Multi-Turn Electric Valve Actuator for Gate, Globe & Diaphragm Valves

Q: Do you offer multi-turn electric actuators with an IP68 rating that support Bluetooth or Wi-Fi connectivity?

Yes, we do. Our HMT and HMT(R) series models meet the IP68 standard and support both Bluetooth and Wi-Fi connectivity.

Multi-turn electric actuators from 35 to 3,000 N·m for gate, globe & diaphragm valves. SIL3,ATEX Ex II 2 G/D, IP65,IP67,IP68. Profibus / Modbus / HART. ISO 5210 direct mount.

HMT Model Intelligent Modulating Multi Turn Electric Actuators Side View

Black Intelligent Modulating Multi Turn Electric Actuators

HMT Model Intelligent Modulating Multi Turn Electric Actuators Bottom Interface

IP68 Multi-Turn Linear Electric Actuator For Gate Valve supplier

IP68 Multi-Turn Linear Electric Actuator For Gate Valve China

IP68 Multi-Turn Linear Electric Actuator For Gate Valve price

HMT Series Multi Turn Electric Actuators

On/Off or proportional control
Torque Rotational Moment: 50Nm~2500Nm
Weatherproof and submersible applications
Non explosion proof and Explosion proof
Motor Power: 380V/3Phase, 220V/50hz Single phase
Environment Temperature: -30°C ~ +70°C (optional -40°C ~ +100°C)
Flange connection: DIN and ISO standards
ISO 9001 / SIL / CE / IP65, 67, 68 / RoHS

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multi-turn Electric Actuators

Standard across the entire Hearken multi-turn electric actuator series, our dual-protection system gives you active mechanical and electrical safety under extreme conditions. The instant over-torque cut-off automatically shuts down motor power if a valve jams or meets high resistance—protecting the valve stem, drive nut, and gears from mechanical damage. At the same time, built-in sensors track core heat and trigger 120°C thermal protection to stop the motor, avoiding insulation breakdown and coil burnout during heavy-duty use.

HEA(M) Compact Multi Turn Electric Actuator

Torque Range: 50 – 300 N·m
Output Speed: 5 r/min
Protection Class: IP67
Power Supply: AC/DC 24V, 110V, 220V, 380V
Flange Standard: ISO F10/F12
Environment Temperature: -28°C~+60°C (Other temperatures can be customized)

HMT Multi Turn Electric Valve Actuator

Torque Range: 50 – 2,500 N·m
Protection Class: IP65 / IP67 / IP68 (selectable)
Explosion-Proof: ATEX Ex II 2 G/D; ExdII BT4/CT4 (GB3836)
Power Supply: AC380V/220V/110V standard; AC660V/440V/415V special; DC12/24/48V
Environment Temperature: -30°C~+70°C ( Other temperatures can be customized)

Intelligent Type Multi-Turn Electric Actuator Manufacturer and Supplier

HMT(R) Multi-Turn Intelligent Electric Valve Actuator

Torque Range: 35 – 3,000 N·m
Protection Class: IP68; ATEX Ex II 2 G/D explosion-proof
Communication: Profibus, Modbus, HART, FF (native fieldbus support)
Output Speed: 18/24 RPM standard (36 / 48 / 72 / 96 / 144 / 192 RPM customizable)
Non-intrusive Design

Why Choose Hearken?

High-volume inventory of semi-finished standard pneumatic actuators stacked on pallets in a clean, organized factory warehouse

Modern and clean assembly and testing line for actuators with integrated workstations and overhead lighting inside our production facility

Large-volume stock of actuator gears and internal components organized in blue storage cages within our manufacturing facility

Company Profile

We manufacture standard electric and pneumatic actuators in volume for valve OEMs and wholesale distributors. We offer flexible OEM options for batch orders. We can customize housing colors, logos, and nameplates for your brand.
We also supply ready-to-install actuated valves. We work with experienced valve factories to handle mounting, alignment, and testing before shipment.

Founded	2010 (16 years of manufacturing expertise)
Business & Products	Manufacturer of electric and pneumatic actuators for industrial valve automation. Electric: multi‑turn, part‑turn, and linear Pneumatic: rack & pinion, scotch‑yoke, and linear
Production capacity	Electric actuators: 10,000 units/month Pneumatic actuators: 50,000 units/month
OEM/Label	Custom housing colors, logos, nameplates, and junction box layouts available for batch orders
Certifications	ISO 9001, SIL 3, ATEX, CE, EAC, IP65/IP67/IP68, RoHS
Standard Lead Time	15 – 25 days after order confirmation
Warranty	18 months from first start-up
Export Markets	125+ countries — Europe, Americas, Southeast Asia, Middle East

Every Hearken multi-turn electric actuator is strictly tested before packing. We check raw materials, machining, wiring, assembly, and test 100% of finished units for electrical performance and torque.

Third-party inspection like SGS or BV is welcome. Certificates like ISO 9001, CE, EAC, RoHS, IP ratings, and ATEX/SIL 3 are available upon request.

Every unit has a laser-engraved serial number for easy tracking of test records and production batches. All products come with an 18-month warranty.

Export packing of long aluminum pipes on a truck

Stage 01 / 08

Incoming Material Inspection

Quality Control — 8 Stages

We require Material Test Reports (MTR) for all main raw materials, including aluminum housings, steel shafts, bronze gears, and other key parts. We test every batch with a spectrometer to check metal elements before machining. We also inspect raw parts for cracks, air holes, and size accuracy so only good components enter production.

We use high-pressure die-casting to make dense, solid aluminum housings with no air holes. Key parts like bearing seats and mounting flanges are precision CNC-machined. We also check shaft bore alignment so the gears run smoothly without noise or power loss under heavy load.

After powder coating, we re-tap all threaded holes on mounting flanges, conduit entries, and cover joints. This removes leftover paint powder so bolts go in smoothly and O-rings are not damaged, ensuring a tight seal during installation.

After housing assembly, we fill the unit with 0.2 bar compressed air and put it into a water tank. We check all joints and cable entries for air bubbles to guarantee a full dust- and water-proof seal.

We run 100% electrical safety testing on all multi-turn actuators. We test insulation resistance and high-voltage withstand to eliminate short circuits, and measure motor phase balance to prevent overheating and power loss under heavy load.

After electrical testing, every actuator gets full functional checks before packing. We check torque output, stroke position, limit switches, signals, and manual handwheel. This ensures every unit works perfectly with zero defects.

Each actuator is laser-engraved with a unique serial number that links to its test data and build history. We provide a detailed inspection report with every order and keep all records in our archive for long-term support.

Each actuator is wrapped in EPE foam, packed in a heavy-duty carton, and loaded into an export wooden crate for safe sea transport. We also place desiccant inside to prevent moisture during transit.

Black HMT Series Multi-Turn Electric Actuators

Intelligent Multi-Turn Electric Actuators Before Packaging

Multi-Turn Electric Actuator and Gate Valve Assembly

Multi-Turn Electric Actuators — Repeat Customer Order

Multi-Turn Electric Actuators Quality Inspection

Multi-Turn Electric Actuators Ready for Shipment

batch assembly line of compact electric valve actuators

electric actuators inspection on assembly bench

ISO 9001

SIL3 OF ELECTRIC ACTUATORS

ATEX Electric Actuator-Hearken Flow Equipment

IP67 Electric Actuators-Hearken Flow Equipment

Rohs Electric Actuators

EAC Electric Actuator

We know volume ordering means significant capital and tight deadlines on your side. That’s why we streamline your sourcing—offering transparent payment terms, a fast 15–25 day turnaround, and the OEM flexibility to build the actuator around your specs, not the other way around.

Item	Details
Order Volume	Built for bulk orders
Lead Time	15–25 days from order confirmation; every unit shipped fully assembled and factory-tested
Private Label	Custom branding and nameplate options available on request
Voltage Customization	Standard AC380V/220V/110V; special voltages AC660V/440V/415V and DC12/24/48V available
Warranty	18 months from startup
Samples	Available for qualification before you commit to a bulk order
Payment Methods	T/T (bank wire transfer), L/C (Letter of Credit), Alipay International

Advantage of Hearken Multi-turn Electric Actuators

Maintenance-Free Drive & Double-Sealed Housing

Designed with a factory-sealed, lifetime-lubricated gear box and a separate terminal box, Hearken multi-turn electric actuators cut out the need for routine greasing. This design keeps moisture and dust out of the main electronics during site wiring and inspections.

Leak-Free Manual Override Mechanism

Designed with a new double-seal system at the handwheel shaft, Hearken multi-turn electric actuators stop the annoying oil leaks common in standard manual overrides. This keeps the unit clean and gives you smooth, effortless manual control during power outages or setup—without risking any damage to your valves.

Standard ISO & JB Flange Mounting for Quick Valve Assembly

Built to fit standard valve stems without hassle, Hearken multi-turn electric actuators feature ISO 5210 / JB flanges and custom drive sleeves. They drop directly onto your valves with precise alignment, while built-in torque sensing protects against stem damage and cuts your assembly labor.

Integrated Over-Torque & Stem Protection

Hearken multi-turn electric actuators use bi-directional torque switches and electronic sensors to track drive load in real time. If a valve jams or overloads, power cuts immediately—capping torque at up to 3,000 Nm to keep valve stems from shearing and avoid motor burnouts under high pressure.

Native Fieldbus & Industrial Network Integration

Hearken multi-turn electric actuators natively support Profibus, Modbus, HART, FOUNDATION Fieldbus, and DeviceNet right on the mainboard. With no external gateways needed, they deliver seamless, two-way communication for real-time status monitoring, remote configuration, and advanced diagnostic data straight to your DCS/PLC system.

Extreme Thermal Adaptability (-40°C to +100°C Options)

Standard Hearken multi-turn actuators are rated for ambient lows of -30°C and highs up to +70°C. For severe sites, optional factory thermal builds extend operation down to -40°C and up to +100°C. Internal drive gearing and control electronics maintain stable torque output and signaling in extreme freezing or high-heat processing yards.

Configurable Ingress Protection (IP65 / IP67 / IP68)

To precisely match diverse site conditions and budget requirements, Hearken multi-turn electric actuators feature configurable enclosure protection ratings, ranging from IP65 for standard dust-tight and rain-exposed outdoor setups, to IP67 for heavy washdown environments, up to heavy-duty IP68 for continuous submersion in flooded pits and underground valve vaults.

Standardized Drive Sleeve Options (ISO 5210)

Hearken multi-turn electric actuators offer versatile drive configurations with ISO 5210 standards.
Type A thrust stem nuts handle heavy axial loads for gate and globe valves. Meanwhile, Type B/C torque sleeves perfectly fit non-rising stem valves and secondary gearboxes perfectly. This precise mechanical pairing eliminates installation risks, adapts to any valve stem design, and reduces stock costs by matching multiple valves with a single actuator model.

Multi-Turn Electric Actuator Batch Production

Multi-turn electric actuator with worm gearbox

Gearbox Adaptability & Torque Multiplication

Hearken multi-turn electric valve actuators feature a standardized modular design with ISO 5210 output flanges for direct mounting onto secondary industrial gearboxes without custom machining. You can pair a base multi-turn actuator with a 90° worm gearbox for large-bore ball and butterfly valves when extreme breakaway torque makes direct-drive quarter-turn units too bulky. Or, you can attach a secondary multi-turn gearbox to multiply output torque on heavy-duty gate and globe lines. This modularity allows you to fulfill quarter-turn and heavy-duty multi-turn valve orders from a single base actuator stock, reducing warehouse SKUs and lowering overall inventory costs.

High-Torque Multi-turn Electric Actuators

High-Torque Drive Up to 3,000 Nm & Gearbox Expansion

Hearken Flow multi-turn electric actuators reach a maximum rated output torque of 3,000 Nm with the HMT3000R model, directly powering heavy-duty gate and globe valves up to DN300. Built with oil-bath worm gearing and angular contact bearings for high axial loads, they seamlessly connect via standard ISO flanges to worm, bevel, or spur gear operators — multiplying output torque to automate much larger valve sizes.

Absolute Encoder with Power-Loss Memory

Hearken Flow HMT(R) series intelligent multi-turn electric actuators integrate absolute encoder technology driven by heavy-duty worm and planetary gearsets. Engineable for long-stroke gate and globe valves, the built-in magnetic absolute encoder retains precise valve position coordinates during sudden power outages—even if operated manually via handwheel—ensuring an instant restart without manual re-zeroing.

Power Generation & Steam Systems

Models: HEA(M), HMT & HMT(R) Series

Built for continuous-duty cycle modulation under ambient heat, Hearken Flow multi-turn actuators deliver high-torque seating for steam isolation valves, boiler feed lines, and turbine bypass systems. Integrated over-torque cut-off protects valve stems and drive nuts from mechanical shear during high-pressure seating, while Class H insulated motors and 120°C thermal protection ensure non-drift positioning without thermal shutdown.

Water, Wastewater & Flood Control

Models: HEA(M), HMT & HMT(R) Series (IP66/IP67 Standard / Optional IP68 Submersible)

Featuring ISO 5211 standard mounting for fast, direct assembly onto valves and penstocks, Hearken Flow multi-turn actuators deliver long-stroke thrust control for sluice gates, raw water intakes, and effluent lines. Standard IP66/IP67 sealing covers outdoor weatherproofing, while the optional modular IP68 upgrade allows stocking wholesalers to serve submersible applications without holding separate, high-cost inventory.

HVAC & Commercial Building Water Automation

Models: HEA(M), HMT & HMT(R) Series

Hearken Flow multi-turn electric actuators automate large multi-turn gate and globe valves across central chiller headers, cooling towers, and primary water loops. Integrating native Modbus, Profibus, and HART protocols, the smart HMT(R) Series connects directly to Building Management Systems (BMS) for remote monitoring, diagnostics, and fieldbus control without extra converters. For standard utility loops and budget-sensitive isolation lines, the HEA(M) and HMT Series deliver high-torque mechanical actuation and reliable limit-switch control across commercial HVAC piping networks.

Oil, Gas & Petrochemical Refining

Models: HEA(M), HMT, HMT(R)

Certified under EU Directive 2014/34/EU for Class IIC gas and explosive dust, Hearken Flow multi-turn electric actuators provide flameproof valve automation across oil and gas facilities. The HEA(M) Series delivers ATEX-certified ON/OFF control for auxiliary tank farm isolation and budget-constrained utility lines. The HMT Series provides high breakaway torque output and mechanical seating for large multi-turn gate and globe valves on high-pressure crude transport lines. The HMT(R) Series integrates non-invasive magnetic setup, LCD diagnostics, and fieldbus/IIoT interfaces for critical refining loops requiring remote monitoring and closed-enclosure servicing.

Chemical & Corrosive Processing

Models: HEA(M), HMT & HMT(R) Series

Hearken Flow multi-turn electric actuators automate acid, alkali, and solvent loops on multi-turn gate, globe, and lined throttle valves across corrosive transfer lines. Durable powder-coated enclosures and high-tensile alloy fasteners protect external components against chemical vapors and salt spray. An independent double-sealed terminal chamber keeps internal control electronics isolated from corrosive plant air during field wiring, while the IP66, IP67, and IP68 sealed housing protects against moisture ingress and washdown operations. Integrated over-torque protection prevents valve stem damage from media crystallization or seat jamming, with available ATEX flameproof certification (Ex db IIC T6 Gb) ensuring safe operation in hazardous chemical environments.

Remote Agricultural Water Pipelines

Model: HMT(R) Smart Series

Hearken Flow HMT(R) smart multi-turn electric actuators provide automated control for canal sluice gates, deep-well pump stations, and long-distance water distribution valves. Built with a non-invasive magnetic setup interface, the IP68 sealed enclosure allows zero-exposure configuration in high-humidity or dusty field environments without unsealing control electronics. High breakaway torque output guarantees reliable operation against sediment buildup and heavy seat friction on large sluice gates. Integrated with optional 4G/5G IIoT modems or ST-RING protocols, HMT(R) actuators transmit real-time valve position and diagnostic telemetry directly to cloud platforms or central water management software—removing the need for local control shelters in remote installations.

Hearken Multi-Turn Actuator Series Comparison

Attribute	HEA(M)	HMT	HMT(R)
Torque Range	50 – 300 N·m	50 – 2,500 N·m	35 – 3,000 N·m
Output Speed	5 r/min	18/24/36 r/min (customizable)	18/24 r/min
Protection Class	IP67	IP65 / IP67 / IP68	IP68
Explosion-Proof	–	ATEX Ex II 2 G/D; ExdII BT4/CT4 (GB3836)	ATEX Ex II 2 G/D
SIL Rating	SIL 3 Capable	SIL 3 Capable	—
Communication	On-off (A220V/W380V), Intelligent Z control circuit	4–20mA analog; Profibus/Modbus/HART/FF/DeviceNet (intelligent type)	Profibus/Modbus/HART/FF native fieldbus support; ST-Ring network (up to 250 devices/host)
Power Supply	AC/DC 24, 110, 220, 380V	AC380V/220V/110V standard; AC660V/440V/415V special; DC12/24/48V	AC380V 50Hz standard
Ambient Temperature	-28°C ~ +60°C	-30°C ~ +70°C (optional -40°C ~ +100°C)	-30°C ~ +70°C
Typical Valve Size	Small-diameter gate/globe valves	Gate, globe, diaphragm valves	Large-diameter gate/globe valves, continuous-duty/hazardous environments

*Not sure which type fits your valve? Send us your valve spec sheet and we’ll confirm the right actuator match.

Protocol	HEA(M)	HMT	HMT(R)
On-Off Control	✓	✓	—
4–20mA Analog	—	✓ (intelligent type)	—
Profibus	—	✓ (intelligent type)	✓
Modbus	✓	✓ (intelligent type)	✓
HART	—	✓ (intelligent type)	✓
Foundation Fieldbus (FF)	—	✓ (intelligent type)	✓
DeviceNet	—	✓ (intelligent type)	—
ST-Ring Redundant Network	—	—	✓ (up to 250 devices/host)

*Not sure which type fits your valve? Send us your valve spec sheet and we’ll confirm the right actuator match.

Feature	HEA(M)	HMT	HMT(R)
Mounting Flange Standard	ISO 5210	ISO 5210	ISO 5210
Flange Sizes	F10 / F12	F10 / F14 / F16 / F25 / F30	F10 / F14 / F16 / F25 / F30
Connection Type	Torque type only	Torque type + Thrust type	Torque type + Thrust type
Drive Sleeve Options	Square drive (17×17, 19×19, 22×22 mm)	Square drive / Trapezoidal thread (Tr28, Tr36, Tr44, Tr60, Tr70)	Type A (thrust) / Type B (non-thrust)
Stem Compatibility	Rising + Non-rising	Rising + Non-rising	Rising + Non-rising
Gearbox Adaption	✓	✓	✓
Double Sealing	✓	✓	✓
Rotatable Cable Entry	—	—	✓ (90° rotatable)
Separated Actuator Option	✓	—	✓ (up to 200m)
Mounting Orientation	360° any angle	360° any angle	360° any angle

*Not sure which type fits your valve? Send us your valve spec sheet and we’ll confirm the right actuator match.

Certification Type	Certificate / Report No.	Notified / Testing Body	Standard / Compliance Specification	Applicable Multi-turn Models
ISO 9001 Quality Management	62724Q1052R0S	JingXin Certification (Beijing) Co., Ltd. (CNAS C275-M)	GB/T19001-2016 idt ISO 9001:2015 (Scope: Design & manufacturing of electric actuators and automated valve assemblies)	Company-wide Manufacturing Scope
ATEX Explosion-Proof	ECM 25 ATEX-B TW47	Ente Certificazione Macchine (ECM, NB 1282)	2014/34/EU Directive Annex III Module B • EN IEC 60079-0:2018+A11:2024 • EN 60079-1:2014+A11:2024 • EN IEC 60079-31:2024 (Marking: Ex II 2 G Ex db IIC T6 Gb / Ex II 2 D Ex tb IIIC T80°C Db IP66)	HMT Series HMT(R) Series
SIL 3 Functional Safety	OP240812.ZHFQW17	Ente Certificazione Macchine (ECM)	IEC 61508:2010 Parts 1-7 (Systematic Capability: SC 3 / SIL 3 Capable)	HEA(M) Series HMT Series
EAC Declaration of Conformity	ЕАЭС N RU Д-CN.PA12.В.06122/25	ООО “ЭКСПЕРТИЗА”	TR CU 004/2011 (Low Voltage Equipment) TR CU 020/2011 (Electromagnetic Compatibility) GOST 12.2.007.0-75, GOST 30804.6.2-2013, GOST IEC 61000-6-4-2016	HEA(M) Series HMT Series HMT(R) Series
RoHS 2.0 Compliance	CHZJ25041469262	Global Testing Services (GTS)	2011/65/EU & Amendment (EU) 2015/863 IEC 62321 Series Standards	HEA(M) Series HMT Series HMT(R) Series
CE Mark (Machinery & EMC)	M.2023.206.C81987	UDEM International Certification	2006/42/EC (Machinery Directive) 2014/30/EU (EMC Directive) EN ISO 12100:2010, EN 61010-1, EN IEC 61326-1	HMT Series

*Not sure which type fits your valve? Send us your valve spec sheet and we’ll confirm the right actuator match.

Attribute	Quarter-Turn Actuator	Multi-Turn Actuator
Rotation Range	90°	Multiple continuous rotations
Typical Valve Types	Ball, plug, butterfly valves	Gate, globe, diaphragm valves
Typical Industries	HVAC, chemical processing, water treatment	Power plants, dams, high-torque continuous-duty applications
Operating Speed	Fast	Slower, higher torque output
Control & Feedback	Built-in positioner/sensor as standard	Multi-turn stroke monitoring, suited to complex control scenarios

*Not sure which type fits your valve? Send us your valve spec sheet and we’ll confirm the right actuator match.

Related Products

China Multi-Turn Intelligent Electric Valve Actuator

Output Torque: 35 – 3,000 N·m
Speed Options: 18 RPM, 24 RPM (standard); 36 / 48 / 72 / 96 / 144 / 192 RPM on request
Power Supply: 380V AC 3-phase 50Hz (standard); other voltages available
Enclosure Rating: IP68
Explosion Protection: IEC ATEX dIICT4
Position Sensing: Magnetic absolute encoder (no battery)
Fieldbus Protocols: PROFIBUS, FF, MODBUS, HART, ST-RING
Analog Output: 4–20 mA valve position feedback
Display: Graphic dot-matrix LCD (Chinese / English, torque / position / alarm)
Flange Interface: ISO 5210 / ISO 5211; custom available
Certifications: CE, ISO 9001-2008, SIL3, ATEX
Warranty: 18 months from startup

external display modulating electric actuator with LCD screen and AM UP DOWN control buttons

Intelligent Multi-Turn Electric Actuator

Torque Rotational Moment: 50 Nm ~ 300 Nm
Motor Power: 380℃ VAC 3Ph, 220 VAC 2Ph, 50/60 Hz ± 10%
Temperature: -20℃ – 60℃
Flanged Connection: ISO 5211 or DIN 3337 Standard
Control: On-off or Proportional Control
Accessories: Proportional Card, limit switch can be added, 4-20 mA Output Smart Type Electric Actuators.
Protection Class: Weatherproof – lP67
Application: GateValves, Globe Valves, Shut-offValves, Diaphragm Valves

Modulating Multi-Turn Electric Actuator

Torque Rotational Moment: 50 Nm ~ 300 Nm
Motor Power: 380℃ VAC 3Ph, 220 VAC 2Ph, 50/60 Hz ± 10%
Temperature: -20℃ – 60℃
Flanged Connection: ISO 5211 or DIN 3337 Standard
Control: On-off or Proportional Control
Accessories: Proportional Card, limit switch can be added, 4-20 mA Output Smart Type Electric Actuators.
Protection Class: Weatherproof – lP67
Application: GateValves, Globe Valves, Shut-offValves, Diaphragm Valves

Multi-Turn On/Off Electric Actuator

Torque Rotational Moment: 50 Nm ~ 300 Nm
Motor Power: 380℃ VAC 3Ph, 220 VAC 2Ph, 50/60 Hz ± 10%
Temperature: -20℃ – 60℃
Flanged Connection: ISO 5211 or DIN 3337 Standard
Control: On-off or Proportional Control
Accessories: Proportional Card, limit switch can be added, 4-20 mA Output Smart Type Electric Actuators.
Protection Class: Weatherproof – lP67
Application: GateValves, Globe Valves, Shut-offValves, Diaphragm Valves

FOCT Standard Multi-Turn Motorized Intelligent Integration Actuator

GOST Standard Intelligent Explosion Proof Multi-Turn Valves Electric Drivers

HMT(R) series multi-turn intelligent electric actuator is a new generation product. Based on the design idea of safety and reliability, it integrates the advanced technology of actuators development and processed two designs with integrated and separated according to the product applications. It can meet the frequent adjust requirement as well as the discontinuous-control, and is widely used in power station, petrochemical, petroleum, chemical, metallurgy, steel, oil pipeline and water treatment and other automation fields.

FAQ

It’s a motorized device that generates torque to control valves or gates. It is specifically designed for systems that need multiple full rotations to fully open or close.

They fit gate and globe valves of all sizes, especially for large-diameter valves.

It depends entirely on your valve’s thread pitch and opening height. You will need to calculate this based on your specific valve parameters.

During setup, you just need to configure the stroke limits, torque limits, and control parameters. This ensures everything runs smoothly.

During debugging, you have to set the stroke limits, torque limits, and control parameters. This ensures the actuator operates normally.

No. Under standard configurations, the display will not light up without the main power supply.

Yes, we can customize this for you. We can equip the actuator with a battery backup module to power the display when disconnected.

Yes, we do. Our HMT and HMT(R) series models meet the IP68 standard and support both Bluetooth and Wi-Fi connectivity.

Yes, it allows you to drive valves requiring higher torque. But let’s clarify the mechanics simply: The actuator’s rated output torque stays exactly the same. The worm gear simply acts as a speed reducer that multiplies that torque. In short, the reducer steps down the valve’s high torque demand to match what the actuator can handle.

Yes. All Hearken Flow electric actuators have built-in thermal protection to prevent overheating and motor damage.

What is the difference between quarter turn and multi turn actuators?

Range of Motion: A Tale of 90 Degrees vs Multiple Turns

Quarter-Turn Actuators
Range: Limited to a 90-degree turn.
Action: Ideal for opening and closing valves in a snap, literally with a quarter turn.
Multi-Turn Actuators
Range: Multiple 360-degree turns, offering a broader range of motion.
Action: Useful for valves that require more rotations to reach their fully opened or closed positions.

Applications: Where Each Finds its Home Turf

Quarter-Turn Actuators
Valve Types: Mainly used for ball, plug, and butterfly valves.
Industries: Widely seen in HVAC systems, chemical plants, and water treatment facilities.
Multi-Turn Actuators
Valve Types: Commonly employed for gate, globe, and pinch valves.
Industries: Often used in power plants, dams, and any other application requiring a high level of torque over several turns.

Speed & Efficiency: Quick Sprints vs Steady Marathons

Quarter-Turn Actuators
Speed: Faster operations due to limited range.
Efficiency: Consumes less energy for short, quick actions.
Multi-Turn Actuators
Speed: Generally slower due to multiple rotations needed.
Efficiency: May consume more energy but can generate higher torque.

Control & Feedback: The Brains Behind the Brawn

Quarter-Turn Actuators
Control: Often comes with built-in positioners and sensors for precise control.
Multi-Turn Actuators
Control: Usually feature more sophisticated control options to monitor multiple turns, making them suitable for complex applications.

The Hearken Promise: Tailored Solutions

It’s not just about choosing between Quarter-Turn and Multi-Turn Actuators; it’s about selecting the right ISO 9001 certified actuator that fits like a glove with your specific needs. That’s where Hearken Actuators and Controls comes into play, offering tailored solutions in valve automation.
So there you have it! Whether you need the quick action of a Quarter-Turn Actuator or the extended capabilities of a Multi-Turn Actuator, now you’re well-equipped to make an informed decision. The ball—or should we say, the valve—is now in your court.

Multi-Turn Electric Valve Actuator for Gate, Globe & Diaphragm Valves

HMT Series Multi Turn Electric Actuators

multi-turn Electric Actuators

HEA(M) Compact Multi Turn Electric Actuator

HMT Multi Turn Electric Valve Actuator

HMT(R) Multi-Turn Intelligent Electric Valve Actuator

Why Choose Hearken?

Company Profile

Quality Control — 8 Stages

ISO 9001

SIL3 OF ELECTRIC ACTUATORS

ATEX Electric Actuator-Hearken Flow Equipment

IP67 Electric Actuators-Hearken Flow Equipment

Rohs Electric Actuators

EAC Electric Actuator

Advantage of Hearken Multi-turn Electric Actuators

Maintenance-Free Drive & Double-Sealed Housing

Leak-Free Manual Override Mechanism

Standard ISO & JB Flange Mounting for Quick Valve Assembly

Integrated Over-Torque & Stem Protection

Native Fieldbus & Industrial Network Integration

Extreme Thermal Adaptability (-40°C to +100°C Options)

Configurable Ingress Protection (IP65 / IP67 / IP68)

Standardized Drive Sleeve Options (ISO 5210)

Gearbox Adaptability & Torque Multiplication

High-Torque Drive Up to 3,000 Nm & Gearbox Expansion

Absolute Encoder with Power-Loss Memory

Power Generation & Steam Systems

Water, Wastewater & Flood Control

HVAC & Commercial Building Water Automation

Oil, Gas & Petrochemical Refining

Chemical & Corrosive Processing

Remote Agricultural Water Pipelines

Hearken Multi-Turn Actuator Series Comparison

Related Products

FAQ

What is a multi-turn electric actuator?

What valve sizes are multi-turn electric actuators suitable for?

How to calculate the stroke and number of rotations of a multi-turn electric actuator?

What safety protection functions do multi-turn electric actuators have?

How to debug a multi-turn electric actuator?

Will the display screen light up if the multi-turn actuator is not powered on?

Is it possible to make the display screen light up when the main power is off?

Do you offer multi-turn electric actuators with an IP68 rating that support Bluetooth or Wi-Fi connectivity?

If a worm gear reducer is added to a multi-turn actuator, does the actuator’s torque increase? Does this allow it to drive valves requiring higher torque?

Do your actuators have thermal protection?

What is the difference between quarter turn and multi turn actuators?

Range of Motion: A Tale of 90 Degrees vs Multiple Turns

Applications: Where Each Finds its Home Turf

Speed & Efficiency: Quick Sprints vs Steady Marathons

Control & Feedback: The Brains Behind the Brawn

The Hearken Promise: Tailored Solutions