Name: OMK-Ex05B Explosion-Proof Part-Turn Electric Actuator (50 Nm / Passive Contact Type)
SKU: GTQBSeu0uSUPbaFIW8-xyA

OMK-Ex05B Explosion-Proof Part-Turn Electric Actuator (50 Nm / Passive Contact Type)

The OMK-Ex05B is a compact, heavy-duty explosion-proof part-turn electric actuator designed and manufactured by OMKEE. Specifically engineered for safe valve automation in hazardous environments where volatile gases, vapors, or combustible mixtures are present, it delivers a standard output torque of 50 Nm.

Product Information

Brand:

OMKEE

Model number:

OMK-Ex05B

Standard Torque/Speed:

20S/50Nm

Control Voltage:

DC24V AC110V AC220V AC380V

Explosion-Proof Engineering & Advanced Metallurgy

The OMK-Ex05B is explicitly designed to contain any internal electrical spark or explosion within its chamber, completely preventing ignition from spreading into the surrounding hazard zone.

Ex db IIB T4 Gb Certification: Officially tested and approved by the National Center for Quality Supervision and Regional Test of Explosion-proof Electrical Products (CQST). It fully complies with the latest GB 3836.1-2021 and GB 3836.2-2021 standard updates.
Heavy-Duty ADC12 Casing: The flameproof flame path enclosure is cast from high-density ADC12 aluminum alloy, subjected to artificial thermal aging, and shot-blasted to withstand intense blast pressures. It is protected by a thermo-sprayed outdoor powder layer thicker than 0.2 mm that safely resists working temperatures above 150°C and aggressive chemical vapor corrosion.
Intrinsically Reliable Spline Drive: The internal copper worm gear is precisely forged from high-wear aluminum bronze alloy, matched with a tempered 40Cr alloy steel worm shaft finished with a black-oxide anti-rust treatment. The output shaft and worm wheel are linked via a robust spline connection, preventing rotational shock failure or snapping at the neck.

   
   [Control Switch] ➔ [Flameproof AC/DC Motor] ➔ [EMQ P6 Bearings] ➔ [40Cr Worm Shaft] ➔ [Spline Joint] ➔ [50Nm Safe Output]

Overall Dimensions and Performance Parameters

Performance Parameters Type Power	OMK-Ex05
	DC24V	AC24V	AC110V	AC380V	AC220V
Motor Power	13W	10W	10W	6W	10W
Rated Current	1.28A	1.50A	0.24A	0.07A	0.15A
Standard Time/Torque	20S/50Nm
Optional Time/Torque	4S/20Nm 10S/30Nm				4S/20Nm 10S/30Nm 60S/50Nm
Turning Angle	0 ~ 360° Adjustable
Available Control Circuit	Types of A、B、C、D、E、F、G、H
Total Weight	3.0kg
Insulating Resistance	DC24V/AC24V：100MΩ/250VDC AC110V/AC220V/AC380V：100 MΩ/500VDC
Withstand Voltage Class	DC24V/AC24V：500VAC 1minutes、AC110V/AC220V:1500VAC 1minutes、AC380V:1800VAC 1minutes
Protection Class	IP67
Explosive-proof grade	Exd Ⅱ BT4Gb
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℃
Optional Function	◆Heater for eliminating moisture

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Internal Component Engineering & Materials

Premium Precision Gear Train: All internal reduction gears are machined from elite quenched and tempered steel, ensuring high fatigue strength, minimal tooth wear, and near-silent operation. The gear train is housed inside an integrated die-cast ADC12 gearbox for perfectly smooth torque transfer.
EMQ Standard P6 Bearings: To handle sudden load changes and high vibration profiles, gear shafts are secured at both ends by P6-class deep-groove ball bearings built to the low-vibration EMQ (ZV2) standard. They feature micro-optimized raceway surface roughness, extreme ring roundness, and advanced retainer acoustics.
German Dual-Skeleton TC Seals: The valve actuator uses authentic, twin-lipped skeleton TC oil seals from the German brand Oubaisi, packed with imported Mobil synthetic grease to prevent internal vaporization or grease leaks.
External Calibration System: Limits can be calibrated in the field via OMKEE's proprietary top adjusting shaft. This enables fast, simple switch limit tuning without breaking open the primary explosion-proof enclosure seals.

Quality Assurance & Pre-Shipment Inspection (FAT)

The OMK-Ex05B follows a strict, zero-defect design and assembly pathway managed by engineers with over 10 years of fluid control expertise. All parts are modeled via UG software simulation, machined on imported 4-axis CNC machining centers, and verified by Coordinate Measuring Machines (CMM) to lock in tolerances.

Before leaving the factory floor, 100% of production units must undergo and pass a rigorous testing loop:

1.1.3x Torque Verification Test：Under-Voltage Margin Check。

Every unit is mechanically strained under full rated voltage and negative voltage drop limits to verify it retains a minimum 1.3x torque safety margin.

2.Dielectric High-Voltage Test：1 Minute Insulation Integrity Audit。

Tested under 1500V high-voltage insulation stress for AC 110V/220V (1800V for AC 380V) across any phase line to guarantee zero dielectric breakdown.

3.48-Hour Continuous Load Testing：Batch Random Sampling。

Randomly pulled units undergo 48 hours of non-stop full-load operational reversals to confirm absolute physical and thermal endurance.

4.Submersion Sealing and IP68 Test：0.2 MPa Positive Cavity Pressure。

Every single unit is submerged in water while its internal flameproof housing is filled with 0.2 MPa air pressure via its cable joint. Zero bubble escape for 1 minute is required to pass.

Global Compliance and Applications

OMKEE industrial operations maintain certified compliance with ISO 9001:2008 and the European Union CE & RoHS Standards. The OMK-Ex05B is ready for direct deployment in high-stakes B2B infrastructure across the following hazardous fields:

Petrochemical & Energy: Oil refineries, onshore gas drilling stations, offshore platforms, gas pipelines, and thermal power plant fuel loops.
Chemical Processing: Fine chemical plants, aggressive paint storage depots, fertilizer mills, and pharmaceutical powder cleanrooms.
Industrial Utility: Waste gas scrubbing systems, sewage aeration lines, marine shipbuilding ballast systems, and automated paper mills.

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