Compact Quarter Turn Electric Valve Actuator
Compact 0°–90° quarter-turn electric actuators (30 Nm to 2000 Nm) for ball valves, butterfly valves, plug valves, and dampers — featuring ISO 5211 direct mounting and integrated overheat protection.
Compact Quarter Turn Electric Valve Actuator
Item Number: HEA Series | Torque 30 Nm to 2000 Nm
Output Torque: 30 Nm to 2000 Nm
Power Supply: 220V/110V AC, 380V AC (3Ph), 24V DC/AC
Control Options: On/Off, Built-in Modulating (4-20mA), Smart Modbus (RS485)
Travel Adjustment: ±10° mechanical adjustment via rear screw
Mounting Standard: ISO 5211 / DIN 3337 direct mounting with double-square socket
Protection Class: Weatherproof IP67
Certifications: ISO 9001, CE, EAC, RoHS, SIL3
OEM Customization: Flexible options for motors, limit switches, handwheels, indicators & RAL colors
Delivery Lead Time: Fast 15–25 days for bulk wholesale orders
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Custom Actuator Housing Color
We customize compact quarter turn electric valve actuator housing colors (RAL/Pantone) with durable epoxy powder coating to match your corporate brand identity, system color-coding, or specific project aesthetic requirements.
Custom OEM Label
We offer private label solutions for distributors and OEM valve makers. Choose corrosion-resistant metal plates (stainless/aluminum) with laser-etched logos, or high-tack weatherproof industrial stickers.
18-Month Factory Warranty
Every compact quarter turn electric valve actuator includes an 18-month warranty from the shipment date, providing a 6-month buffer beyond industry standards for ocean transit, customs clearance, and warehouse stocking.
Description of HEA Series Compact Quarter Turn Electric Valve Actuator
The HEA Series compact quarter turn electric valve actuator provides automated 0°–90° (up to 270°) rotation control for ball valves, butterfly valves, dampers, and plug valves. Built for global OEM valve factories and wholesales. Available in three main control types: On/Off Type, Modulating Type and Integrated Type.
Specifications & Features:
- ±10° Rear Screw Travel Adjustment: Easy adjustment using the rear screw on the back of the actuator housing for exact valve seating alignment.
- Weatherproof IP67 Housing: Anodized aluminum housing with epoxy polyester powder coating.
- Motor Overheat Protection: Class F insulated motor with an internal thermal switch that automatically stops the motor at 120°C.
- Self-Locking Worm Gear: Quiet operation (under 50 dB) with built-in self-locking to prevent valve back-driving. Pre-lubricated with molybdenum grease.
- ISO 5211 Direct Mounting: Standard ISO 5211 flange with double-square socket for direct connection to square or 45° rotated valve stems.
- Captive Cover Bolts: Stainless steel housing bolts stay attached to the cover during disassembly to prevent lost hardware.
- HEA Series Electric Actuator Certificates:ISO 9001, CE, EAC, RoHS, SIL3
- Custom OEM Options: Tailored hardware components (motors, microswitches, handwheels, cable glands) and private label branding (laser logo, custom nameplates, custom RAL colors).
- Custom Housing Colors: Optional RAL color matching (Yellow, Red, Black, Gray, etc) to align with your proprietary valve lines
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Partner with Hearken for consistent quality, OEM branding, and reliable bulk supply.
HEA Series Compact Quarter Turn Electric Valve Actuator: Control & Signal Options
Our HEA Series compact quarter turn electric valve actuator offers ON-OFF power switching as well as 4–20mA, 0–10V, and Modbus (RS485 RTU) options across flexible models.
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| On/Off Type | Modulating Type | Modulating Type with LCD | Integrated Smart Type |
| Control Method: Standard power-switching (ON/OFF) for basic fully open or fully closed valve operation. Function: Equipped with passive limit switches for open/close position feedback signals sent directly to the PLC or central control cabinet. | Signals & Protocol: 4–20mA / 0–10V control signals + Modbus (RS485 RTU) communication. Function: Compact proportional control module without an LCD screen or local push buttons; directly controlled and monitored via analog signals from the PLC or central control cabinet. | Signals & Protocol: 4–20mA / 0–10V control signals + Modbus (RS485 RTU) communication. Function: Features an integrated LCD display screen and local push buttons for direct visual status monitoring and parameter calibration, interfacing seamlessly with the PLC or control cabinet. | Signals & Protocol: 4–20mA / 0–10V control signals + Modbus (RS485 RTU) communication. Function: Intelligent integrated controller with an LCD screen and local/remote control capability. Supports field switching between ON/OFF and modulating modes, connecting directly to the central PLC or control cabinet. |
HEA Series Compact Quarter Turn Electric Valve Actuator: Mechanical Options
We offer different mechanical parts for HEA compact quarter turn electric actuator, including heavy or lightweight housings, visual indicators, and manual handwheels. This helps you meet specific job requirements while keeping product and shipping costs down.
| Actuator Housing | Top Cover | ||
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| Standard Aluminum Housing | Economy Aluminum Housing (Option) | Standard Aluminum Cover | Economy Aluminum Cover (Option) |
| The HEA compact quarter turn electric valve actuator standard aluminum housing uses a thick, heavy casting and a strong frame. This stops the body from bending under high valve torque, keeping the unit completely sealed in tough outdoor weather. We also offer a lighter Economy Housing with thinner walls if you need a lower price. | The HEA compact quarter turn electric valve actuator standard aluminum cover is built thick for deeper screw threads that won’t strip. Its rigid, flat body presses the seal down evenly to keep out water and dust. We also offer a lighter Economy Cover if you need a lower price. | ||
| Position Indicator Cover | Indicator Pointer | Cable Glands | |||
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| Standard Flat Cover | Convex Dome Cover | Plastic Pointer | Zinc Alloy Metal Pointer | Stainless Steel Cable Glands | Nylon Plastic Cable Glands |
| Compact cover with an integrated inspection window. Saves space and protects against impact in tight setups. | Clear dome cover that allows 360° visual checking of the valve position from any direction or high angles. | Made of stainless steel sheet. Resists UV degradation, cracking, and high ambient heat, ensuring long service life for outdoor valve setups. | Made of durable plastic sheet. Lightweight, corrosion-proof, and cost-effective for general indoor use. Custom colors are available upon request. | Stainless steel glands, built for maximum impact resistance and ultimate protection against harsh chemical corrosion. | Lightweight and cost-effective plastic glands, ideal for standard industrial weatherproofing and everyday protection(available in black or white). |
| Drive Shaft & Socket | Manual Override | |||
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| Black-Oxide Alloy Steel | Nickel-Plated Alloy Steel (Option) | Side Lever / Hex Wrench | Handwheel (Option) | New Design Handwheel (Option) |
| Cost-effective standard black-oxide finish for essential corrosion protection. | High-strength alloy steel with nickel plating, providing enhanced corrosion resistance, surface hardness, and wear resistance. | The HEA compact quarter turn electric valve actuator comes standard with a Side Lever / Hex Wrench override for manual positioning during power failure or maintenance. For quick, tool-free operation, it can be fitted with an optional Fold-in Handwheel, or upgraded to a Spoke Handwheel with a revolving handle for higher leverage and easier operation. | ||
HEA Series Compact Quarter Turn Electric Valve Actuator: Electrical Options
Our HEA Series compact quarter turn electric actuator offers different motor options, microswitches, and cable glands. You can easily match the internal parts to how often your valve opens and closes, site conditions, and your budget.
| Drive Motor | Limit Switches | |||
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| Standard Motor | Mid-Grade Motor (Option) | Basic-Grade Motor (Option) | Original Omron® SPDT Microswitches | Economy Microswitches (Option) |
| The price of a valve actuator motor depends on its materials: the thickness of the iron core and how much 100% pure copper wire is inside. Weight is the easiest way to see the quality—a heavier motor has more copper and a thicker core, giving you stronger starting power, less heat, and a longer life without burning out. Our Standard Motor uses the heaviest iron core and pure copper wire to keep your valve working smoothly with fewer aftermarket issues. We also offer lighter Mid-Grade and Basic-Grade options if you need a lower price for simple, low-frequency operations. | Our HEA electric actuators come standard with original Omron® microswitches using premium silver contacts. Silver conducts electricity better, resists rust, and won’t stick or burn from electrical sparks. This cuts off power instantly to protect the motor and gives your valves reliable limit signals over thousands of cycles. We also offer Economy Microswitches with copper contacts if you need a lower price for simple, low-frequency setups. | |||
Looking for Factory-Direct OEM Supply & Custom Branding?
Tailor HEA compact quarter-turn electric valve actuators to your brand specs—adjustable travel angles, custom housing finishes, and factory-installed accessories.
✓ Direct Factory Manufacturing
✓ ISO 5211 Standard Valve Mounting
✓ OEM Labeling & Color Customization
✓ Competitive Bulk Pricing
✓ ISO 5211 Standard Valve Mounting
✓ OEM Labeling & Color Customization
✓ Competitive Bulk Pricing
⚡ 24-hour response for OEM specs & volume quotes
Materials and Component
| NO. | Qty | Part name | NO. | Qty | Part name | NO. | Qty | Part name | NO. | Qty | Part name |
| 1 | 1 | Cross bolt (component) | 16 | 1 | Gear on worm | 31 | 2 | Hexagonal nut | 46 | 1 | gasket |
| 2 | 1 | Dustproof end plug | 17 | 1 | Insulating division board | 32 | 2 | Waterproof cable joint | 47 | 1 | Cross bolt (component) |
| 3 | 6 | Anti-break off hex type socket screw | 18 | 1 | Locknut | 33 | 2 | O-ring | 48 | 1 | Dial |
| 4 | 1 | Oil seal | 19 | 1 | Electromotor rotor | 34 | 2 | gasket | 49 | 1 | Cross bolt |
| 5 | 1 | Electric fitting: front cap | 20 | 1 | Bearing | 35 | 1 | Bearing | 50 | 1 | Connecting terminal |
| 6 | 1 | O-ring | 21 | 1 | Flat key | 36 | 1 | Oil seal | 51 | 2 | Cross bolt |
| 7 | 3 | Cross bolt (component) | 22 | 1 | Worm screw | 37 | 1 | Worm wheel | 52 | 1 | Electric capacitor |
| 8 | 3 | Cross bolt (component) | 23 | 1 | Electromotor stator | 38 | 1 | Electric fitting: inner cap | 53 | 1 | Viewing glass |
| 9 | 1 | Electric fitting: speed-down case body | 24 | 1 | Bearing | 39 | 1 | Bearing | 54 | 1 | O-ring |
| 10 | 3 | Bearing | 25 | 1 | Bearing | 40 | 4 | Cross bolt (component) | 55 | 1 | Electric fitting: top cap |
| 11 | 3 | Electric fitting: reduction gear component | 26 | 1 | Insulating division board | 41 | 1 | Stroke dog | 56 | 4 | Anti-break off hex type socket screw |
| 12 | 3 | Bearing | 27 | 1 | Electric fitting: case body | 42 | 1 | gasket | 57 | 1 | O-ring |
| 13 | 1 | Electric fitting: speed-down case 1 | 28 | 1 | Allen wrench | 43 | 1 | Stroke dog | 58 | 1 | Indication window hood |
| 14 | 1 | Axis shield ring | 29 | 2 | Limit bolt | 44 | 1 | gasket | 59 | 4 | Internal hexangular fillister head screw |
| 15 | 3 | Cross bolt (component) | 30 | 1 | handle holder | 45 | 1 | gasket |
Hearken HEA Series Compact Quarter Turn Electric Valve Actuator Production Process
Hearken HEA compact quarter turn electric valve actuators are manufactured in-house with standard ISO 5211 flanges for direct valve mounting, and pass 100% air-leakage and load-bench torque testing before shipment.
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Step 1: Raw Housing Inspection | Step 2: CNC Machining & Deburring | Step 3: Powder Coating Inspection |
| When raw die-cast aluminum housings arrive, wall thickness and casting structure are checked to rule out pores or cracks, ensuring a solid foundation for the compact electric valve actuator. | CNC milling, drilling, and thread tapping are done in-house for HEA housings, end covers, ISO 5211 bases, and cable entries. Sharp edges are ground down and metal chips are blown off to protect internal gears. | Cleaned housings get a heavy epoxy powder coating. Coating thickness and paint bonding are checked to give the compact electric actuator a rust-proof finish for indoor and outdoor setups. |
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Step 4: Post-Coating Thread Re-Tapping | Step 5: Direct ISO 5211 Valve Mounting and Drive Sleeve Options | Step 6: Air Tightness & Pressure Decay Testing |
| After powder coating, HEA compact quarter turn electric valve actuator all threaded holes on the base and cable entries are tapped again. This cleans out leftover powder so bolts and cable connectors screw in smoothly without getting stuck. | HEA compact quarter turn electric valve actuators feature standard ISO 5211 mounting flanges (such as F03 and F05) with a double square drive socket for direct valve alignment. We also supply custom reducing sleeves or adapters to fit your specific valve stems. | Hearken compect quarter turn electric valve actuator not only can pass submersion water sealing test, but also can pass the air tightness pressure decay test As far as we all know air tightness pressure decay test is more authoritative for formal acceptance with measurable leakage values, while the submersion test serves merely as a visual method to find leakage positions. |
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Step 7: Torque & 90° Stroke Calibration | Step 8: Factory Test Report Generation | Step 9: Custom Foam & Export Packaging |
| We mount each quarter turn electric actuator on the test bench to run 90° load tests. We set the limit switches for exact open and close points, adjust the mechanical stops, and check the torque cut-off. | A unique serial number is printed on the Factory Test Report for every HEA compect quarter turn valve actuator. Test records include torque ratings, 90° stroke settings, and voltage data for full batch tracking. | HEA compact quarter turn electric valve actuators are placed in custom foam inside individual boxes, then packed into strong wooden cases. All shipping papers and test reports are prepared for safe sea and air transit. |
Need Factory-Tested Quarter Turn Electric Valve Actuator for Your Next Batch?
Every compact quarter turn electric valve actuator comes with 100% torque calibration and pressure-decay test reports before dispatch.
HEA Compact Quarter Turn Electric Valve Actuator Smart Digital Setup & Fault Diagnostics
The parameter menu settings and error code diagnostics below apply to all HEA Electric Actuators equipped with a digital display screen and onboard or remote control buttons (A/M, UP, DOWN).
LED Digital Fault Diagnostics (Error Codes Er0 – Er15)
If an operational issue occurs during system commissioning or daily operation, the digital display will show a specific error code. Refer to the matrix below for quick root-cause identification and resolution.
| Err code | description | resolution |
| Er0 | actuator phase-lack | Check if 380VAC three-phase control phase-lack |
| Er1 | Parameter store error | Product not calibrate, recalibrate |
| Er2 | Internal temperature too high alarm | Internal temperature of the device too high, take action to cool |
| Er3 | Forward action motor blocked | Check the mechanical part of the valve and actuator |
| Er4 | Reverse action motor blocked | Check the mechanical part of the valve and actuator |
| Er6 | Input current not enough | <“iL” value, need increase the signal to 4mA |
| Er7 | Input current too much | >”iH” value, decrease to 20mA |
| Er8 | Threshold smaller than low limit | Check “cL” value until 0.00% |
| Er9 | Threshold more than upper limit | Check “cL” value until 100.00% |
| Er10 | Zero full stroke too small | Running schedule difference is too small, zero recalibration valve full again |
| Er11 | External temperature detecting head over temperature | Take action to cooling |
| Er12 | Potentiometer not connect or overrun | Check wiring or adjust potentiometer |
| Er13 | open a moment | With a direction of torque, check the mechanical parts of the valve or actuator |
| Er14 | clearance of torque | Zero direction of torque, check the mechanical parts of the valve or actuator |
| Er15 | three-phase motor wire inversely connect | Adjust motor wire phase sequence |
Parameter Setup & 4-20mA Signal Calibration Menu
Easily configure operating modes, action limits, and calibrate 4-20mA control signals using the A/M, UP, and DOWN buttons. Follow the parameter guide below to adjust settings or perform full-stroke automatic calibration.
| No | Name | Parameter | Default Value | Description |
| 1 | Enter setting menu | Enter parameter setting menu, need to press A/M key over 3 second, then enter Eb parameter | ||
| 2 | Electrical brake | Eb | Eb=1 | Eb=1 allow, press UP or DOWN to select, press A/M to confirm, continue to set parameter Ac. Eb=0 forbid, press UP or DOWN to select, press A/M to confirm, continue to set parameter Ac. |
| 3 | Working Mode | Ac | Ac=0 | Ac=0 forward action: input current change from 4mA to 20mA, mapping the valve open wider, press UP or DOWN key to select, press A/M to confirm, continue to parameter I settings, Forward “Led light up” Ac=1 reverse action: input current change from 4mA to 20mA, mapping the valve open wider, press UP or DOWN key to select, press A/M to confirm, continue to parameter I settings, Reverse “Led light up” |
| 4 | interrupt signal mode | I | I=2 | I=2 no action (keep the valve open level), press UP or DOWN to select, press A/M key to confirm, continue to parameter cL setting, “Keep” Led light up. I=3 close action (till the valve full close), press UP or DOWN to select, press A/M key to confirm, continue to parameter cL setting, “Close” Led light up. |
| 5 | Valve close low limit | cL | cL=0 | Restrict the minimum low limit of close valve(in percentage), press UP or DOWN to select, press A/M to confirm, enter parameter cH |
| 6 | Valve close low limit | cH | cH=100 | Restrict the maximum low limit of close valve(in percentage), press UP or DOWN to select, press A/M to confirm, enter parameter cH. |
| 7 | Locate accuracy | d | d=0.4 | d=0.1~3.0 press UP or DOWN to modify the value(in percentage), continue to parameter P |
| 8 | Locate accuracy | P=5.0 | Press A/M key to confirm, save setting parameter, exit the setting state, return to the control state | |
| 9 | Exit without saving | P=4.9 | Press A/M key to confirm, not save setting parameter, exit the setting state, return to the control state | |
| 10 | Restore to factory settings | P=20.1 | Press A/M key to confirm, restore to factory default settings and automatically calibrate the valve position. | |
| 11 | Calibrate input current | P=11.1 | iL=XXX iL=XXX | Press UP or DOWN key to set P to 1.1, press A/M to confirm, continue to parameter iL.(Note: calibrate the min input current first, then calibrate the max input current) Calibrate min input current iL, adjust external input current to 4mA, after the display on the LED stable, press A/M key to confirm, continue to parameter iH. Calibrate the max input current iH, adjust external input current to 20mA, after the display on the LED stable, press A/M key to confirm, continue to parameter P=5.0. |
Technical Specifications
| Standard Specifications | |||
| Item | Specification | Item | Specification |
| Function | On/Off or Modulating control | Seals | NBR |
| Output Torque | 30 Nm to 1000 Nm (up to 2000 Nm on request) | Position Indicator | Dome type with polycarbonate window |
| Travel Angle | 90° ± 5° (Extension up to 270° on request) | Limit Switches | 4 x SPDT (2 for Open/Close, 2 dry contacts for feedback), 250VAC 10A |
| Power Supply | 24VDC, 110VAC, 220VAC (1-Phase ±10%, 50/60 Hz) | Manual Override | Hex spanner (Mechanical handle) |
| Motor | Squirrel-cage asynchronous motor | Conduit Entries | 2 x 1/2″ PF (Options: M20×1.5, 1/2″ NPT) |
| Enclosure Rating | IP67, NEMA 4 & 6 | Mounting Flange | ISO 5211 standard |
| Housing Material | Anodized aluminum alloy with epoxy polyester powder coating | Ambient Temperature | Standard: -20°C to +70°C (Low-temp down to -60°C, High-temp up to +150°C) |
| Gears / Drive | Steel & aluminum bronze worm gear (Self-locking) | Ambient Humidity | Max. 90% RH (non-condensing) |
| Output Shaft / Adaptor | Alloy steel | Vibration Resistance | XYZ 10g, 0.2–34 Hz, 30 min |
| Fasteners | Stainless steel screws | Lubrication | Aluminum-based grease (EP type) |
| Options Available | |||||
| Space Heater | 5W to 10W anti-condensation heater (24VDC / 110VAC / 220VAC) | Modulating Control | Proportional control unit (Input/Output: 4–20 mA, 1–5 VDC, 2–10 VDC) | Visual Indication | Internal LED light for indicator dome |
| Motor Protection | Electronic thermal overload stall protection (Trip @ 120°C / Reset @ 97°C ± 5°C) | Local Control Station | Local / Remote selector switch + Open / Stop / Close push buttons or knobs | Manual Device | Declutchable manual handwheel override |
| Position Feedback | Feedback potentiometer (1 kΩ to 10 kΩ) or 4–20 mA current transmitter | Fail-Safe Mechanism | Power failure self-reset module | ||
Technical Parameter and Specifications (On/Off or Modulating Version)
| Model | Max Output Torque (N.m) | Operating Time 90°(Sec.) | Drive Shaft(mm) | Motor (W) | Single-phsae rated current(A) 220VAC/24VDC | Weight (kg) | Flange Size | |||
| Square | Deep | Round | Deep | |||||||
| HEA003 (On/Off Only) | 30N.m | 10/10 | 9X9 | 13.5 | Ø12.6 | 26 | 8 | 0.15// | 2.5 | F03/F05 |
| 11X11 | 15.5 | |||||||||
| HEA005 | 50N.m | 30/15 | 11X11 | 15.5 | Ø12.6 | 26 | 10 | 0.25/2.2 | 4.1 | F05/F07 |
| 14X14 | 18 | |||||||||
| HEA008 | 80N.m | 30/15 | 11X11 | 15.5 | Ø15.78 | 26 | 10 | 0.25/2.2 | 4.1 | F05/F07 |
| 14X14 | 18 | |||||||||
| HEA010 | 100N.m | 30/15 | 14X14 | 18 | Ø15.78 | 28 | 15 | 0.35/3.5 | 5.1 | F05/F07 |
| 17X17 | 22.5 | Ø 18.95 | ||||||||
| HEA015 | 150N.m | 30/15 | 14X14 | 18 | Ø18.95 | 28 | 15 | 0.37/3.5 | 5.1 | F05/F07 |
| 17X17 | 22.5 | |||||||||
| HEA020 | 200N.m | 30/15 | 22X22 | 26 | Ø22.13 | 45 | 45 | 0.3/7.2 | 9.4 | F07/F10 |
| HEA040 | 400N.m | 30/15 | 22X22 | 26 | Ø28.48 | 45 | 60 | 0.33/7.2 | 9.4 | F07/F10 |
| HEA060 | 600N.m | 30/15 | 27X27 | 32.5 | Ø31.65 | 45 | 90 | 0.33/7.2 | 9.8 | F07/F10 |
| HEA080 | 800N.m | 40/20 | 27X27 | 32.5 | Ø31.65 | 45 | 180 | 0.47/11 | 15 | F10/F12 |
| HEA100 | 1000N.m | 40/20 | 27X27 | 32.5 | Ø31.65 | 45 | 180 | 0.47/11 | 15 | F10/F12 |
| HEA200 | 2000N.m | 45/22 | 27X27 | 32.5 | Ø31.65 | 45 | 180 | 1.5/15 | 15.3 | F10/F12 |
Need Technical Selection Help or Custom Options?
Not sure which model fits your valve torque, or need 4-20mA modulating options? Our engineers are here to assist.
Dimension
HEA003 Dimensionin mm
HEA005/HEA008 Dimensionin mm
HEA010/HEA015 Dimensionin mm
HEA020/HEA040/HEA060 Dimensionin mm
HEA080/HEA100/HEA200 Dimensionin mm
Want the Complete HEA Compact Quarter Turn Electric Valve Actuator Technical Data Sheet?
Get full dimensional specs, wiring diagrams, and optional accessories in one downloadable PDF file.
HEA Electric Actuator Purchase Guide
- Required Selection Details
Please specify the following key parameters so our engineers can correctly size and configure the actuator model for your valve.
| Parameter | What to Provide | Purpose |
| Valve Torque | Valve break torque with a 1.25–1.5 safety factor (in N·m) | Matches the correct actuator model size (30–2,000 N·m). |
| Power Supply | Exact site voltage and frequency (e.g., 220V AC, 380V AC, 24V DC, 110V AC) | Configures the factory-built motor winding. |
| Control Mode | On/Off or Modulating (Standard: 4–20 mA) | Determines internal control board and terminal wiring. |
| Mounting Size | ISO 5211 flange size (e.g., F05, F07) & stem drive square/bore size | Ensures direct mounting to the valve. |
2. Optional Features & Add-ons
All HEA actuators come standard with 90° rotation, IP67 weatherproof housing, and a side hex wrench. If your operating conditions require customized configurations, please choose from the options below.
Control Signals: 0–10V DC, 1–5V DC, or Modbus RS485 (Standard is 4–20 mA).
Manual Override:
Standard: Side hex wrench.
Option A: Fold-in handwheel for tool-free manual operation.
Option B: Spoke handwheel with revolving handle for easier turning.
Space Heater: Anti-condensation heater for high-humidity areas or temperatures below -10°C.
Working Angle: 180°, 270°, or 3-position stopping options (Standard is 90° quarter-turn).
FAQ About HEA Series Compect Quarter Turn Electric Valve Actuator
Q1: Is the compact quarter turn electric valve actuator torque sufficient for my valve?
Please share your valve type, size, and working pressure. Our HEA Series quarter turn electric actuator covers a wide torque range from 30 N·m up to 2000 N·m for 0~270° quarter-turn operation. We will calculate and recommend the exact model for your application.
Q2: Should I choose the on/off type or modulating type?
If your valve only needs to open and close fully, go with the on/off type. If you need to control flow rate precisely, choose the modulating type, which regulates valve positions using 4–20mA or 0–10VDC control signals.
For modulating control, we offer three hardware configurations:
- Modulating Type (No Screen): An external control box mounted on the actuator for direct PLC signal control, without a display screen or local buttons.
- Modulating Type (With Screen): An external control box equipped with an LCD display and buttons for easy on-site calibration and position reading.
- Integral Type: Features an integrated display screen and selector switches, allowing you to easily switch between local on/off operation and remote modulating control right on site.
Q3: What power supply voltages are available?
The HEA Series compact quarter turn electric valve actuator is available in 380V AC, 220V AC, 110V AC, and 24V DC. We will send you the right standard model for your local voltage.
Q4: Can it work reliably outdoors, in humid areas, or at high temperatures?
Yes. The HEA series compact quarter turn electric valve actuator features an IP67 weatherproof housing for outdoor installations and built-in motor thermal overload protection for high ambient temperatures. For high-humidity or cold environments, an optional space heater can be added to prevent internal condensation.
Q5: Can you provide the mounting dimensions and wiring diagrams?
Absolutely. We provide detailed dimensions and clear wiring diagrams for all models. We will also verify the mounting compatibility based on your valve’s flange standard and stem size before order confirmation.
Q6: Is position feedback available for remote monitoring?
Yes, position feedback is available. We can equip the actuator with a position feedback potentiometer or sensor, outputting standard signals to your control room for real-time monitoring.
Q7: Is there any protection mechanism during a sudden power failure?
Normally, the actuator stays in its current position when power is lost.
If you need the valve to move when power fails, we offer an optional power-off auto reset. It will automatically drive the valve fully open or fully closed as soon as the power cuts off.
Q8: Can I mount the HEA quarter turn electric actuator directly to the valve?
Yes, as long as the valve has an ISO 5211 flange and a matching stem. For non-standard valves or high-temperature lines, we provide a bracket and coupler to fit the connection and protect the actuator from pipeline heat.
Q9: Can you provide a complete automated valve solution?
Yes, Hearken Flow provides complete valve automation packages. We mount the actuator to the ball or butterfly valves you need, calibrate the travel, and test the whole electric valve before shipping.
HEA Series Compect Quarter Turn Electric Valve Actuator Technical Troubleshooting & Maintenance
Q1: What happens if high AC power is wrongly connected to a 24VDC HEA compact electric valve actuator?
Connecting high AC voltage (like 110V or 220VAC) directly to a 24VDC compact electric valve actuator will instantly burn out both the electric motor and the main circuit board. Since the motor windings are burned out under extreme over-voltage, you must replace the entire unit. Always double-check your power supply voltage and DC positive/negative wires before turning on the power.
Q2: Why is my HEA quarter turn electric valve actuator running much slower than normal (e.g., over 40 seconds instead of 30 seconds)?
A sudden drop in speed on a quarter turn electric valve actuator is usually caused by a wiring error on a 3-wire system. Sending power to both the open and close wires at the same time burns out one set of the motor coils. This causes a big loss in power and makes the actuator run very slow. Check your wiring setup immediately. If the motor coils are already burned, you need to replace the motor or the complete unit.
Q3: How do I connect the 220VAC feedback terminals (7, 8, and 9) on a HEA quarter turn valve actuator?
On a standard quarter turn valve actuator, Terminals 7, 8, and 9 are simple dry-contact switches (no live power output) used to show valve position:
- Terminal 7: Common wire input.
- Terminal 8: Open position signal (switches on when fully open).
- Terminal 9: Close position signal (switches on when fully closed).
Wiring tip: Run your PLC or indicator light signal through Terminal 7 as a simple loop. Never feed live power directly into these dry contact terminals.
Q4: What causes the internal PCB board to fail on a HEA compact electric actuator?
Circuit board failures on a compact electric actuator usually happen because of two common job-site problems:
- Unstable Power or Wiring Issues: Power surges, missing phases on 380V setups, loose neutral wires, or voltage spikes will burn the electrical parts on the board.
- Valve Jamming / Motor Stall: If the valve stem gets stuck, the motor stops turning (stalls). This draws a huge amount of current and burns out the drive parts on the board.
Q5: Why is my HEA compact quarter turn electric valve actuator motor getting very hot during operation?
Overheating in a compact quarter turn electric valve actuator is usually caused by three main issues:
- Limit Switch Misalignment: If the internal switches are not set right to cut power at the end of the turn, the motor will keep pushing against the mechanical stop, stall, and heat up quickly.
- Stuck Valve: A stiff or jammed valve stem forces the actuator to work harder than normal.
- Voltage Too Low or Unstable: Running the actuator far outside the normal voltage range (+/-10%) can also cause the motor to overheat.
Q6: What causes clicking noises or gear jumping in a HEA quarter turn electric actuator?
Gear noise or jerky movement in a quarter turn electric actuator usually means there is dirt or debris inside the gear mechanism. Open the cover and check the spur gears and worm gears for metal dust, small particles, or dried-up grease. Cleaning out the gears and adding fresh grease will make it run smoothly again.
Q7: Why does my fail-safe HEA quarter turn electric valve actuator open fine, but won’t auto-close during a power outage?
On a battery-backup quarter turn electric valve actuator, this almost always means the internal battery is empty. Keep the main power connected for a few hours so the battery can fully charge before you test the power-loss auto-close feature. Do not disconnect or remove the internal battery pack.
Q8: Should I install an anti-condensation heater if water forms inside the HEA compact electric valve actuator in wet or damp places?
Yes. In hot and wet areas or outdoor locations with big day-to-night temperature changes, moist air inside a compact electric valve actuator can turn into water drops. Installing our optional internal heater keeps the inside dry and protects the circuit board from water damage.
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