A check valve — also called a one-way valve, non-return valve, or clack valve — only allows flow in one direction while preventing reverse flow, or flow in the opposite direction. These valves open and close based solely on the hydraulic pressure from the flow of water acting on the valve mechanism.
Check valves are designed to prevent the reversal of flow in a piping system. These valves are activated by the flowing material in the pipeline. The pressure of the fluid passing through the system opens the valve, while any reversal of flow will close the valve. Closure is accomplished by the weight of the check mechanism, by back pressure, by a spring, or by a combination of these means. The general types of check valves are swing, tilting-disk, piston, butterfly, and stop.
Check Valves are used to prevent the back flow of fluid by closing before flow reversal, thereby preventing slam and water hammer. Relia Check Valves have been successfully installed in clean and dirty applications including petrochemical, water treatment, industrial water and wastewater services. The designs meet or
exceed the current revision of API 6D or BS 1868.
Cast Steel Check Valves are offered in swing check & piston check styles.
Drawing & Dimensions
Cast Steel Check Valve Class 150
Cast Steel Check Valve Class 300
Cast Steel Check Valve Class 600