Stop Check Valve is a combination of a lift check valve and a globe valve. It can either be used as a check valve or as an isolation (stop) valve like a globe valve. These valves can be closed with the help of a stem that is not connected to the valve disc during normal operation and make it possible to use these valves as a regular NRV.
Oct 24, 2017 · A foot valve is found at the end of a pipe line in a suction lift application. They function as a check valve, but they also have a strainer affixed to their open end. The check valve is spring assisted. When the pump turns on, the pressure inside the pump column changes and the valve responds by opening.
Define valve. valve synonyms, valve pronunciation, valve translation, English dictionary definition of valve. valve top: closed check valve bottom: open check valve n. 1. a. Any of various devices that regulate the flow of gases, liquids, or loose materials through...
The Silent Check Valve is the preferred choice in applications where silent operation and cost are of major concern. Its short linear stroke and spring return action combine to close the valve prior to flow reversal which effectively eliminates the shock and water hammer normally associated with the sudden stoppage of a reverse flow.
Check valves, or one-way valves, are designed to stop backflow and, ultimately, to protect pumps and compressors. Check valves are found in many industries and with various applications ranging from municipal water to mining and natural gas.
Simply put, a check valve allows flow in one direction and automatically prevents back flow (reverse flow) when fluid in the line reverses direction. They are one of the few self-automated valves that do not require assistance to open and close.