OMK-Ex40F Position Transmitter 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)

AC

Brand: OMKEE (Wuhan Omkee)

Certifications: ISO9001:2008 | CE Standard | Ex d IIB T4 Gb | IP68 Ingress Protection

Advanced Continuous Telemetry & Long-Life Performance: The OMK-Ex40F is a heavy-duty, explosion-proof quarter-turn electric actuator engineered for environments requiring rigorous continuous tracking and remote telemetry. Driven by an advanced built-in position transmitter mechanism alongside a high-torque 400Nm transmission, it delivers seamless 4-20mA current loop feedback and absolute position accuracy, matching the performance limits of premium imported alternatives.

1. Broad Industrial Application Fields

OMKEE high-accuracy telemetry-feedback actuators are widely deployed across safety-critical and highly automated fluid networks:

• Oil, Gas & Chemical Refining: Accurate distance/position tracking for hazardous line valves and distribution loops.

• Power Infrastructure: Remote continuous monitoring of critical water and steam valves in hydro and thermal plants.

• Water Utilities & Treatment: Precision positioning and remote reporting for high-capacity pumps and primary effluent gates.

• Heavy Metallurgy: Robust remote telemetry for heavy damper control drives in steel and smelting mills.

• Advanced Processing: Continuous positioning feedback systems in pulp & paper, pharmaceutical, and food processing lines.

• Marine & Commercial HVAC: Safe, spark-proof automated valve positioning on commercial ships and in complex building automation layouts.

2. Premium Component Engineering

Advanced Multi-Treated Enclosure

• Material: Heavy-duty ADC12 die-cast aluminum.

• Upgraded Surface Treatment: Subjected to rigorous artificial aging, shot blasting, vacuum impregnation (sealing), and surface oxidation.

• Premium Finishing: Coated with authentic AkzoNobel electrostatic powder (thickness $>0.2\text{ mm}$), ensuring excellent chemical resistance and complete thermal stability at temperatures above 150°C.

High-Torque Worm Gear System

• Worm Gear: Forged from a custom-proportioned aluminum-bronze alloy blank and CNC-machined to exact tolerances.

• Worm & Output Shaft: Precision-machined from heavy-duty 40Cr alloy steel, fully heat-treated, and finished with a black-oxide layer for superior rust prevention.

• Spline Connection: Shaft and gear are joined via a heavy-duty spline layout, eliminating the structural weak points and shaft snapping defects common in traditional integrated single-piece shafts.

Precision Quenched Gearbox

• All internal reduction gears are precision-machined from high-quality tempered steel, offering exceptional strength, low running noise, high fatigue limits, and superior wear resistance.

• Both ends of the reduction shafts are anchored by precision deep-groove ball bearings to absorb heavy operational impacts. The reduction housing is die-cast from ADC12 aluminum for maximum structural alignment.

Industrial-Grade Motor

• Engineered to handle complex industrial duty cycles and high-torque demands. The motor handles 1.3x to 1.5x its rated torque.

• Critical parameters—such as temperature rise, rotational inertia, and insulation voltage resistance—are optimized and lab-tested to guarantee continuous, frequent start-ups under full or overloaded capacities.

P6-Grade Low-Noise Bearings

• Internal bearings feature tight clearance, low noise, and high running accuracy, strictly matching the EMQ (ZV2) low-noise standard and a P6 precision rating.

• This is achieved through specialized super-finishing of the raceways, enhanced ball sphericity, and optimized cage configurations.

Japanese Sakae Precision Potentiometer

• Outfitted with an imported Japanese Sakae conductive plastic potentiometer ($0\text{--}1000\,\Omega$ range, total resistance tolerance $\pm15\%$, independent linearity $L\pm0.5\%$).

• Features a unique spring-loaded backlash elimination mechanism to erase gear transmission play. This minimizes actuator hysteresis, guarantees continuous real-time sampling, and significantly increases final valve positioning accuracy.

Advanced Stroke Limit Control

• Features an independently developed, user-friendly stroke control device. Operational calibration and field adjustment are easily executed through the convenient top "Adjustment Shaft," simplifying field commissioning.

Premium Seals & Lubrication

• Outfitted with imported German Obos dual-lip skeleton TC oil seals and premium O-rings for exceptional fluid exclusion.

• The internal gearbox is pre-lubricated for life with authentic imported Mobil industrial-grade grease.

3. High-Precision Integrated Position Transmitter Principle

The OMK-Ex40F features an advanced, built-in position transmitter module providing superior linear reporting:

• Dual-System Current Output: The output stage integrates a highly stable current-sinking absorption circuit, allowing effortless calibration of the current zero-point. It supports both 4-20mA DC and 0-10mA DC control loop protocols.

• Mechanical Displacement Amplification: Equipped with an exposed push-rod tracking mechanism. When pressed, the mechanical displacement is scale-amplified multiple times by an internal amplification assembly, enabling ultra-precise monitoring of micro-travel ranges below $10\text{ mm}$.

• Mechanical Zero Adjustment Mechanism: The tail section of the tracking rod incorporates a rugged mechanical zero-point adjustment block, providing an adjustment range several times larger than the effective stroke. This design entirely overcomes the loss of measurement accuracy common in multi-electrode capacitive transmitters when handling massive zero-point suppression migrations.

4. Engineering Layout & 100% Quality Assurance (QA)

• UG Digital Simulation: Designed by senior valve automation specialists with over 10 years of experience. Structures undergo comprehensive 2D/3D modeling and advanced UG software simulation before die-casting mold approval.

• 4-Axis CNC Precision Machining: Vital components are processed on imported high-precision 4-axis machining centers utilizing high-efficiency pneumatic fixtures to eliminate alignment errors.

• Coordinate Measuring Machine (CMM): Post-machining dimensions are fully verified via high-precision CMM testing to align perfectly with target engineering tolerances.