ZJHP pneumatic film single-seat control valve is composed of pneumatic film multi-spring actuators and small size low flow resistance single-seat valve. Pneumatic film single-seat control valve adopts top guide structure and is equipped with multi-spring film actuators. It has the advantages of compact structure, light weight, sensitive action, streamlined fluid passage, low pressure drop loss, large valve capacity, accurate flow characteristics, and convenient disassembly and assembly. It is widely used in the precise control of gas, liquid, steam and other media, and the process parameters such as pressure, flow, temperature, and liquid level are kept at a given value. It is especially suitable for working occasions where the allowable leakage is small and the pressure difference between the front and rear of the valve is not large.