OMK-250G DC 24V Electric Actuator 2500Nm

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OMK-250G Part-Turn Electric Actuator (Pure DC Control with Passive Contacts)

The OMK-250G is an ultra-high-capacity, industrial-grade part-turn electric actuator designed and manufactured by OMKEE. Engineered specifically for low-voltage DC power networks (DC 24V), this model operates via an external reversing circuit to manage the opening and closing of 90° valves.

Product Information

Brand:

OMKEE

Model number:

OMK-250G

Standard Torque/Speed:

75S/2500Nm

Control Voltage:

DC24V

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Product Details

Key Component Features & Material Engineering

1. Ultra-Protected ADC12 Aluminum Enclosure

To survive the most punishing outdoor processing environments, the housing is constructed from premium ADC12 die-cast aluminum. The raw casting undergoes an extensive surface treatment regimen: artificial aging, shot-blasting, liquid impregnation (impregnation sealing), and surface oxidation.

It is finished with a premium thermo-sprayed AkzoNobel powder coating thicker than 0.2 mm that safely withstands temperatures above 150°C, preventing peeling, blistering, or corrosion under aggressive chemical vapors or continuous outdoor weathering.

2. High-Efficiency Motor with Heavy Torque Reserve

DC-powered networks often encounter field voltage fluctuations. To handle these fluctuations and clear stubborn pipeline scaling, OMKEE motors feature a 1.3x to 1.5x torque safety reserve. Parameters like thermal rise curves, rotational inertia, and insulation breakdown levels are heavily tested. This ensures the actuator can handle frequent start-stop full loads without stalling under peak pipeline stresses.

3. Spline Drive Connection & Forged Bronze Worm Gear

Managing 2500 Nm of torque requires an uncompromised drive joint. The internal worm wheel is forged from high-strength aluminum bronze alloy, paired with a 40Cr alloy steel worm shaft that has undergone thermal tempering and black-oxide anti-rust plating.

Instead of cheap, single-piece shafts that snap easily under sudden heavy torque shocks, the OMK-250G utilizes a robust spline connection to lock the output shaft and the worm gear together. This design spreads heavy mechanical torque evenly across the drive joint, protecting the assembly from stress failure at the shaft neck.

4. Precision Steel Gearbox & Low-Noise Bearings

Premium Reduction Gears: Cut entirely from high-grade quenched and tempered steel, the gear train delivers high fatigue strength, minimal wear, and low noise. The reduction gearbox box uses cast ADC12 aluminum for stabilized power transmission.
P6 Deep-Groove Bearings: Both ends of the gear units are held firmly by P6-grade deep-groove ball bearings built to the strict EMQ (ZV2) standard. This controls internal vibration and resists sudden load shocks by focusing on optimal raceway surface roughness, ring roundness, and correct retainer design.
Seals & Lubrication: Every unit is filled with imported high-performance Mobil grease and protected by dual-lipped skeleton TC oil seals from the German brand Oubaisi to ensure a leak-free lifespan.

5. Quick External Stroke Calibration

The OMK-250G features an intuitive stroke limit device. Field technicians can quickly calibrate the exact open and close points via an external top adjusting shaft, making commissioning faster, simpler, and highly precise without dismantling the shell.

Design, Machining, and Quality Assurance Protocols

The OMK-250G follows a strict engineering process to ensure reliable performance for global buyers:

UG Software Simulation: Experienced engineers design each part in 2D and 3D based on classical actuator theory and field failure analysis. Fits and stress points are verified via UG (Unigraphics) software simulation before die-cast molds are built.
4-Axis Machining Centers: Fine metal cutting is executed on imported, high-precision 4-axis CNC machining centers equipped with rapid pneumatic clamps. Finished parts pass a Coordinate Measuring Machine (CMM) check to ensure all dimensions meet strict engineering tolerances.
Factory Acceptance Testing (FAT): Before leaving the facility, 100% of production units must pass a mandatory multi-stage inspection sequence.

Pre-Shipment Inspection Protocol

1.Torque Verification Test：Rated Voltage & Under-Voltage Check。

Every unit is tested under rated and negative voltage limits to confirm it retains a 1.3x torque safety margin.

2.Dielectric High-Voltage Test：1500V AC High Voltage for 1 Minute。

Insulation integrity is tested under a 1500V high-voltage charge across the motor coils to ensure zero insulation breakdown.

3.48-Hour Continuous Load Testing：Batch Sampling Audit。

Random production units undergo continuous full-load operational loops for 48 hours to confirm mechanical and thermal stability.

4.Extended Submersion IP68 Testing：0.2 MPa Positive Air Pressure for 10 Min。

Every actuator is submerged in water while its internal chamber is pressurized to 0.2 MPa via the waterproof cable inlet. Zero bubble emission for a full 10 minutes is required to clear the strict leak test.

Overall Dimensions and Performance Parameters

OMK-100/160/250
Parameter\Performance	OMK-100 (AC110V)	OMK-100 (AC220V)	OMK-100 (AC380V)	OMK-160 (AC110V)	OMK-160 (AC220V)	OMK-160 (AC380V)	OMK-250 (AC110V)	OMK-250 (AC220V)	OMK-250 (AC380V)
Motor Power	120W	120W	90W	140W	140W	100W	140W	140W	100W
Rated Current	1.93A	0.94A	0.44A	1.75A	0.96A	0.46A	1.75A	0.98A	0.48A
Standard Time/Torque	30S/1000Nm	30S/1000Nm	30S/1000Nm	45S/1600Nm	45S/1600Nm	45S/1600Nm	75S/2500Nm	75S/2500Nm	75S/2500Nm
Optional Time / Torque	15S/500NM	15S/500NM	15S/500NM	-	-	-	-	-	-
Turning Angle	0~90° Adjustable	0~90° Adjustable	0~90° Adjustable	0~90° Adjustable	0~90° Adjustable	0~90° Adjustable	0~90° Adjustable	0~90° Adjustable	0~90° Adjustable
Total Weight (kg)	17.0	17.0	17.0	18.0	18.0	18.0	18.0	18.0	18.0
Cold Insulation Resistance (MΩ)	AC110V/220V/380V: 100 MΩ/500VDC
Voltage-Withstand Class	AC110V/220V: 1500VAC one minute, AC380V: 1800VAC one minute
Protection Class	Ip67
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℃
Type of Control Circuit	Type A:Ordinal switch type; Type B:Passive signal feedback type; Type C:Resistance signal feedback type; Type D:Resistance signal and passive signal feedback type; Type E: Adjusting type; Type F: With position transmitter; Type G: DC current control type; Type H: AC 380V power control type
Options of other function	★ Stainless steel support, coupling ★Direct installation board, coupling (ISO5211 Standard) ★Over torque protector ★Heater for eliminating moisture

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Global Compliance and Applications

The OMK-250G complies fully with the

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Address: Room 2, 5th Floor, Building 1, Gezhouba Taiyang City, East of Fozuling 2nd Road, South of Gaoxin 4th Road, East Lake High-tech Development Zone, Wuhan, Hubei, China.Mobile phone: +86-18827404378Telephone: +86 027-81388429Email: whomkkj@126.com

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About us

Wuhan OMEC Technology Co., Ltd. is a leading high-tech enterprise specializing in the R&D, manufacturing, and technical service of valve drive devices and industrial automation control systems.

Our flagship OMKEE series electric actuators are meticulously engineered by veteran R&D experts to meet the most demanding industrial environments. We provide compact, high-reliability solutions for modern flow control.