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.

2. Dual Signal Tracking & Zero-Gap Gear Joint

The OMK-250E tracks position using an imported Sakae (Japan) conductive plastic potentiometer (0–1000 $\Omega$, linearity error $L \pm 0.5\%$, electrical travel $355^\circ \pm 5^\circ$). To ensure real-time data accuracy, the assembly uses a spring-loaded anti-backlash gear mechanism that eliminates mechanical play and limits actuator hysteresis.

3. Forged Bronze Worm Gear & Spline Shaft Connection

Managing 2500 Nm of torque requires an uncompromised drive joint. The internal worm wheel is forged from a high-wear aluminum bronze alloy, matched with a heat-treated 40Cr alloy steel worm shaft finished with a black-oxide anti-rust plating. To eliminate the risk of structural neck shearing under heavy load torque, the output shaft connects to the worm wheel via a high-strength spline joint that distributes mechanical stress evenly.

4. Precision Gearbox & Low-Noise P6-Class Bearings

All reduction gears are precision-cut from high-grade quenched and tempered steel. The entire gear train is supported on both ends by P6-grade deep-groove ball bearings that follow the low-noise EMQ (ZV2) standard. The chamber is packed with imported Mobil grease and sealed with dual-lipped skeleton TC oil seals from the German brand Oubaisi to ensure a leak-free lifespan.

5. Intuitive External Stroke Limits

The OMK-250E uses a proprietary stroke adjustment mechanism. Field technicians can adjust the open and close limits directly using the external top adjusting shaft, making commissioning fast, safe, and precise without needing to open the primary housing.

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

Global Compliance and Applications

The OMK-250E complies fully with the JB/T8219-1999 manufacturing standard for industrial electric actuators, validated under official test report No. C16040-WT by the Shanghai Institute of Process Automation Instrumentation. OMKEE facilities maintain compliance with ISO 9001:2008 and the European Union CE & RoHS Certification, ensuring complete compatibility with global B2B procurement standards.

Target Applications:

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

• Heavy Processing: Petroleum refineries, aggressive chemical processing, steel manufacturing mills, metallurgy, and paper mills.

• Infrastructure: Municipal water treatment plants, 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).