

Whether a large regional sewage pump station, a small lift station or in-plant process pumping, GA Industries line of wastewater check, pump control and surge relief valves provide reliable service under difficult operating conditions. GA Industries ECO-Centric® plug valves handle solids and stringy material and are used in sewage and wastewater systems for pump, pipeline or process isolation.

Our full range of sewage and wastewater air valves automatically release air and sewage gas from forcemains to maintain pumping efficiency and minimize pipeline corrosion.

GA Figure 939:
Air & Vacuum Valve for Sewage, Short Body
GA Figure 939 Image
Size: 2" x 1" to 3" x 2"
Valve Type: Air Valve
Fluid: Wastewater

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