OMK-Ex20B Explosion-Proof Electric Actuator

Performance Parameter Type

OMK-Ex20

OMK-Ex30

OMK-Ex40

OMK-Ex60

DC24V

AC110V

AC220V

AC380V

DC24V

AC110V

AC220V

AC380V

DC24V

AC110V

AC220V

AC380V

DC24V

AC110V

AC220V

AC380V

Motor Power

35W

40W

40W

30W

50W

40W

40W

30W

70W

90W

90W

40W

70W

90W

90W

40W

Rated Current

3.57A

0.65A

0.37A

0.15A

4.62A

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

25S/200NM

30S/300NM

30S/400NM

45S/600NM

Optional Time / Torque

15S/100NM

6S/80NM

15S/200NM

60S/400NM

Turning Angle

0~90° Adjustable

Total Weight (kg)

10.0Kg

10.0Kg

10.5Kg

10.5Kg

Cold Insulation Resistance(MΩ)

AC110V/220V/380V : 100MΩ/500VDC

Voltage-Withstand Class

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

Protection Class

IP67

Explosive proof grade

ExdIIBT4 Gb

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

 

1. Product Overview & Key Features

The OMK Series electric actuators are highly regarded for their exceptionally compact architecture, streamlined installation process, outstanding build quality, and extreme reliability under severe industrial conditions. Engineered to operate flawlessly in volatile environments, these premium quarter-turn electric actuators provide stable and precise automated control for ball valves, butterfly valves, plug valves, and ventilation dampers.

2. Wide Fields of Application

OMK electric actuators are extensively deployed across critical global engineering sectors including:

• Energy & Natural Resources: Petroleum & Petrochemicals, Oil & Gas pipelines, Power Generation (Hydroelectric & Thermal power plants).

• Heavy Industries: Metallurgy, Iron & Steel mills, Marine Engineering & Shipbuilding.

• Process Manufacturing: Chemical processing, Pulp & Paper manufacturing, Pharmaceuticals, Food & Beverage Processing.

• Infrastructure: Municipal Water Treatment, Agricultural Power Irrigation, and Smart Building Automation.

3. Premium Component Engineering & Technical Advantages

• Heavy-Duty Outer Casing: Manufactured from premium ADC12 die-cast aluminum. It undergoes intensive artificial aging, shot-blasting, and a high-durability electrostatic powder coating. The protective powder thickness exceeds 0.2mm, offering supreme thermal resilience (up to 150°C) and excellent anti-corrosion properties under harsh outdoor environments.

• Robust Worm Gear Transmission: The copper worm gear is precision-forged from a custom-proportioned aluminum-bronze alloy and machined to tight tolerances. Both the output shaft and the worm screw are crafted from high-grade 40Cr alloy steel, post-heat treated, and treated with a black oxide finish for supreme anti-rust protection. The spline connection between the output shaft and the worm gear overcomes the common breaking issues inherent to single-piece welded configurations.

• Precision Reduction Gearbox: All speed reduction gears are precision-machined from top-tier quenched and tempered steel, ensuring high precision, immense load capacity, low running noise, outstanding fatigue resistance, and long-term wear resistance. Both ends of the reduction gears are anchored with high-precision deep groove ball bearings to limit acoustic resonance and handle intense torque shocks. The gear box housing is made from die-cast ADC12 aluminum alloy, optimizing transmission stability.

• Heavy-Duty Custom Motor: Designed specifically for fluctuating industrial line voltages and high-frequency modulation requirements. Motors are custom-wound to deliver 1.3x to 1.5x the rated output torque. Advanced performance profiles govern heat dissipation, low rotational inertia, and exceptional dielectric strength, permitting continuous frequent starts under peak load or temporary overload conditions without degradation.

• High-Precision Bearings: All rotational components run on specialized low-clearance, low-noise bearings meeting the rigid EMQ (ZV2) standard with a precision rating of P6. Micro-honed raceways and precise ball sphericity suppress physical vibrations.

• Advanced Stroke Control: Equipped with an exclusive, patented stroke control assembly. Operators can easily modify and calibrate the angular travel limits through an intuitive, accessible "adjustment shaft" on the upper frame, drastically reducing on-site commissioning time.

• Oil Seals & O-Rings: Integrated with genuine imported German "OBOUS" dual-lip skeleton TC oil seals and robust synthetic rubber sealing rings to prevent fluid ingress and lubricant loss.

• Premium Lubrication: Pre-filled with premium imported heavy-duty Mobil™ industrial grease, sustaining stable viscosity and thermal resistance across extended maintenance-free cycles.

4. Manufacturing Excellence & Strict Quality Control (QC)

Every component of the OMK range is drafted by senior mechanical engineers with over 10 years of field experience. Using full 3D/2D CAD modeling and comprehensive Siemens UG (NX) software kinematic simulations, structural flaws are eradicated prior to die-cast mold creation.

Machining is performed using high-precision imported 4-axis CNC machining centers equipped with high-throughput pneumatic fixtures to maintain perfect axial alignment. Post-machining, parts undergo rigorous CMM (Coordinate Measuring Machine) dimension inspections to satisfy strict geometric tolerances.

Before shipping, 100% of the units must pass 4 severe testing phases:

1. Torque Safety Margin Test: Every actuator undergoes full torque profiling at both nominal and negative supply voltage limits to verify a minimum safety factor of 1.3 times the rated torque capacity.

2. Dielectric Voltage Withstand Test: Tested at an intense 1500V high-potential voltage benchmark across any motor power phase for 1 full minute to ensure zero breakdown in insulation integrity.

3. Heavy-Load Endurance Test: Randomized batch samples are placed on an automated endurance test bed running continuously under full nominal load conditions for 48 consecutive hours.

4. Submersible Leak Test: 100% of final assembled units are pressurized internally via the waterproof cable entry to 0.2 MPa (2 Bar) and fully submerged in water for 1 minute to ensure zero bubble leakage.

Quality Assurance Note

Wuhan Omkee is certified under the ISO9001:2008 Quality Management System and carries full European CE marking, ensuring our products meet global export standards. If you have experienced performance issues with standard domestic brands, the OMK series offers an advanced technological alternative built to outperform standard domestic and international joint-venture equipment. Contact us to order your reference sample today.