OMK-250A Part-Turn Electric Actuator (2500Nm / Active Contact Type)
Product Information
Brand:
OMKEE
Model number:
OMK-250A
Standard Torque/Speed:
75S/2500Nm
Control Voltage:
AC110V AC220V AC380V
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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
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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:
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Heavy Processing: Petroleum refineries, aggressive chemical processing, steel manufacturing mills, ironworks, metallurgy, and paper mills.
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Energy Systems: Thermal power plants (steam turbine speed control loops) and hydro-generation stations.
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Infrastructure: Municipal water treatment plants, industrial wastewater lines, marine shipbuilding, and large-scale power irrigation networks.
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Light Industrial: Food processing systems, pharmaceutical cleanrooms, and automated HVAC/Building Automation Systems (BAS).
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