ADCA AVM/AVF234S electric actuator

ADCA high-efficiency electric actuator: AVM/AVF234S

In industrial automation and HVAC systems, the accuracy, reliability, and energy efficiency of valve actuators directly affect the control quality of the entire system. The AVM234S and AVF234S series linear electric actuators are ideal choices in the fields of steam humidification, drain valve control, and process regulation due to their automatic stroke adaptation, high protection level, compatibility with multiple control signals, and fail safe functions. This article will provide a comprehensive and in-depth technical interpretation of the series of actuators from the dimensions of product design, core features, technical parameters, control modes, optional accessories, electrical connections, mechanical dimensions, and typical applications.

Product positioning and design background

AVM234S and AVF234S are electric actuators designed specifically for valve linear drive, particularly suitable for TDS (Total Dissolved Solids) control systems consisting of DSH series direct steam injection humidifiers and VCP drain valves. The main difference between the two is that the AVF234S has a spring reset function, which drives the actuator to the preset fail safe position (push rod extension) in the event of power failure or interruption, while the AVM234S does not have a spring reset function.

Both actuators support automatic detection of valve travel, achieving high-precision activation, while also having extremely low operating noise and high energy efficiency. Its IP66 protection level enables it to operate stably in humid and dusty environments.

Summary of Main Characteristics

IP66 protection level: completely dust-proof, can withstand strong water spray, suitable for harsh industrial environments.

Automatic detection of control signals: The control signal type (0... 10 V, 4... 20 mA, 2-point or 3-point step control) is automatically identified through LED indicator lights.

Adjustable characteristic curve: Linear, quadratic, or equal percentage characteristics can be selected through DIP switches to adapt to different valve flow characteristics.

Automatic travel adaptation: The actuator can automatically detect and adapt to the actual travel of the valve without manually setting limits.

Manual operation: The motor gearbox can be detached and operated with a manual wrench for easy debugging and emergency situations.

Mechanical travel indicator: an externally visible mechanical indicator that displays valve opening in real-time.

Spring reset (AVF234S only): After power failure, the spring drives the push rod to extend, achieving fault safe closing or opening (depending on the installation direction).

Multiple control inputs: Supports 2-point control, 3-point step control, analog 0... 10 V or 4... 20 mA.

Optional accessories: Split range adjustment unit, auxiliary contacts, potentiometer, high temperature adapter, etc.

In depth analysis of technical specifications

1. Power supply and power consumption

AVM234S and AVF234S support multiple power versions:

230 V 50/60 Hz

110 V 50/60 Hz

24 V 50/60 Hz

24 V DC

In terms of power consumption:

24V version: 10 W (20 VA)

230 V version: 13 W (28 VA)

When designing, it is necessary to configure a transformer with sufficient capacity according to the selected voltage, otherwise it may cause actuator failure.

2. Running time and itinerary

The motor operating speed can be configured to select three gears:

10 mm/min（0.17 mm/s）

15 mm/min（0.25 mm/s）

30 mm/min（0.50 mm/s）

Spring reset time (AVF234S only): 15 to 30 seconds (within the range of travel 14... 40 mm), regardless of the set motor running time.

Actuator travel:

AVM234S：0…49 mm

AVF234S：0…40 mm

drive:

AVM234S：2.5 kN

AVF234S：2.0 kN

Spring reset life: greater than 40000 times.

3. Positioner and control parameters

Control signal 0... 10 V: Input impedance 100 k Ω

Control signal 4... 20 mA: Input impedance 50 Ω

Position feedback 0... 10 V: load>2.5 k Ω

Starting point (U ₀): can be set to 0 V or 10 V

Control range (Δ U): 10 V

Switch range (Xsh): 300 mV

These parameters enable the actuator to interface directly with the vast majority of PLCs, DDCs, or process controllers without the need for additional signal conditioning.

4. Environmental conditions

Working temperature: -10 ℃ to+55 ℃

Medium temperature (conducted through valves): up to 130 ℃ (if using a high-temperature adapter, it can reach 180 ℃ or 200 ℃)

Environmental humidity:<95% RH, no condensation

Protection level: IP66 (EN 60529)

Protection level: III (IEC 60730)

EMC Directive: 2014/30/EU, compliant with EN 61000-6-2 (immunity) and EN 61000-6-4 (emission)

Low Voltage Directive: 2014/35/EU, compliant with EN 60730-1 and EN 60730-2-14

Overvoltage category: III

Pollution level: III

Control mode and automatic detection

The actuator supports multiple control modes, automatically recognized through DIP switch selection and LED indication:

2-point control: switch signal (on/off), suitable for simple switch valve applications.

3-point step control: Two switch signals (on/off/off) can achieve precise position control, and can be optionally paired with a potentiometer.

Analog control: 0... 10 V or 4... 20 mA, continuously adjustable, suitable for regulating valves.