ZJHP pneumatic film single-seat control valve is composed of multi-spring pneumatic diaphragm actuator and low-flow resistance small single-seat control valve body. Pneumatic single-seat control valve 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 multi-spring actuator is low in height, light in weight and easy to install. The pneumatic single seat control valve is equipped with a valve positioner to convert the current signal into a corresponding linear displacement, and automatically controls the opening of the regulating valve to achieve continuous adjustment of the process parameters such as pressure, flow, temperature and liquid level of the fluid in the pipeline. Pneumatic film single seat control valve is widely used in precise control of gas, liquid, steam and other media, especially suitable for work situations that allow small pressure difference and allow small leakage. The pneumatic diaphragm single seat control valve is stable in operation with reliable operating characteristics, small valve seat leakage, precise flow characteristics, and wide adjustable range. It will surely achieve high quality control effects in a wide range of applications with its unique advantages