Performance Parameters Type Power	OMK-EX10
		DC24V	AC110V	AC24V	AC380V	AC220V
	Motor Power	25W	25W	25W	15W	25W
	Rated Current	2.03A	0.57A	2.12A	0.10A	0.32A
	Optional Time / Torque	30S/100NM
	Turning Angle	15S/50NM 20S/70NM			60S/100NM
	Total Weight (kg)	0~360 Adjustable
	Cold Insulation Resistance(M Ω)	5.5
	Voltage-Withstand Class	AC110V/220V/380V : 100MΩ/500VDC
	Protection Class	AC110V/220V : 1500VAC one minute, AC380V : 1800VAC one minute
	Explosive proof grade	IP67
	Installation Angle	ExdIIBT4 Gb
	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	One G1/2 Water-proof Cable Connector（For types with 4-20mA DC, etc. control signals, add one more）
	Options of other function	Type A:Ordinal switch type; Type B:Passive signal feedback type; Type C:Resistance signal feedback type:Type D: Resistance signal and passivesignal feedback type: Type E:Adjusting type: Type F: With positiontransmitter; Type G: DC current control type: Type H: AC 380V power control type
	Options of other function

Brand: Omkee (Wuhan, China)

Product Overview

The OMK-Ex10G is a specialized DC-powered explosion-proof quarter-turn electric actuator engineered by Omkee. Optimized for secure low-voltage industrial grids, it operates on a DC24V power supply and utilizes an external DC polarity reversal circuit to drive precise opening and closing valve operations. Combining a heavy-duty mechanical core with safe low-voltage operation, it outputs a set of passive dry contacts (volt-free signals) at fully open and fully closed positions, delivering a robust and highly secure valve automation platform for hazardous environments.

Key Fields of Application

Fully compliant with rigorous global explosion-proof parameters, this DC-driven actuator is heavily relied upon in fields where low-voltage safety and battery-backup operations are essential:

• Petroleum, Petrochemicals, Oil & Gas Pipelines, and Chemical Engineering

• Power Plants (Both Hydroelectric and Thermal Power Systems)

• Water Treatment, Wastewater Management, and Large Pumping Stations

• Metallurgy, Blast Furnaces, Iron & Steel Mills, and Pulp & Paper Mills

• Pharmaceuticals, Biotechnology, Food Processing, and Building Automation Systems

Premium Component Features

1. Ruggedized ADC12 Outer Enclosure

• Material: Premium ADC12 die-cast aluminum alloy.

• Surface Treatment: Subjected to artificial aging, shot blasting, and an advanced electrostatic powder coating process. The finish features a thickness exceeding 0.2 mm with a thermal threshold capable of resisting temperatures up to 150°C, providing exceptional durability against industrial wear, outdoor weathering, and environmental corrosion.

2. Heavy-Duty Worm Gear & Drive Shaft Assembly

• Worm Gear: Forged using a custom-proportioned aluminum-bronze alloy blank to resist high physical friction and mechanical stress.

• Drive Shaft & Worm: Machined from premium 40Cr alloy steel, structurally enhanced through advanced quenching and tempering heat treatments, and finished with a black-oxide layer for long-term rust prevention.

• Spline Connection: Utilizes a heavy-duty spline interlocking joint between the output shaft and worm gear. This design resolves the mechanical snapping or twisting vulnerabilities inherent in typical unified single-piece casting shafts under high load stresses.

3. Precision Hardened Reducer Gearbox

• All internal speed reduction gears are precisely milled from superior quenched and tempered structural steels, boasting tight tolerances, high precision, low noise, and deep resistance to fatigue and abrasive wear.

• Both ends of the gear trains are firmly anchored by high-precision deep-groove ball bearings to mitigate running noise and absorb extreme physical shock loads.

• The reduction casing is cast independently from ADC12 alloy to maintain rigid gear alignment and smooth torque conversion.

4. Over-Engineered Industrial DC Motor

• Specifically optimized for complex industrial environments and low-voltage field conditions, the motor features a built-in safety margin providing 1.3 to 1.5 times the rated nominal torque.

• Meticulous design optimization has been applied to parameters such as temperature rise, rotational inertia, and dielectric strength, ensuring the actuator frequently starts and reverses reliably under full-load or momentary overload spikes.

5. High-Grade Ultra-Quiet P6 Bearings

• All internal bearings are compliant with the EMQ (ZV2) premium low-noise guidelines, achieving a standardized P6 precision grading with minimal mechanical clearance.

• The ultra-low vibrational footprint is achieved through strict control of raceway/ball surface roughness, ring/ball roundness, and optimized retainer designs.

6. Proprietary Stroke Adjusting System

• The OMK series utilizes an in-house developed dual-limit stroke control mechanism. On-site travel limit commissioning is handled via an intuitive, top-accessible "Adjustment Shaft", making calibration simple, immediate, and extremely accurate.

7. Premium Imported Sealing & Lubrication

• Fluid Seals: Double-lipped skeleton TC series oil seals and structural O-rings are exclusively imported from the acclaimed German Olborz® brand for superior leakage protection.

• Lubrication: Fully packed with premium imported Mobil® industrial grease, sustaining stable viscosity and minimal drag across wide temperature variations.

Rigid Quality Assurance & Production Directives

• Advanced Simulation Design: Developed by senior engineers with 10+ years of industrial experience. All blueprints undergo intensive cinematic and structural stress analysis via UG software before the die-casting molds are manufactured.

• 4-Axis CNC Precision Finishing: Parts are finished on high-precision imported 4-axis machining centers utilizing fast, high-efficiency pneumatic clamping fixtures. Post-machined surfaces are subjected to full dimensional validation via a Coordinate Measuring Machine (CMM) to guarantee compliance with tight design tolerances.

• Mandatory 5-Stage Outbound Testing: Prior to leaving the factory, every single assembled unit must successfully clear:

  1. Torque Margin Test: Tested under nominal and negative line voltages to confirm a mandatory structural torque margin of at least 1.3 times the rated threshold.

  2. High-Potential Dielectric Isolation: High-voltage insulation testing at 1500V AC for a full 1 minute across the motor wiring to ensure zero insulation breakdown.

  3. Continuous Full-Load Endurance: Random batch samples undergo a continuous 48-hour continuous runtime test under maximum load parameters to verify long-term stability.

  4. Submersion Hermeticity Audit: Every unit is pressurized internally to 0.2 MPa via its waterproof cable gland and completely submerged in a testing tank. Zero air bubbles are permitted over an extended 10-minute audit period.

  5. Final Quality Inspection: A dedicated QA team performs a comprehensive visual and functional check on every unit prior to packaging.

Global Certifications

Our production facility is certified under the international ISO9001:2008 Quality Management System and complies with the European Union CE Standards, fully meeting international export quality criteria.