The OMK-40E Modulating Electric Actuator represents the intelligent, fully regulative segment of the OMK series engineered by Wuhan Omkee. Integrating all the foundational benefits of the OMK range—including a space-saving compact design, highly convenient installation interfaces, premium manufacturing quality, and robust field reliability—the OMK-40E is specifically optimized for automated proportional valve regulation. Outfitted with an industrial-grade built-in servo controller, this model translates standard continuous analog control loops into precise physical valve displacements.

Overall Dimensions and Performance Parameters

Parameter\Performance

OMK-20

OMK-40

OMK-60

DC24V

AC110V

AC220V

AC380V

DC24V

AC110V

AC220V

AC380V

DC24V

AC110V

AC220V

AC380V

Motor Power

35W

40W

40W

30W

70W

90W

90W

40W

70W

90W

90W

40W

Rated Current

3.57A

0.65A

0.37A

0.15A

5.13A

1.12A

0.57A

0.29A

5.13A

1.18A

0.60A

0.29A

Standard Time/Torque

30S/200Nm

30S/400Nm

45S/600Nm

Optional Time / Torque

15S/100Nm

6S/150Nm 15S/200Nm

60S/400Nm

Turning Angle

0~90° Adjustable

Total Weight (kg)

8.0

8.5

9.0

Cold Insulation Resistance (MΩ)

AC110V/220V/380V: 100 MΩ/500VDC

Voltage-Withstand Class

AC110V/220V: 1500VAC one minute, AC380V: 1800VAC one minute

Protection Class

Ip67

Installation Angle

360° at any angle

Electric Interface

One G1/2 Water-proof Cable Connector (For types with 4-20mA DC, etc. control signals, add one more)

Ambient Temperature (℃)

-30℃~+60℃

Type of Control Circuit

Type A:Ordinal switch type; Type B:Passive signal feedback type; Type C:Resistance signal feedback type; Type D:Resistance signal and passive signal feedback type; Type E: Adjusting type; Type F: With position transmitter; Type G: DC current control type; Type H: AC 380V power control type

Options of other function

★ Stainless steel support, coupling ★Direct installation board, coupling (ISO5211 Standard) ★Over torque protector ★Heater for eliminating moisture

Comprehensive Industrial Applications

Thanks to its advanced processing logic and high ingress protection, the OMK-40E is widely implemented across multi-tier automated process control systems:

• Energy and Power Infrastructure: Proportional fluid flow management in hydroelectric and thermal power plants, and automated power drainage or irrigation networks.

• Heavy Chemical and Process Pipelines: Refining processes, chemical blending systems, paper and pulp mass processing, metallurgy, and iron/steel smelting facilities.

• Utilities and Environmental Plants: Large-scale water purification systems, municipal wastewater processing, and desalination installations.

• Hygienic and Specialized Equipment: Pharmaceutical batching, automated food and beverage processing, and commercial marine engineering systems.

• Climate and Facility Automation: High-demand Building Automation Systems (BAS) for smart modulating HVAC dampers and steam valve regulation.

Premium Component Engineering and Material Characteristics

• Enclosure and Outer Shell: Fabricated from superior-grade ADC12 die-cast aluminum alloy. The housing undergoes specialized artificial aging, shot blasting, and an electrostatic powder-coating finish. The resulting plastic powder protective coat features a thickness exceeding 0.2 mm and comfortably withstands continuous ambient or media temperatures above 150 degrees Celsius, providing excellent anti-corrosion and weatherproofing properties.

• Worm Gear Transmission Assembly: The interior copper worm wheel is forged from a premium-grade aluminum bronze alloy matching precise engineering ratios and machined to tight dimensional tolerances. The output shaft and drive worm are constructed from 40Cr alloy steel, subjected to induction heat treatment, and finished with a black oxide rust-prevention process. The output shaft and worm wheel are connected through a highly dependable internal spline mechanism, solving the structural vulnerabilities of typical one-piece designs which frequently warp or break under peak torque loads.

• Reduction Gearbox Module: All interior reduction gears are precision-machined from high-quality quenched and tempered steel. They deliver high geometric accuracy, exceptional tooth strength, ultra-low operating noise, superior fatigue resistance, and minimal friction wear. Both ends of the reduction gear train are firmly anchored using high-precision deep-groove ball bearings to dampen vibrations and absorb intense shock loads over prolonged operations. The gear casing is cast from high-strength ADC12 aluminum alloy, guaranteeing stable and seamless power transmission.

• Heavy-Duty Electric Motor: To cope with complex industrial fields and continuous regulation requirements, the internal motors are custom-built with a torque safety factor designed at 1.3 to 1.5 times the rated nominal torque. Crucial parameters—such as internal temperature rise, rotational inertia, and insulation strength—undergo specialized optimization and exhaustive laboratory cycle testing. This guarantees that the actuator can execute high-frequency start-stop cycles under full-load or momentary overload conditions without thermal tripping.

• P6 Precision Bearings: All internal bearings feature small clearances, minimal running noise, and high running accuracy, conforming strictly to the premium low-noise EMQ (ZV2) standard with a P6 precision grade rating. This ultra-smooth performance is sustained through extreme control over the surface roughness of both the raceways and balls, ensuring perfect roundness and structural cage balance.

• Proprietary Stroke Control System: The OMK-40E utilizes an exclusive, in-house developed stroke control mechanism. Users can easily calibrate the travel limit switches by using the top-mounted mechanical adjustment shaft. This design simplifies on-site commissioning, significantly reducing setup time while maintaining highly precise valve positioning.

• Premium Oil Seals and O-Rings: Fully equipped with high-grade imported double-layered skeleton TC oil seals and premium rubber sealing rings manufactured by the renowned German brand Oubosu, ensuring an absolute barrier against lubricant leakage and fluid ingress.

• Industrial Lubrication: The gear assemblies are pre-lubricated for life using top-tier imported Mobil brand specialized synthetic lubricants, guaranteeing smooth mechanical efficiency across wide temperature swings.

• High-Accuracy Feedback Potentiometer: Working in conjunction with the electronic controller, the actuator utilizes a Japan-imported "SAKAE" conductive plastic potentiometer. It offers high precision and an extended lifespan with a resistance value of roughly 0 to 1000 Ohms, a total resistance tolerance of plus or minus 15 percent, independent linearity of L plus or minus 0.5 percent, mechanical travel of 360 degrees, and an electrical travel of 355 plus or minus 5 degrees. The integration of a spring-loaded backlash elimination mechanism eliminates gear mesh play, minimizing hysteresis and allowing for real-time continuous position tracking.

High-Performance Servo Controller Features

The intelligent electronic core of the OMK-40E is built on an elite servo controller that offers the following operational characteristics:

1. On-Site Digital Interface: Features an integrated real-time digital display panel that indicates the exact live stroke position of the actuator as a percentage (0 to 100 percent valve opening) and displays diagnostic error codes in the event of an operational fault.

2. Manual/Automatic Interlocks: Supports immediate transitions between automatic loop control and local manual operation, allowing operators to run local electrical valve cycles during startup or maintenance phases.

3. Advanced Processor Architecture: Built with an entirely imported high-speed CPU processor combining analog and digital processing circuits. Features a straightforward, user-friendly menu-based parameter setting matrix that significantly reduces field setup complexities.

4. Thyristor (SCR) Drive Output: Utilizes solid-state thyristor power switching rather than traditional mechanical relays. This guarantees a near-zero time lag and accommodates high-frequency modulating switching rates of up to 1200 operations per hour.

5. Electronic Braking Technology: Incorporates a unique electronic braking logic that counteracts motor rotational inertia. It executes precise, single-step positioning with zero hunting or mechanical oscillation, securing a positioning accuracy benchmark of 0.5 percent or better.

6. Robust Isolation and Wide-Range Power: Optoelectronic isolation is applied across all command input and signal output lines. Paired with a wide-range input power supply design, it delivers outstanding electromagnetic interference (EMI) rejection, making it fully compatible with PLC, DCS, and computer systems.

7. Potted Protection Barrier: The entire circuit board structure is vacuum-encapsulated with a rugged protective compound resin (fully potted), providing excellent defense against mechanical shock, environmental dust, heat conduction, and moisture ingress, while keeping thermal drift to a minimum.

Engineering, Production, and Quality Management

• Simulated Development: Every component of the OMK-40E is drafted by a senior engineering department with more than 10 years of specific valve automation experience. Designs incorporate empirical solutions to real-world plant problems. Complete 2D construction drawings and 3D solid parts models are generated and simulated under kinetic environments using Unigraphics (UG) software before any mold building or casting processes begin.

• Precision Center Machining: The precision machining phase utilizes imported high-accuracy 4-axis CNC machining centers paired with high-efficiency pneumatic fixtures to maximize consistency. Following the machining process, all parts are measured via advanced Coordinate Measuring Machines (CMM) to verify that all critical dimensions, concentricity, and tolerances line up perfectly with design specifications.

• Rigorous Testing Routines: Product assembly strictly follows the standardized Product Assembly Operation Instruction Manual. Every single assembled OMK-40E actuator must pass a strict testing routine consisting of four individual testing stages and a final overarching QA inspection before being approved for factory release:

  1. Torque Calibration Test: Each completed actuator undergoes automated torque testing under both nominal voltage and lower-bound negative voltage levels. This test checks whether the unit consistently achieves its specified 1.3 times rated torque safety margin.

  2. Dielectric Voltage-Withstand (Hi-Pot) Test: Every unit is subjected to high-voltage insulation verification. A potential of 1500V AC is applied sequentially to any one of the three motor power leads for 1 continuous minute. To pass, the internal wiring insulation must show zero dielectric breakdown or leakage current spikes.

  3. Continuous Load Sample Testing: Mass-production batches undergo random sampling for prolonged load testing. Selected units are run under full-load conditions for 4