Multi-Turn Electric Actuator for Gate & Globe Valves

Hearken HEA(M) Series Compact Multi-Turn Actuator Production Process

How our team builds compact, high-torque multi-turn drivers for gate, globe, knife gate, and diaphragm valves (supporting both rising and non-rising stems)..

Step 1: Raw Shell Quality Inspection	Step 2: CNC Machining and Dedicated Thread Tapping	Step 3: Machine Grinding and Compressed Air Blow-Off
When raw die-cast aluminum enclosures arrive from our casting partners, our QC team inspects wall thickness and structural strength to ensure each HEA(M) housing delivers a rugged IP67 rating in a compact footprint.	Our team handles CNC milling and drilling in-house, followed by precision thread tapping on dedicated tapping machines. We machine the housings, end covers, drive nuts, M10/M12 mounting holes, and NPT/M20 conduit entries to match your specific valve stem and bracket specs.	After all machining and tapping are complete, our team uses grinding machines to debur every edge and compressed air to blow off all metal chips and dust from the aluminum housings. Clearing every shaving ensures Hearken’s compact gear set operates smoothly without mechanical friction.

Step 4: Surface Finish Inspection After Powder Coating	Step 5: Standard 3-Jaw Drive and Custom Sleeve Machining	Step 6: Interior Assembly by Hearken Flow  Team
We send cleaned housings for heavy-duty epoxy powder coating. When they return, our inspectors check coating thickness and surface adhesion to guarantee a durable, corrosion-resistant protective shell for both indoor plant lines and outdoor installations.	Our standard HEA(M) actuators feature a rugged 3-jaw drive interface at the base for direct coupling. Based on your order requirements, our team machines custom drive sleeves, keyways, or threaded adaptors to fit your specific gate, globe, or knife gate valve stems (supporting both rising and non-rising stems).	Our assembly team installs the precision gear reduction set, motor, micro limit switches, and 4-20mA proportional control card inside the HEA(M) compact interior chamber.

Step 7: 100% Torque and Stroke Calibration	Step 8:Factory Test Report Generation	Step 9: Individual Foam-Carton and Export Wooden Case Packaging
We mount every HEA(M) unit onto our testing bench for full multi-turn cycle tests. Our engineers measure rotation turns, calibrate limit switches to your valve travel, and verify exact torque cut-off from 50 Nm to 300 Nm under load.	We issue an official Factory Test Report for every Hearken batch. Our team records torque ratings, stroke settings, and voltage specs under a unique serial number for complete quality traceability.	Our team packs each HEA(M) actuator with custom protective foam inside an individual inner carton. These cartons, along with your custom drive sleeves or adaptors, are then secured into heavy-duty export wooden cases to guarantee safe ocean and air transit, with all shipping docs sent straight to your email.

HEA(M) Series Field Diagnostics & Troubleshooting

Designed for fast on-site commissioning and maintenance. Use this guide to quickly diagnose and resolve operational issues during your installation.

1. Universal Troubleshooting Matrix (For All HEA(M) Models)

• Symptom: Motor Does Not Run

  • Probable Cause: Power supply disconnected, circuit breaker tripped, or terminal wiring loose.

  • What You Should Do: Check your main incoming voltage, inspect your circuit breaker, and verify that all terminal connections are tight.

• Symptom: Motor Runs, but Valve Stem Does Not Move

  • Probable Cause: Manual override lever engaged, or drive sleeve keyway disengaged.

  • What You Should Do: Ensure you have returned the manual declutch lever to the “AUTO” position, and inspect your drive sleeve keyway coupling.

• Symptom: Reverse Rotation Relative to Control Command

  • Probable Cause: Incoming power phase sequence reversed (for 3-phase AC) or control polarity reversed.

  • What You Should Do: Swap any two incoming AC phase wires, or adjust the signal polarity on your control terminals.

2. LCD Fault Code Diagnostics (If Your Model Has Digital Display)

When an error occurs, your HEA(M) digital screen alternates the exact error code. Use this matrix for instant on-site troubleshooting:

• Er0 (Power Phase Loss): Check your 380VAC 3-phase power supply to ensure solid contact on all phases.

• Er2 (Over-Temperature Alarm): Internal or ambient temperature is too high. Allow your unit to cool down or take cooling measures.

• Er3 / Er4 (Opening / Closing Stall): Motor is running but valve position remains unchanged. Inspect your valve body or mechanical coupling for jamming.

• Er6 / Er7 (Control Signal Loss / Over-Current): Your 4-20mA input signal is missing, weak, or exceeds 150% of iH. Check your signal input wiring or recalibrate input current values.

• EL (Switch Wiring Reversed): Open/close limit or torque switch wiring is reversed. Swap your open and close over-torque wires at the terminal block.

• Er9 (Signal Out of Range): Given control signal exceeds electronic limit values. Check your “cL” and “cH” electronic limit settings or recalibrate input current.

• Er10 (Stroke Range Too Small): Zero-to-full stroke difference is too small. Recalibrate your valve zero (close) and full (open) position span.

• Er12 (Sensor / Encoder Fault): Potentiometer or encoder signal fault. Inspect wiring connections, check gear engagement, or adjust the potentiometer effective range.

• Er13 / Er14 (Opening / Closing Over-Torque): Actuator tripped the open or close over-torque switches. Inspect your valve seat for foreign debris or tight packing.

• Er15 (Rotation Direction Error): Actuator rotated in the wrong direction. Adjust your motor wire phase sequence.

Need Wiring Schematics for Your Specific Model?

Download the complete Hearken Flow HEA(M) O&M Instruction Manual (PDF) to access full wiring diagrams and menu parameter setup guides for your project.