ZJHM pneumatic film single-seat control valve is composed of pneumatic film multi-spring actuator and small-sized sleeve valve. The fine and small pneumatic film sleeve regulating valve adopts a top guide structure and is equipped with a multi-spring actuator. It has the advantages of compact structure, light weight, sensitive action, S streamlined fluid channel, small pressure drop loss, large valve capacity, accurate flow characteristics, and convenient disassembly and assembly. It is widely used to accurately control the process parameters of gas, liquid and other media to keep the pressure, flow, temperature, and liquid level at a given value.