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Heavy Duty S
GA Figure 221, 222
GA Figure 221, 222
Heavy Duty S
Size:
3" x 4" to 8" x 12"
Type:
Check Valve
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 are suitable for use with water or sewage.
Characteristics
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.
Material
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 __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