english 
Pneumatic valve actuators are widely used
in the chemical industry due to their reliable performance and precise control.
Here are some of their main applications:
Flow control: In chemical production
processes, pneumatic valve actuators are used to accurately control the flow
rate of various chemical fluids and gases. They can adjust the opening degree
of valves according to the process requirements, ensuring the stability and
accuracy of material flow. For example, in the production of petrochemicals,
they are used to control the flow of crude oil, refined oil, and various
chemical intermediates.
Pressure regulation: Pneumatic valve
actuators play a crucial role in maintaining the pressure of chemical reaction
vessels and pipelines. They can sense the pressure changes in the system and
adjust the valve opening to keep the pressure within the set range. This is
particularly important in high - pressure chemical processes to prevent over -
pressure and ensure the safety of the equipment and the entire production
process.
On - off control: In some chemical
processes, such as batch - type production or the control of specific process
steps, pneumatic valve actuators are used for on - off control. They can
quickly open or close the valves to start or stop the flow of materials,
enabling precise control of the process sequence and improving production
efficiency.
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