OMK-250A Heavy Duty Part-Turn Electric Actuator 2500Nm

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OMK-250A Part-Turn Electric Actuator (2500Nm / Active Contact Type)

The OMK-250A is an ultra-high-capacity, heavy-duty part-turn electric actuator designed and manufactured by OMKEE. Engineered for peak torque requirements in massive fluid control systems, it delivers an extraordinary standard output torque of 2500 Nm to automate large-scale industrial butterfly valves, ball valves, and dampers.

Product Information

Brand:

OMKEE

Model number:

OMK-250A

Standard Torque/Speed:

75S/2500Nm

Control Voltage:

AC110V AC220V AC380V

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Product Details

Key Component Features & Material Engineering

1. Ultra-Protected ADC12 Aluminum Enclosure

To withstand the most punishing industrial environments, the actuator shell 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-Torque Motor with 1.5x Safety Reserve

Heavy pipeline infrastructure and large-diameter valves create immense friction resistance, particularly under high working pressures. To eliminate stalling, OMKEE motors are engineered with a 1.3x to 1.5x torque safety reserve. Crucial factors—such as motor temperature rise curves, rotational inertia, and insulation breakdown limits—undergo strict optimization and rigorous testing to guarantee a high duty cycle under continuous operation.

3. Spline Drive Connection & Forged Worm Gear Joint

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

Instead of cheap one-piece structures that snap under sudden rotational shocks, the OMK-250A links the output shaft and worm gear using a heavy-duty spline connection. This choice spreads enormous mechanical forces evenly across the drive joint, solving common snapping vulnerabilities at the shaft neck.

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-250A complies fully with the JB/T8219-1999 manufacturing standard for industrial electric actuators, officially certified under test report No. C16040-WT by the Shanghai Institute of Process Automation Instrumentation. Furthermore, OMKEE facilities maintain verified compliance with ISO 9001:2008 and the European Union CE & RoHS Certification, ensuring product quality fits global B2B procurement standards perfectly.

Target Applications:

Heavy Processing: Petroleum refineries, aggressive chemical processing, steel manufacturing mills, ironworks, metallurgy, and paper mills.
Energy Systems: Thermal power plants (steam turbine speed control loops) and hydro-generation stations.
Infrastructure: Municipal water treatment plants, industrial wastewater lines, marine shipbuilding, and large-scale power irrigation networks.
Light Industrial: Food processing systems, pharmaceutical cleanrooms, and automated HVAC/Building Automation Systems (BAS).

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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.