Pneumatic control valve dual-oriented structure, equipped with multiple spring actuator, pneumatic control valve with a compact, lightweight, quick action valve capacity, flow characteristics of precision, and easy disassembly. Pneumatic control valve is widely used for precise control of the gas, liquid, steam and other media, plus parameters such as pressure, flow, temperature, liquid level is maintained at a given value. Especially suitable for allowing small pressure, but also less pressure to allow small amount of leakage in the workplace. This series of pneumatic control valve products have a variety of varieties of standard type, bellows seal type, jacket insulation type. Nominal grade products are PN10,16,40,64; body diameter range of DN20 ~ 200. For fluid temperature from -200 ℃ ~ + 560 ℃, within the scope of various grades. Leakage standards Class II or Class IV. Flow characteristics are linear or equal percentage. Choose from a variety of different specifications.