GA Figure 939SS:

Air & Vacuum Valve for Sewage, Short Body Durovent All SS

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

VAG GA Industries Figure 939SS 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.

Whether due to the fluid itself or ambient conditions, Durovent® Wastewater Air Release Valves provide the ultimate in corrosion resistance since the body, cover, float, internal linkage, external fasteners and pipe plugs are all made from Type 316 stainless steel.

Figure 939SS 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.The valve's short body allows it to be used in shallow cover installations where a standard elongated body would be too tall.

Figure 939SSF 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
  • Rugged, heavy duty cast 316 stainless steel body - no potential for weld corrosion
  • Corrosion resistant Type 316 stainless steel float, plug, seat ring and internal mechanism - no plastic components
  • Tight sealing and easily replaceable rubber seat
  • 2” NPT plugged port allows removal of large debris
  • Body & Cover: Stainless Steel, Type 316
  • Float: Stainless Steel, Type 316
  • Internal Linkage: Stainless Steel, Type 316
  • Replaceable Seat: Buna-N
  • External Fasteners: Stainless Steel, Type 316
  • Pipe Plugs: Stainless Steel, Type 316
Drawings and Parts List
Drawing EAV7046SW-A (2x1" to 3x2" Valve)
Drawing EAV7047SFW-A (2x1" to 3x2" Valve + Backflush)
Installation, Maintenance and Operating Instructions
IOM Figure 939SS 111120
Product Bulletin
Air Valve Bulletin VAG16 LR
Sample Specification
Durovent Air Vacuum For Sewage Rev B
Technical Datasheet
Fig 939SS Data Sheet 939SS-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 939SS:
Air & Vacuum Valve for Sewage, Short Body Durovent All SS
GA Figure 939SS Image
Size: 2" x 1" to 3" x 2"
Valve Type: Air Valve
Fluid: Wastewater

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