Electrical valve positioner controls electric valves
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This post was last edited by liuei on 2010-4-21 at 18:57. I want to use a double-acting electrical valve positioner to supply air to two pressure switches in order to control the valve operated by an electric actuator. Is that possible?
Electrical positioners are used to control pneumatic valves; they cannot be used to control electric valves!
I don’t understand what the original poster wants to do Electrical positioners are used to control pneumatic valves. If an electric actuator needs to be adjusted, a control board can be added
An electrical positioner controls the opening degree of a pneumatic valve by regulating the air supply volume. It has nothing to do with electric valves; if electric control is needed, a control board is required!
I want to use an electrical positioner to replace the servo controller. There are spare parts for electrical positioners, but purchasing servo controllers requires approval, and it’s taken a very long time!
Replace the servo controller with an electrical positioner? I’ve never heard of it. May I ask? A servo controller is a device used to control servo motors; it generally controls these motors through position, speed, and torque to achieve precise positioning in transmission systems. Structurally, servo controllers are similar to frequency converters, but they require higher precision and reliability from their components. The electrical positioner is used in conjunction with a pneumatic actuator; it converts an input signal of 4–20 mA DC into an output air pressure that controls the operation of the actuator. Feedback is provided based on the actuator’s movement, thereby enabling precise positioning of the actuator in accordance with the control signal
Your approach is really unique; in theory it’s feasible, but it requires very high standards for the locator. Moreover, achieving full-range control is difficult. When will you carry out this experiment and share the results?
It seems difficult – how does a pressure switch achieve full-range control? I need to learn about it*