The ZJHP/M pneumatic diaphragm regulating valve consists of a multi-spring pneumatic diaphragm actuator and a low flow resistance fine regulating valve body. The multi-spring actuator is low in height, light in weight and easy to install. The pneumatic diaphragm regulating valve body flow path is S streamlined, which has the advantages of compact structure, light weight, sensitive action, small pressure drop loss, large valve capacity, accurate flow characteristics, and convenient maintenance. It can be used in demanding working conditions. The pneumatic diaphragm regulating valve is equipped with an electric-gas valve positioning or a pneumatic valve locator, which can realize automatic adjustment control of the fluid medium of the process pipeline. Fine small pneumatic control valve is widely used in precise control of gas, liquid, steam and other media process parameters such as pressure, flow, temperature, liquid level and other parameters to maintain a given value. The precision small pneumatic control valve is especially suitable for occasions where the leakage is small, the pressure difference between the valve is small, and there is a certain viscosity and a small amount of fiber medium