OMK-Ex60F Explosion-Proof Electric Actuator (With Position Transmitter)

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 Electric Actuator with Active Position Transmitter

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

Product Overview

The OMK-Ex60F is a highly sophisticated explosion-proof quarter-turn electric actuator uniquely configured with an integrated heavy-duty current-loop position transmitter. Engineered for advanced industrial automation architectures that rely on external AC switching commands while demanding highly accurate, continuous analog position feedback (4-20mA DC), this model delivers excellent long-distance signal integrity. Characterized by its compact physical structure, simplified field commissioning, world-class internal components, and absolute stability under heavy industrial loads, it serves as an optimal solution for hazardous area valve management.

Advanced Current Loop Position Transmitter Operation

The standout feature of the OMK-Ex60F is its proprietary integrated position transmitter, meticulously designed to resolve standard analog signal drift and calibration difficulties in remote industrial control networks:

1. Current Absorption Circuitry: The output terminal features a specialized current absorption configuration, ensuring zero-point calibration is streamlined, uniform, and less sensitive to long-distance cable resistance.

2. Dual Signal Compatibility: Supports both standard 4-20mA DC and legacy 0-10mA DC system architectures seamlessly.

3. Micro-Stroke Mechanical Amplification: Incorporates an external push-rod mechanism linked to an internal displacement amplification layout. This structure multiplies the stroke travel path, allowing high-precision measurement and telemetry for micro-strokes within a 10mm range.

4. Mechanical Zero-Point Adjustment: Equipped with a mechanical zero-setting mechanism located at the base of the push-rod. Its calibration range spans multiple times the effective travel path, completely eliminating the loss of accuracy that limits multi-electrode capacitive transmitters when zero-migration is excessively wide.

Premium Mechanical & Component Features

1. High-Precision SAKAE Potentiometer Integration

• Driven by a genuine Japanese "SAKAE" conductive plastic potentiometer coupled to a specialized spring-loaded anti-backlash gear assembly. This combination entirely eliminates gear clearance, minimizes mechanical hysteresis, and delivers consistent real-time sampling (0-1000 Ohms nominal, independent linearity $L\pm0.5\%$) for maximum position detection accuracy.

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-Performance Industrial Motor

• Engineered explicitly to handle complex field conditions and high-frequency start-stop regulations. 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 over-load cycling.

6. 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" dual-lip TC skeleton oil seals and premium gaskets.

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

7. 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 motor phase line without insulation breakdown or leakage.

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