When you install a DCL 24V ON-OFF type electric control valve on a pipeline, you can control it using a relay, ON-OFF control, or PLC (DCS), enabling the opening or shutting off of fluid flow.

This guide explains how the DCL 24V ON-OFF type electric actuators function using relays, PLCs, or ON-OFF control for valve operation.

Using Relay/PLC/DCS to Control DCL Actuators

  • When the relay switches the power (+) line to the “ON” input terminal and the power (-) line to the “OFF” input terminal, the actuator drives the valve open. Once fully open, the actuator stops, and the electric valve remains open.

  • When the relay switches the power (+) line to the “OFF” input terminal and the power (-) line to the “ON” input terminal, the actuator drives the valve closed. Once fully closed, the actuator stops, and the electric valve remains closed.

  • If power is lost while the actuator is in operation, the actuator stops driving, and the electric valve stays in its current position.

  • If your actuator is equipped with a heater and dehumidifier, keep the power supply on after the actuator reaches the fully open or fully closed position.

Remarque : The circuit diagram provided illustrates the basic function of an ON-OFF type actuator (electric valve). In practical applications, fuses, current limiters, and other protective components should be added.

Using Switches to Control DCL Actuators

dc24v-switch-actuator-first-step-with-switch

  • When an ON-OFF control switches the power (+) line to the “ON” input terminal and the power (-) line to the “OFF” input terminal, the actuator drives the valve open. Once fully open, the actuator stops, and the electric valve remains open.

  • When an ON-OFF control switches the power (+) line to the “OFF” input terminal and the power (-) line to the “ON” input terminal, the actuator drives the valve closed. Once fully closed, the actuator stops, and the electric valve remains closed.

  • If power is lost while the actuator is in operation, the actuator stops driving, and the electric valve stays in its current position.

  • If your actuator is equipped with a heater and dehumidifier, keep the power supply on after the actuator reaches the fully open or fully closed position.

Remarque : The circuit diagram provided illustrates the basic function of an ON-OFF type actuator (electric valve). In practical applications, fuses, current limiters, and other protective components should be added.

Electric Valve Status

  • Closed Position

  • Fully Open Position