DUO-CHEK® valves have long been the standard for low-pressure drop flow reversal protection. These valves are made from cast iron, cast steel, stainless steel, and a broad variety of exotic materials. Designs to API 594 end-to-end dimensions in steel bodied wafer and lug style. A wide variety of trim materials including both metal and resilient seats. Valves come in sizes up to 88″ and pressure ratings up to class 4500.
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