Normally installed in 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.
Figures 221-D and 222-D meet the design, materials of construction and testing required by AWWA C508 and are suitable for use with water or sewage.
Product Number: GA Figure 221, 222
3″ x 4″ to 8″ x 12″
Check Valve
Wastewater, Water
- VAG/GA Industries Figures 221-DS and 222-DS are heavy duty, customizable swing check valves that utilize an adjustable counterweight assisted closure to minimize slam and hammer.In addition, the valve’s outlet connection is expanded one or two sizes larger than the inlet connection which can eliminate the need for an increaser fitting on the pump discharge.
- Normally installed in 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.
- Figures 221-DS and 222-DS meet the design, materials of construction and testing required by AWWA C508 and is suitable for use with water or sewage.
- Body & Disc: Cast Iron, ASTM A126 Class B
- Cover: Steel, ASTM A36
- Body Seat: Stainless Steel, Type 316
- Disc Seat: Buna-N
- Hinge Seat: Stainless Steel, Type 303 (Optional 316 Stainless Steel)
- External Fasteners: Steel, A307, Zinc Plated (Optional 316 Stainless Steel)
- Standard: Internal and external NSF-61 certified 2-part epoxy
