Master Stocking Distributor & Valve Automation Shop
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Heavy Duty S
GA Figure 220
GA Figure 220
Heavy Duty S
Size:
3" to 48"
Type:
Check Valve
GA Industries Figures 220-DS and 220-US are heavy duty, customizable swing check valves that utilize an adjustable counterweight assisted closure to minimize slam and hammer.The valve is typically 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 220-US meet the design, materials of construction and testing required by AWWA C508 and are suitable for use with water or sewage.
Characteristics
Heavy duty construction withstands rigors of pump station operation __Full flow area when swung only 25° away from seat for low headloss and reduced pumping cost __Replaceable rubber disc seat for tight seating at low and high pressure __Lever & weight field convertible right hand to left hand side, and from horizontal to vertical installation
Material
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 __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
