General Product Characteristics

The OMK-40B electric actuator represents a high-performance solution for automation in modern fluid control networks. Developed with state-of-the-art technology, the OMK series is universally characterized by its remarkably compact mechanical architecture, simplified installation footprint, premium manufacturing quality, and maximum operational reliability. It provides outstanding service life even under severe ambient conditions, reducing maintenance overhead and ensuring precise valve modulation.

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 Industry Applications

The OMK-40B is extensively utilized across a wide spectrum of industrial automation fields, including but not limited to:

• Petroleum and Petrochemical: Refining, oil transmission lines, and hydrocarbon processing.

• Chemical Industry: Corrosive fluid transport and chemical dosing control systems.

• Pulp and Paper: Processing loops, bleaching towers, and slurry management.

• Power Generation: Mainstream applications in both hydroelectric power plants and thermal power stations.

• Metallurgy and Steel: Cooling water lines, blast furnace gas control, and oxygen lines.

• Pharmaceutical and Food Processing: Clean utility distribution and batching lines.

• Water and Wastewater Treatment: Sewage purification, desalination plants, and chemical treatment blocks.

• Marine and Shipbuilding: Ballast water management and onboard piping automation.

• Agricultural Engineering: Power irrigation facilities and rural drainage pumping stations.

• Building Automation Systems (BAS): Centralized heating, ventilation, air conditioning (HVAC) dampers, and automated chilled water valves.

Advanced Component Engineering and Structural Design

• Enclosure and External Shell: The main housing is constructed from superior-grade ADC12 die-cast aluminum alloy. Following the casting process, the shell undergoes artificial aging treatment, shot blasting, and high-durability electrostatic plastic powder coating. The resulting plastic powder coat layer maintains a uniform thickness exceeding 0.2 millimeters. This specialized coat exhibits outstanding thermal stability, safely enduring continuous working environment temperatures above 150 degrees Celsius while offering top-tier anti-corrosion properties.

• Worm Gear Transmission Assembly: The interior copper worm wheel is forged from a custom-formulated aluminum bronze alloy based on strict engineering design proportions. The internal output shaft and matching drive worm are machined from premium 40Cr alloy steel that undergoes rigorous heat treatment and a protective black oxide surface processing to prevent rust. The output shaft and worm wheel are joined via a highly dependable internal spline connection. This structural improvement effectively eliminates the vulnerability to twisting and mechanical failure under peak loads seen in conventional single-piece single-material shaft layouts.

• Reduction Gearbox Module: Every reduction gear is precision-machined from high-quality quenched and tempered structural steel. This ensures high dimensional 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 by high-precision deep-groove ball bearings, which control operational vibration and absorb the strong mechanical impacts of continuous load shifts. The underlying gearbox casing is also die-cast from ADC12 aluminum alloy, providing excellent rigidity and ensuring seamless, stable gear engagement.

• Heavy-Duty Electric Motor: To cope with complex industrial field conditions and frequent high-precision modulation demands, the electric motor of the OMK series is custom-built with a safety factor of 1.3 to 1.5 times the rated nominal torque. Key performance parameters—such as internal temperature rise, rotational inertia, and voltage insulation strength—undergo tailored optimization and strict laboratory cycle tests. This guarantees that the actuator can execute high-frequency start-stop cycles under full-load or momentary over-load situations without thermal tripping.

• High-Class Bearing Integration: All bearings installed inside the OMK-40B actuator are engineered with tight internal clearances, minimal acoustic noise signatures, and high running accuracy. They strictly conform to the specialized low-noise EMQ (ZV2) standard and meet the P6 precision grade classification. This low-noise and minimal vibration profile is achieved through microscopic control over the roughness of the raceway and ball surfaces, excellent roundness control of the rings, and a structurally optimized cage layout.

• Proprietary Stroke Control System: The OMK-40B 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: To prevent internal oil leakage and stop ambient moisture from penetrating the housing, the actuator is fully equipped with high-grade imported double-layered skeleton TC oil seals and premium rubber sealing rings manufactured by the renowned German brand Oubosu.

• 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.

Design, Machining, and Comprehensive Quality Assurance

• Engineering and Simulation: Every individual component of the OMK series actuator is designed by specialized engineers with more than 10 years of professional experience in industrial valve automation. Designs are derived from meticulous mathematical theories and empirical analyses of diverse field challenges. Detailed 2D blueprints and comprehensive 3D solid parts models are generated and verified via advanced Unigraphics (UG) CAD/CAM software simulations prior to mold manufacturing and die-casting tool fabrication.

• Precision CNC 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.

• Rigid Testing and Inspection Protocols: Product assembly strictly follows the standardized Product Assembly Operation Instruction Manual. Every single assembled OMK-40B 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 across 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 48 consecutive hours to confirm structural and electrical endurance.

  4. Submersible Hermetic Seal Test: Every individual actuator is subjected to a final immersion seal test. Dry air at a pressure of 0.2 MPa is introduced into the housing cavity via the waterproof cable entry gland, and the unit is fully submerged in a water tank for 1 minute. A total absence of air bubbles confirms the integrity of the shell and seals.

  5. Final Quality Control Audit: Upon passing the above trials, certified quality inspectors conduct a final visual and functional check on each actuator before signing off on its factory clearance certificate.