How do modulating actuators (motorized valves) work?
When you install the DCL regulating type electric control valve on the pipeline, you can control the opening of the valve through the analog signal of 4~20mA, 0~10V, so as to realize the function of regulating the fluid flow.
Control of DCL actuator using 4~20mA
- The actuator adjusts the valve opening according to the 4~20mA input signal in a linear relationship; 4mA corresponds to the valve fully closed and 20mA corresponds to the valve fully open.
- When the input signal is out of range, the actuator enters the lost signal mode. Depending on the user setting, the actuator drives the valve to fully open, fully close, or maintains the position of the valve at the time of the loss of signal.
NOTE: The above circuit diagram shows the function of a switching actuator (motorized valve) in its simplest form. In practical applications, additional protection devices such as fuses and current limiters should also be considered.
Use 2~10V to control DCL actuator
- The actuator adjusts the valve opening according to the 2~10V input signal in a linear relationship; 2V corresponds to the valve fully closed and 10V corresponds to the valve fully open.
- When the input signal is out of range, the actuator enters the lost signal mode. Depending on the user setting, the actuator drives the valve to fully open, fully close, or maintains the position of the valve at the time of the loss of signal.
NOTE: The above circuit diagram shows the function of a switching actuator (motorized valve) in its simplest form. In practical applications, additional protection devices such as fuses and current limiters should also be considered.
Motorized valve status
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