Feed Check valve:
Functions of a feed check valve:
➠ To prevent the back flow of water from the boiler, when the feed pump pressure is less than boiler pressure or pump is stopped by using of a non return valve.
Constructions of a feed check valve:
➠ It consist of a non-return valve, water inlet pipe, outlet pipe, spindle, wheel and gland as shown in figure.
➠ The outlet pipe of valve is connected with the delivery pipe of feed pump.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjguMUd7lalfTrvM2gnHzCiwIRtGjQxUItIeQetfmL33eH8wFxEWubJ9vFx3vP3-3rMu2X2US_OlhNZdeDgEXh2mKh3x0nBzc4049qcRhSrPy1ef8_xf-zSZfJE3iz6psSmaqW8di2ro0I2/s1600/Feed+check+valve.jpg)
➠ At the inlet of valve the feed pump pressure acts and outlet pipe of the valve the boiler pressure acts. When the feed pump is in operation.
➠ The pressure on the feed pump side (inlet) is more than pressure on the boiler side (outlet).
➠ This pressure difference lifts the non return valve and allows water flow into boiler.
See Also:
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