OMK-Ex60H Explosion-Proof Electric Actuator (AC380V Three-Phase Reversing Type)

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)

AC

Brand: Omkee (Wuhan Omkee)

Product Category: Explosion-Proof Valve Automation / Quarter-Turn Three-Phase AC Actuator with Passive Limit Feedback

Compliance Standards: CE / ISO9001:2008 / ExdIIBT4 Gb / IP68

Product Overview

The OMK-Ex60H is an industrial-grade, explosion-proof quarter-turn electric actuator specifically engineered for heavy-duty AC380V three-phase reversing switching control. Tailored for high-power distribution networks, massive process environments, and heavy municipal infrastructure where absolute structural torque stability and immediate operation are vital, the OMK-Ex60H utilizes phase-reversing commutation logic to actuate valves efficiently. It provides exceptional electrical performance under heavy loads, simplified field commissioning, and isolated end-of-travel state telemetry via a dedicated set of integrated passive dry contact position limit switches.

Heavy-Duty Three-Phase AC Reversing Circuit Logic

Engineered specifically to seamlessly interface with plant Motor Control Centers (MCCs) and distributed control systems (DCS), the OMK-Ex60H offers prominent benefits for high-voltage heavy industries:

1. Three-Phase Commutation Control: Actuation is handled directly through phase-reversing circuitry across the three AC380V power lines. This provides exceptional starter torque, balanced grid loading, and fast mechanical response.

2. Isolated Passive Dry Contacts: The positioning mechanism functions independently of internal motor voltage. It generates clean, non-powered (dry) contact feedback for both full-open and full-close limits, preventing line surges from bleeding into monitoring PLC modules.

3. Optimized Power Safety: Perfectly designed for heavy-duty infrastructure and large process systems requiring reliable phase distribution and high-torque mechanical linkages.

Premium Mechanical & Component Features

1. Custom High-Torque 3-Phase Induction Motor

• Engineered explicitly to handle complex field conditions and continuous directional reversing without thermal buildup. All motors are designed to deliver 1.3 to 1.5 times the rated torque requirement.

• Key parameters—such as temperature rise, rotational inertia, and voltage insulation limits—are uniquely optimized and verified through rigorous stress testing to guarantee continuous performance under peak load or frequent-start over-load cycling.

2. Robust Industrial Enclosure

• Material: Premium ADC12 die-cast aluminum alloy for lightweight yet heavy-duty structural integrity.

• Surface Treatment: Subjected to an exhaustive post-casting process including aging treatment, shot blasting, chemical impregnation, and surface oxidation.

• Coating: Finished with high-grade AkzoNobel powder coating (thickness $>0.2\text{ mm}$), delivering exceptional anti-corrosion properties and thermal resistance exceeding 150°C without degradation.

3. High-Torque Worm & Output Shaft Transmission

• Worm Gear: Forged from mathematically proportioned aluminum bronze alloy blanks and precision machined to microscopic tolerances.

• Output Shaft & Worm: Crafted from high-tensile 40Cr alloy steel, subjected to advanced heat treatment for superior toughness, and finished with a black oxide treatment for rust prevention.

• Connection Type: The output shaft and worm gear utilize a highly secure spline connection, completely resolving the shaft twisting and snapping failures common in single-piece machined designs under heavy load stresses.

4. Precision Quenched Reduction Gearbox

• All gear stages within the reduction box are precision-cut from premium quenched and tempered steel, delivering high precision, exceptional structural strength, ultra-low acoustic profile, high fatigue limits, and superior wear resistance.

• Both ends of the reduction gears are supported and aligned by precision deep groove ball bearings to dampen noise and absorb long-term heavy load shocks. The gearbox frame is cast from rugged ADC12 alloy for smooth power transmission.

5. High-Precision Bearings & Professional Seals

• Bearings: All bearings conform strictly to the EMQ (ZV2) low-noise, low-vibration standard, satisfying the P6 precision class through extra-fine raceway polishing, optimized ball roundness, and structured cage alignment.

• Seals & O-Rings: Fully equipped with imported genuine German "Obers" double-lip TC skeleton oil seals and premium gaskets.

• Lubrication: Pre-packed with high-performance imported Mobil grease for lifetime smooth operation.

6. Proprietary Stroke Adjustment Device

• Features an in-house developed, proprietary travel control mechanism. Through a top-accessible "Adjustment Shaft", plant operators can easily calibrate the travel limit switches, making on-site commissioning significantly simpler and more exact.

Rigorous Engineering, Manufacturing & Quality Testing

Every OMK series actuator is designed by engineers with over 10 years of professional expertise. Utilizing advanced UG 3D modeling and simulation software, potential design failure modes are solved prior to mold production. Machining is handled by imported high-precision 4-axis CNC machining centers equipped with quick-loading pneumatic clamping fixtures. Final dimensions are thoroughly audited via a 3D Coordinate Measuring Machine (CMM).

Before leaving the factory, 100% of the products must complete five strict inspection tests:

1. Torque Verification Test: Every unit is tested under rated and negative voltage configurations to guarantee a full 1.3x torque margin capability.

2. High-Voltage Dielectric Test: Tested at up to 1500V for 1 minute across any of the three motor phase lines to confirm that the insulation cannot be breached.

3. Batch Load Endurance Run: Samples are randomly extracted from production batches to run continuously under full-rated torque load for 48 hours to confirm structural integrity and fatigue life.

4. Pressurized Submersible Leak Test: The complete assembly is pressurized internally to 0.2 MPa via the electrical entry cable port and completely submerged in a water tank for 10 full minutes (enhanced security duration). Zero bubble emission is required to pass the IP68 proof standard.

5. Final QA Audit: Dedicated Quality Assurance inspectors carry out a multi-point visual, precise feedback, and mechanical operation final audit on each item prior to boxing and dispatch.

Global Application Fields

The OMK-Ex60H is widely deployed globally across harsh industrial and automated process lines, including:

• Petrochemicals, Oil & Gas: Large oil refineries, cross-country pipeline terminal