The valve controller is the power supply of the valve and also the close/open controller of the valve. The valve can adapt and install on 1/2, 3/4, or 1-inch pipe, adapt to a gas ball valve, butterfly valve. Can use the button on the valve controller to close or open the valve. When the valve controller doesn’t have power, you can pull the clutch beneath the valve and then manually move the manipulator close and open. Zero standby power consumption, safe and reliable design. This product can not only use for gas security but also widely used for the irrigation system, animal feeding water system, etc.