GA Figure 251, 252:

Air Cushioned Swing Check, Lever & Weight Increasing Size

Size: 3" x 4" to 8" x 12"
Valve Type: Check Valve
Fluid: Wastewater, Water

GA Industries Figures 251-D and 252-D heavy duty, customizable swing check valves utilize an adjustable counterweight for rapid closure combined with a highly engineered air cushion chamber to provide non slam operation.In addition, the valve's outlet connection is expanded one or two sizes larger than the inlet connection which can often eliminate the need for an increaser fitting on the pump discharge.

Typically installed on the discharge of a pump to prevent backflow when the pump is off line, it opens smoothly at pump start and closes quickly and quietly upon pump shutdown.

The Figures 251-D and 252-D meet the design, materials of construction and testing required by AWWA C508 and are suitable for use with water or sewage.

  • Unique disc design affords 360 degree articulation for tight sealing under all pressure conditions
  • Expanded outlet connection can eliminate need for increaser fitting
  • Full flow area when swung only 25° away from seat for low head loss and reduced pumping cost
  • Bolted cover allows access to all internal components
  • Lever & weight and air cushion field convertible right hand to left hand side, and from horizontal to vertical installation
  • Body & Disc: Cast Iron, ASTM A126 Class B
  • Cover: Steel, ASTM A36
  • Body Seat: Stainless Steel, Type 316
  • Disc Seat: Buna-N
  • Hinge Shaft: Stainless Steel, Type 303 (Optional 316 Stainless Steel)
  • Cushion Chamber: Bronze
  • External Fasteners: Steel, A307, Zinc Plated (Optional 316 Stainless Steel)
Corrosion Protection
  • Standard: Internal and external NSF-61 certified 2-part epoxy
Drawings and Parts List
Fig 251 Drawing C1066-C
Fig 252 Drawing C1363-C
Installation, Maintenance and Operating Instructions
IOM Fig 251 & 252 022321
Product Bulletin
Air Cushioned Swing Check Bulletin
Sample Specification
250 Air Cushioned Rev B
Technical Datasheet
Figures 251-252 Data Sheet 251-252-01D
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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.


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 251, 252:
Air Cushioned Swing Check, Lever & Weight Increasing Size
GA Figure 251, 252 Image
Size: 3" x 4" to 8" x 12"
Valve Type: Check Valve
Fluid: Wastewater, Water

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