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When selecting pneumatic valve actuators,
several key factors need to be considered:
Output torque and force: It is essential to
accurately calculate the torque or force required to operate the valve. This
depends on the valve type, size, and the pressure and medium of the pipeline.
The selected actuator should provide sufficient output to ensure the valve can
open and close smoothly and reliably under various working conditions.
Actuator type: Pneumatic actuators include
double - acting and single - acting types. Double - acting actuators are
suitable for applications that require rapid response and precise control in
both directions. Single - acting actuators, with spring return, are often
chosen for applications where fail - safe operation is crucial.
Environmental conditions: Consider the
temperature, humidity, and corrosiveness of the working environment. In high -
temperature environments, select heat - resistant materials. In corrosive
environments, choose actuators with corrosion - resistant coatings or
materials.
Control requirements: Determine whether the
actuator needs to achieve proportional control, on - off control, or other
specific control modes. Also, consider the response time and control accuracy
requirements to ensure the actuator can meet the process control needs.
Air supply requirements: Check the required
air pressure and flow rate of the actuator. Ensure that the air supply system
can provide sufficient air volume and pressure to ensure the normal operation
of the actuator.
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