Pneumatic low-temperature control valve is widely used in the automatic control of petroleum, chemical, metallurgy and other industrial sales process. Pneumatic low-temperature control valve it is especially suitable for -60 ~ -250 ℃ low-temperature state of the medium (such as liquid oxygen, liquid nitrogen, etc.) regulation. It is one of the pneumatic control valves developed by our company specifically for ultra-low temperature working conditions. Pneumatic low-temperature control valve in order to ensure the accuracy of regulation, must be equipped with a valve positioner. The difference between it and the normal temperature control valve is that it adopts long-neck type upper bonnet, which makes the packing work under normal temperature. Pneumatic low-temperature control valve by the valve positioner to give the signal pressure input to the pneumatic thin-film actuator gas chamber, resulting in thrust, through the connection of the rod to drive the spool, the spool position changes so that the valve's circulation cross-section area changes, to achieve the adjustment of the media flow.

Product features

Simple control, fast response, and intrinsically safe, without the need to take additional explosion-proof measures. Pneumatic control valve is compressed air as a driving force, to achieve switching or proportional adjustment, the source of the cylinder as an actuator, receiving industrial automation control system control signals to complete the adjustment of pipeline media flow, pressure, temperature and other process parameters.

Execution standard

Design and manufacture: ASME B16.34, GB/T 12224

Structure length: ASME B16.10, GB/T 12221

Connecting flange：ASME B16.5、GB/T 9112～9124、HG/T 20592、HG/T 20615、JB/T 79

Inspection and test: API 598, GB/T 26480