Category Products Check Valve

Check Valves

The valve that used to prevent backflow in a piping system is known as a check valve. It is also known as a non-return valve or NRV. The pressure of the fluid passing through a pipeline opens the valve, while any reversal of flow will close the valve. It allows full unobstructed flow and automatically shuts as pressure decreases. The exact operation will vary depending on the mechanism of valve.

Check valves are often used when multiple gases are mixed into one gas stream. A check valve is installed on each of the individual gas streams to prevent mixing of the gases in the original source.

Check valves are used with some types of pumps. Piston-driven and diaphragm pumps, such as metering pumps and pumps for chromatography, commonly use inlet and outlet ball check valves. These valves often look like small cylinders attached to the pump head on the inlet and outlet lines. Many similar pump-like mechanisms for moving volumes of fluids around use check valves such as ball check valves.

Check valves are also used in many fluid systems, such as those in chemical and power plants. Typical applications in the nuclear industry include feed water control systems; dump lines; make-up water; miscellaneous process systems; N2 systems; and monitoring and sampling systems. In aircraft and aerospace.