OMK-250B Part-Turn Electric Actuator (2500Nm / Passive Contact Type)
Product Information
Brand:
OMKEE
Model number:
OMK-250B
Standard Torque/Speed:
75S/2500Nm
Protection Class:
IP68
Control Voltage:
AC110V AC220V AC380V
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Key Component Features & Material Engineering
1. Ultra-Protected ADC12 Aluminum Enclosure
To survive the most punishing outdoor processing environments, the actuator casing is built from premium ADC12 die-cast aluminum. The raw casting undergoes an extensive multi-stage 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
Large industrial pipeline networks and high-diameter valves create immense friction resistance, particularly under high working system pressures. To ensure seamless operation, OMKEE motors are engineered with a 1.3x to 1.5x torque safety reserve. Crucial factors—such as motor temperature rise, rotational inertia, and insulation wear curves—are heavily optimized. This allows the actuator to handle frequent start-stop full loads without stalling.
3. Spline Joint and Forged Worm Gear Drive
Managing 2500 Nm of torque requires an uncompromised drive joint. The inner copper worm wheel is forged from a high-performance aluminum bronze alloy, paired with a 40Cr alloy steel worm shaft that has undergone thermal tempering and black-oxide anti-rust plating.
Instead of fragile, cheap one-piece structures that snap under sudden rotational shocks, the OMK-250B connects the output shaft and the worm wheel via a high-strength spline connection to distribute enormous mechanical forces evenly across the drive joint, eliminating structural weak points 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-250B complies fully with the JB/T8219-1999 manufacturing standard for industrial electric actuators. It is officially certified under test report No. C16040-WT by the Shanghai Institute of Process Automation Instrumentation. Furthermore, OMKEE manufacturing plants maintain verified compliance with ISO 9001:2008 and the European Union CE & RoHS Certification, making this product ready for direct export into world markets.
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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