DY22F-25P Low Temperature Pressure Boosting Control Valve

5421 low-temperature pressure reducing regulating valve, DY22F pressure reducing regulating valve, DY22F-16P low-temperature pressure reducing regulating valve,

Overview of Low Temperature Regulating Valve:
Low temperature regulating valve is a modified product of single and double seat regulating valves. It differs from the ambient temperature regulating valve in that it uses a long necked upper valve cover to keep the packing working at room temperature. Suitable for regulating media (such as liquid oxygen, liquid nitrogen, etc.) at low temperatures ranging from -60 to -250 ℃. To ensure adjustment accuracy, a valve positioner must be used.

Structural principle of low-temperature regulating valve:
The low-temperature regulating valve consists of a pneumatic thin film actuator and low-temperature resistant single and double seat valves. The signal pressure from the regulator is input into the air chamber of the pneumatic diaphragm actuator, generating thrust. The valve core is driven by the connecting rod, and the change in the position of the valve core changes the flow cross-sectional area of the valve, achieving the regulation of the medium flow rate.

Precautions for installation and use of low-temperature regulating valve:
1. It should be installed vertically on a horizontal pipeline. In special cases where horizontal or inclined installation is required, support should generally be added. The circular board installed on the insulation box wall should be parallel to the insulation box wall.
2. It should be installed near the ground or floor for maintenance and repair purposes. For those equipped with valve positioners or handwheel mechanisms, it is even more important to ensure easy observation, adjustment, and operation.
3. Generally, a bypass pipeline is set up to switch to manual operation in case of automatic control system failure or maintenance of regulating valves, so as not to stop production.
4. When equipped with a handwheel mechanism, manual operation of the bypass pipeline can also be omitted, and it can also be used to limit the opening of the valve. When stopped, the handwheel mechanism must be restored to its original neutral position to facilitate the normal operation of the self-control system.
5. During installation, the flow direction of the medium should be aligned with the direction indicated by the valve body.
6. Before installing the regulating valve, the pipeline should be cleaned of dirt and welding slag. After installation, fully open the regulating valve, clean the pipelines, valves, etc., and test the sealing of each connection.

All valves of Shanghai Xianyi Low Temperature Valve Co., Ltd. have undergone low-temperature treatment, and commonly used products are suitable for temperatures ranging from -196 ℃ to+80 ℃. Varieties include: low-temperature valves; Low temperature shut-off valve; Low temperature and high pressure shut-off valve; Low temperature ball valve; Low temperature check valve; Liquefied natural gas valves; Oxygen valve; Low temperature safety valve; Low temperature needle valve; Low temperature regulating valve; Low temperature throttle valve; Valve of air separation equipment; Low temperature throttle valve; Low temperature gate valve; Air compressor accessories; Special valves; Low temperature needle valve; Low temperature safety valves are widely used in industries such as metallurgy, petrochemicals, aerospace, nuclear industry, railways, etc