Dual Plate Check Valves are automatic in operation and designed to prevent reversal of flow in fluid piping systems. These valves are maintained open by the flow of fluid in the straight direction and are closed by back pressure of the fluid.The swing check variation is a low pressure drop unit based on a hinged disc. This valve is suitable for low velocity applications with infrequent velocity reversals. The valve can be fitted with external weights to allow faster closure to reduce water hammer or shock pressure on flow reversal.
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