AZBIL MY5010F0500 Electric Proportional Actuator

Model Code Definition

MY5010: Standard torque electric regulating valve actuator of MY5000 series, compatible with DN15～DN80 valves

F: Multi-function proportional control type (multi-signal input with position feedback)

0500: Version code, supports 4-20mA / 0-10V / 2-10V analog input and 2-10V valve position feedback output

Core Technical Specifications

Application Scenarios

Matched with VY51xx series Azbil 2-way/3-way steam or water valves as electric proportional regulating valves for HVAC, heating, boiler and process water systems. It works with DDC systems for continuous analog control of flow rate and temperature.

Same Series Comparison

MY5010F0100: Potentiometer signal type

MY5010F0500: Universal analog type (4-20mA/0-10V/2-10V with 2-10V feedback)

Troubleshooting Guide

1. Valve no movement: Check AC24V power supply, terminal wiring and verify signal source output;
2. Deviation between valve position and setpoint: Inspect zero/span calibration and feedback circuit load;
3. Stuttering movement: Check valve stem mechanical seizure and internal gear wear of actuator;
4. No osition feedback: Confirm feedback output load ≥10kΩ and check for broken wiring.

Alternative Solutions

Original Azbil same series: MY5010F0100 (potentiometer signal only, signal incompatible)

Domestic alternatives: Siemens SQX series, Honeywell ML74 series electric proportional actuators. Torque, stroke, signal type and mounting bracket dimensions must be verified.

HS Code Reference

84819010 (Valve actuator, valve spare parts)

Typical Application Cases of AZBIL MY5010F0500

Matched Valve Body: VY51 series 2-way/3-way ACTIVAL regulating valves (DN15～DN80); Signal: 4-20mA / 0-10V / 2-10V input, 2-10V valve position feedback, AC24V power supply. Suitable for BMS and small-scale process temperature closed-loop control.

Case 1: Chilled Water Regulation for AHU in Large Commercial Complexes (Most Common)

System: Air handling unit, BMS/DDC (Azbil Infilex, Honeywell, Siemens DDC)

Valve Assembly: VY51 2-way equal percentage valve + MY5010F0500

Control Logic: Duct temperature collected by Pt100 → DDC outputs 4-20mA to actuator, continuously regulating chilled water flow to stabilize supply air temperature; 2-10V valve position feedback sent back to BMS for real-time valve opening display on HMI

Advantages: Multi-signal compatibility, supports direct switching between 0~10V/4-20mA; IP54 rated, can be installed inside AHU cabinet; manual valve stem operation for maintenance

Applicable Projects: Office buildings, shopping malls, airport terminals, exhibition centers for new construction or retrofit

Case 2: Hot Water & Steam Temperature Control Loop for Hospital Clean Operating Rooms

System: Clean air conditioning, constant temperature & humidity unit for operating rooms, preheating steam regulation for sterilization

Valve Assembly: VY51 high-temperature 2-way steam valve + MY5010F0500

Control Logic: DDC receives room temperature & humidity signals for closed-loop control, outputs analog signal to regulate hot water/steam and stabilize clean zone temperature; valve position feedback used for BEMS energy consumption statistics and fault alarm

Features: High stability and low leakage required for hospital projects; actuator can operate stably at -20~+40℃ long-term; valve position monitoring supports remote diagnosis

Notes: High-temperature valve body must be selected for steam service; keep actuator away from high-temperature radiation

Case 3: Secondary Side Temperature Control for Central Heating & Domestic Hot Water Heat Exchanger Stations in Hotels

System: Plate heat exchanger, primary side steam / high-temperature hot water, secondary side domestic hot water and heating water

Valve Assembly: VY51 3-way mixing valve or 2-way valve + MY5010F0500

Control Logic: Closed-loop control based on secondary outlet water temperature; DDC adjusts primary medium flow; 3-way valve performs cold-hot water mixing to maintain constant supply water temperature; valve position feedback for load analysis and energy saving optimization

Strength: One actuator compatible with multiple control signals; compatible with old and new DDC systems during heat station renovation, reducing spare part types

Case 4: Process Cooling Water (PCW) Regulation in Pharmaceutical & Food Clean Workshops

System: Process cooling water PCW loop, jacket temperature control for equipment (fermenters, reaction vessels, freeze dryer pre-cooling)

Valve Assembly: VY51 2-way chilled water valve + MY5010F0500

Control Logic: PLC collects jacket temperature and outputs 4-20mA to control valve, continuously adjusting cooling water flow; valve position feedback uploaded to PLC for loop monitoring, alarming and trend recording

Key Points: Select valve body with stainless steel trim for deionized water medium; IP54 actuator suitable for general clean workshop environment; not suitable for direct installation in spray or high-humidity areas

Case 5: Chilled Water Branch Regulation for Precision Air Conditioners in IDC Data Centers

System: Precision air conditioning chilled water branch in IDC room, chilled water flow regulation for individual precision air conditioner

Valve Assembly: VY51 2-way valve + MY5010F0500

Control Logic: Closed-loop control based on room return air temperature; BMS outputs analog signal to adjust chilled water flow; valve position feedback for pipeline hydraulic balance monitoring and early fault warning (setpoint-feedback deviation alarm)

Value: High continuous operation reliability required by data centers; valve position feedback can detect valve stem seizure and actuator drift in advance to prevent server overheating shutdown

Case 6: Campus / Park Heat Station, Secondary Heating Network Temperature Control in Winter

System: Central heat exchange station for park, constant temperature control of secondary heating supply water

Valve Assembly: VY51 3-way diverting / mixing valve + MY5010F0500

Control Logic: Outdoor temperature compensated control; DDC automatically adjusts primary heat medium, secondary supply water temperature dynamically changes with outdoor temperature for energy saving; valve position feedback for thermal energy consumption metering and analysis

General Selection & On-site Installation Notes

1. MY5010F0500 only matches VY51 series ACTIVAL rotary ball valves, cannot be directly fitted to ordinary globe valves; applicable diameter DN15~DN80, not available beyond this range
2. 2-10V position feedback load ≥10kΩ, otherwise feedback signal distortion occurs, which is the most common on-site fault
3. Outdoor installation must be upright with sunshade and rain protection; IP54 rating is not for permanent heavy rain exposure
4. Max allowable fluid temperature is 175℃. For higher temperature, select high-temperature valve body and install heat insulation bracket to avoid actuator damage from heat conduction

Common Field Failures in Above Projects

Normal command signal but large deviation of valve position feedback: Zero/span calibration missing, insufficient feedback circuit load

Slow movement: Excessive AC24V supply voltage drop or valve stem mechanical seizure

No feedback: Wrong terminal wiring or insufficient input impedance of upper acquisition module

Working Principle of AZBIL MY5010F0500 Electric Proportional Rotary Actuator

MY5010F0500 is a continuous analog controlled electric rotary proportional actuator, specially designed to drive VY51 series rotary ball valves (90° angle stroke). It receives analog setpoint from DDC/PLC and outputs 0~90° rotation of valve shaft, meanwhile provides 2~10V valve position feedback to realize closed-loop valve position control.

Core: Built-in servo control circuit + motor reduction mechanism + angular displacement potentiometer, forming local closed loop inside actuator, not open-loop motor control.

1. Overall Workflow
2. Receive External Control Command

Analog control signals from external BMS/DDC/PLC:

0~10V / 2~10V voltage signal

4~20mA current signal

Signals go through built-in signal conditioning circuit and converted into target valve position setpoint (corresponding to 0°~90°).

2. Acquire Actual Current Valve Position (Internal Feedback)

The actuator output shaft couples with built-in angular displacement potentiometer, which detects real-time rotation angle of valve shaft and converts it into measured actual valve position.

✅ Distinguish two types of feedback:

Internal potentiometer feedback: Sent to actuator servo board for local closed-loop positioning (ensure positioning accuracy)

2~10V external output feedback: Buffered signal derived from internal valve position, transmitted to upper BMS/PLC for remote monitoring (the 2~10V valve position output of MY5010F0500)

3. Servo Comparison & Drive (Core Principle)

The circuit board compares the target setpoint with measured valve position from potentiometer:

Setpoint actual position → drive motor forward rotation (valve opening)

Setpoint < actual position → drive motor reverse rotation (valve closing)

Setpoint ≈ actual position → motor stops, valve maintains current opening

4. Reduction Gearbox for Torque Amplification

Small-power synchronous motor → multi-stage composite plastic & metal reduction gears, reducing speed and amplifying torque to rotate valve stem at 0~90° angle stroke.

Fixed full stroke time (63s @50Hz, 53s @60Hz). It adopts low-speed proportional regulation to avoid impact on valve trim.

5. Manual Operation (Emergency)

When power is off, wrench can directly rotate output shaft for manual valve on/off. The internal potentiometer synchronously follows rotation; actuator automatically recognizes current valve position after power restoration.

2. Electrical & Signal Principle

Power supply: AC24V for motor and control board; weak analog control signal is electrically isolated from main power supply

Signal input selection: Onboard jumper allows field switching of signal type (4-20mA / 0~10V /2~10V)

External valve position feedback output: 2~10V DC

2V = 0% opening (valve fully closed)

10V =100% opening (valve fully open)

It is an active voltage output. The input impedance of upper acquisition module must be ≥10kΩ, otherwise feedback voltage will be pulled down and reading distorted (one of the most frequent site problems).

3. Protection Functions
4. Stall Protection: When mechanical seizure occurs (valve stem stuck), overload detection stops motor drive to protect motor and gears from burnout.
5. Stroke Limit: Internal electronic limit automatically cuts off motor drive at 0% and 100% stroke, no external mechanical limit switches required.
6. Position Hold on Power Loss: Actuator holds current valve position upon power loss (no spring return!), classified as power-fail hold actuator.

⚠️Important: MY5010F0500 has no spring return. Valve stays at current position when power fails. It cannot be used for applications requiring fail-safe action (fail open / fail close).

4. Brief Summary of Control Logic

Upper system sends opening command → Actuator main board compares target setpoint vs measured valve position from internal potentiometer → Deviation drives motor and reduction gears to rotate valve shaft → Motor stops once measured position matches target setpoint; meanwhile valve position is converted to 2~10V signal and uploaded to BMS.

5. Difference from On/Off Electric Actuators

On/Off actuator: Only fully open / fully closed two positions, no continuous positioning

MY5010F0500: Proportional servo closed-loop, stable holding at any intermediate opening, used for continuous flow and temperature regulation, suitable for AHU, heat exchanger station and process chilled water closed-loop temperature control.