Pneumatic/electrical plastic lined bellows control valve is one of the leading products of Fluorine Tight Pipe Valve Group. This valve is the executive unit of automation instrumentation system, which is installed on the medium conveying pipeline and used in conjunction with other instruments to control the flow rate and other parameters. The valve body and the inner parts of the valve in contact with the fluid are made of high temperature molded fluorine lining process, and the inner cavity of the metal valve body has a dovetail groove structure for preventing dislodgement, so that the lining material is completely adhered to the metal body, prolonging the service life of the valve, and it has reliable sealing and is suitable for controlling the medium which is highly poisonous, valuable, volatile and easy to infiltrate, and it is widely used in automation devices in the industrial sectors of petrochemicals, electric power, metallurgy, and papermaking.