ADCA AVM/AVF234S electric actuator

HVAC water system: used for two-way or three-way regulating valves to control the flow of cold or hot water.

Process fluid regulation: Proportional regulation of various liquids and gases in chemical and pharmaceutical plants.

Fault safety scenario: Select AVF234S and automatically place the valve in a safe position when power is cut off (such as closing toxic gas pipelines or opening cooling water bypass).

Selection Guide and Precautions

When choosing AVM234S or AVF234S, the following factors should be considered:

Do you need spring reset: If the valve is required to return to the predetermined safe position after power failure, select AVF234S; Otherwise, choose AVM234S to reduce costs and achieve slightly larger travel (49mm vs 40mm) and slightly higher thrust (2.5kN vs 2.0kN).

Power supply voltage: Power supplies available on site (230V, 110V, 24V AC/DC), please note that the 24V DC version can also be used for 24V AC, but ripple needs to be confirmed.

Control signal: PLC output type (analog or switch), whether position feedback is required.

Medium temperature: If it exceeds 130 ℃, a high-temperature adapter should be selected; If the temperature exceeds 180 ℃, a 240 ℃ adapter must be selected.

Environmental temperature: Ensure it is within the range of -10~55 ℃, otherwise special heating or cooling measures are required.

Travel requirements: Measure the valve travel, with a maximum of 49mm for AVM234S and 40mm for AVF234S. If it exceeds the range, the model needs to be changed.

Operating speed: Select 10/15/30 mm/min according to the system response requirements.

Summary of Installation and Debugging Steps

Mechanical installation: Fix the actuator onto the valve body through brackets and couplings to ensure concentricity.

Electrical wiring: Connect according to the wiring diagram based on the selected control mode and power supply. The grounding terminal must be reliably grounded.

Pre power on inspection: Confirm that the power supply voltage is consistent with the actuator nameplate; Manually operate the disengagement mechanism and check if the valve operates smoothly.

Automatic travel adaptation: After the power is turned on, the actuator will automatically perform a full travel adaptation (indicator light flashes) without manual intervention. If you need to re adapt, you can press the reset button or power off and restart.

Characteristic curve selection: Set linear, quadratic, or equal percentage through DIP switch.

Run test: Provide 0%, 50%, and 100% control signals and observe whether the valve position and feedback signal correspond. For 3-point step control, test the on/off function.

Manual operation verification: After power off, disconnect the motor and manually rotate the drive shaft to confirm that the valve can be fully opened and closed.

Maintenance and troubleshooting

Regular inspection: Every 6 months, check whether the cable joints are loose, whether the protection level is maintained, and whether the push rod seal is leaking.

Spring reset test (AVF234S): Cut off the power and confirm that the actuator can return to the fault safe position within the specified time. If it exceeds the time limit or gets stuck, it may cause spring fatigue or increased mechanical resistance.

Common faults and possible causes:

The actuator does not operate: no power supply, control signal error, motor thermal protection triggered, manual disconnection not reset.

Inaccurate travel: incomplete automatic adaptation, valve jamming, loose coupling.

Abnormal position feedback: worn potentiometer (if used), disconnected wiring.

LED indication abnormality: Control signal type mismatch or signal out of range.

Repair: Internal electronic modules and motor components are usually repaired by the manufacturer, and only fuses (if any) can be replaced or external wiring checked on site.

Compliant standards and certifications

The AVM234S/AVF234S series actuators are produced in accordance with the reasonable engineering practices of the European Pressure Equipment Directive (PED) and comply with:

EN 60529（IP66）

IEC 60730 (Automatic Electrical Control)

EN 61000-6-2 / -6-4（EMC）

EN 60730-1/-2-14 (low voltage)