GA Industries
GA Industries Figure 942 Combination Air Valves employ a large and small orifice in a single body to efficiently vent air and gas from sewage forcemains. Air is vented through the large orifice as the system is filled and then it close tight once the system is full and pressurized. Residual air and gas is released through the small orifice while the system is in operation.The large orifice automatically opens to admit air when the forcemain is drained and/or a negative pressure occurs in the valve.
Figure 942 Combination Air Valves are typically installed at system high points where air and sewage gas naturally rise during filling, collect during operation and vacuum first forms during draining. The elongated body is designed to maintain an air gap between the solids bearing fluid and the valve's internal mechanism to minimize fouling and spillage.
Figure 942F includes optional "back flushing attachments" to facilitate cleaning sludge and debris from the valve.
GA Figure 942:
Combination Air Valve for Sewage, Single Body
GA Figure 942SS:
Combination Air Valve for Sewage, Single Body Durovent All SS
GA Figure 955-T, 955-D:
Combination Air Valve for Sewage Dual Body
GA Figure 957:
Combination Air Valve for Sewage, Dual Body, High Capacity Air Release
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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.