Flow control pneumatic upward expansion valve is a pneumatic actuator specially used to control the flow rate of gas or liquid, usually used in automatic control systems. Its main function is to adjust the medium flow through the valve body by adjusting the valve opening, so as to achieve precise control of system pressure and flow Pneumatic Upward Expansion Valve is widely used in flow control. In addition, our company also produces other valves for industrial production: Electric Control Valve, Pneumatic Control Valve, Self-operated Pressure Control Valve, etc. If you need, please contact us.