OMK-250D Part-Turn Electric Actuator (2500Nm / Dual Feedback Type)

Key Component Features & Material Engineering

1. Ultra-Protected ADC12 Aluminum Enclosure

To survive the most punishing outdoor processing 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. Heavy-Duty Motor with 1.5x Torque Safety Margin

Industrial pipelines deal with variable pressure, temperature, and sticky media. To avoid operational jams under peak pipeline stress, OMKEE motors are engineered with a 1.3x to 1.5x torque safety reserve. Parameters like motor temperature rise, rotational inertia, and insulation wear curves are tested rigorously to allow continuous, frequent start-stop cycles under full-load or overloaded conditions.

3. Spline Drive and Forged Worm Gear Joint

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

Instead of weak one-piece shafts that shear under intense stress, the OMK-250D links the output shaft and worm gear using a heavy-duty spline connection. This choice spreads enormous mechanical forces evenly across the drive joint, eliminating structural weak points at the shaft neck.

4. Precision Gearbox & Low-Noise P6 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 housing 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 guarantee a zero-leak system.

5. Quick External Stroke Adjustment

The OMK-250D 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-250D follows a closed-loop engineering process to ensure reliable performance for global buyers:

• UG Software Simulation: Experienced engineers design each part in 2D and 3D. 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, 10% of production units must pass a mandatory multi-stage inspection sequence.

Overall Dimensions and Performance Parameters

	OMK-100/160/250
	Parameter\Performance	OMK-100 (ACV)	OMK-100 (AC220V)	OMK-100 (AC380V)	OMK-160 (AC110V)	OMK-160 (ACV)	OMK-160 (ACV)	OMK-250 (AC110V)	OMK-25 (AC2V)	OMK-250 (AC380V)
	Motor Power	120W	12W	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

Global Compliance and Applications

The OMK-250D complies fully with the JB/T8219-1999 manufacturing standard for industrial electric actuators, 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, metallurgy, and paper mills.

• Energy Systems: Thermal power plants (steam turbine speed control loops) and hydro-generation stations.

• Infrastructure: Municipal water treatment, automated sewage networks, marine shipbuilding, and large-scale power irrigation networks.

• Light Industrial: Food and beverage processing, pharmaceutical cleanrooms, and automated HVAC/Building Automation Systems (BAS).