OMK-Ex20E Explosion-Proof Modulating Electric Actuator

Performance Parameter Type

OMK-Ex20

OMK-Ex30

OMK-Ex40

OMK-Ex60

DC24V

AC110V

AC220V

AC380V

DC24V

AC110V

AC220V

AC380V

DC24V

AC110V

AC220V

AC380V

DC24V

AC110V

AC220V

AC380V

Motor Power

35W

40W

40W

30W

50W

40W

40W

30W

70W

90W

90W

40W

70W

90W

90W

40W

Rated Current

3.57A

0.65A

0.37A

0.15A

4.62A

0.65A

0.37A

0.15A

5.13A

1.12A

0.57A

0.29A

5.13A

1.18A

0.60A

0.29A

Standard Time/Torque

25S/200NM

30S/300NM

30S/400NM

45S/600NM

Optional Time / Torque

15S/100NM

6S/80NM

15S/200NM

60S/400NM

Turning Angle

0~90° Adjustable

Total Weight (kg)

10.0Kg

10.0Kg

10.5Kg

10.5Kg

Cold Insulation Resistance(MΩ)

AC

1. Product Overview & Key Features

The OMK Series electric actuators represent the absolute standard in advanced industrial valve automation, engineered with a remarkably compact footprint, universal installation ease, superior structural components, and long-term process reliability. As the highly advanced intelligent flagship configuration for flow regulation, the OMK-Ex20E incorporates a state-of-the-art microprocessing servo controller, facilitating precise proportional valve control driven by industry-standard analog signal standards in explosive and hazardous locations.

2. Wide Fields of Application

OMK products are extensively utilized across diverse industrial automation sectors, including:

• Energy & Natural Resources: Petroleum & Petrochemicals, Oil & Gas Distribution, Power Generation (Hydroelectric & Thermal power plants).

• Heavy Industries: Metallurgy, Iron & Steel mills, Marine Engineering & Shipbuilding.

• Process Manufacturing: Chemical processing, Pulp & Paper manufacturing, Pharmaceuticals, Food & Beverage Processing.

• Infrastructure: Municipal Water Treatment, Agricultural Power Irrigation, and Smart Building Automation.

3. State-of-the-Art Intelligent Servo Controller Features

The OMK-Ex20E is armed with an advanced integrated servo amplifier that ensures elite control fidelity:

• Real-Time Digital Dashboard: Incorporates a high-visibility on-board digital display, broadcasting real-time absolute travel percentage (0-100% valve stroke opening) and active system diagnostic fault codes.

• On-Site Override Flexibility: Supports seamless manual/automatic configuration toggling, enabling plant technicians to carry out rapid localized motorized positioning directly at the terminal box.

• High-Speed Hybrid CPU Architecture: Powered by fully imported, military-grade high-speed CPUs combined with specialized digital-analog hybrid circuitry. Menus-driven parameters calibration delivers immediate commissioning.

• Solid-State Thyristor (SCR) Drive: Utilizes heavy-duty thyristor switching elements instead of mechanical relays, yielding virtually zero control lag time and extreme duty cycle frequencies up to 1200 operations per hour.

• Zero-Oscillation Electronic Braking: Features a proprietary active electronic dynamic braking algorithm that neutralizes motor rotational inertia. It locks coordinates into place instantly on a single approach loop, providing absolute deadband targeting with zero mechanical hunting or oscillation, ensuring positioning accuracies exceeding 0.5%.

• Optoelectronic Isolation Protection: Full galvanic isolation safeguards all incoming analog command lines and outgoing position feedback loops. Combined with a wide-voltage tolerance power unit, it maintains immune operation under heavy electromagnetic interference (EMI) typical of DCS and PLC networks.

• Full Matrix Enclosure Gel Encapsulation: The entire controller circuit board assembly is fully potted and encapsulated with premium protective industrial polymer gel, offering specialized protection against structural vibration, atmospheric dust deposition, thermal drift, and ambient relative humidity.

4. Premium Component Engineering & Technical Advantages

• High-Precision Feedback Potentiometer: Paired with an imported Japanese "Sakae" conductive plastic potentiometer for ultra-precise positioning feedback. Specs include 0-1000 Ohm resistance path, ±15% total resistance tolerance, L±0.5% independent linearity, and 355°±5° total electrical travel. Outfitted with a spring-loaded backlash elimination sub-assembly to nullify mechanical backlash and gear play.

• Heavy-Duty Outer Casing: Manufactured from premium ADC12 die-cast aluminum. It undergoes artificial aging, shot-blasting, and an advanced electrostatic powder coating process. The protective powder layer exceeds 0.2mm in thickness, guaranteeing high thermal stability (tested up to 150°C+) and outstanding chemical/weather resistance.

• Robust Worm Gear Transmission: The copper worm gear is custom-forged from a high-grade aluminum-bronze alloy based on rigorous engineering ratios. Both the output shaft and the worm screw are crafted from 40Cr alloy steel that undergoes specialized heat treatment and black oxide anti-rust finishing. The output shaft connects to the worm gear via a highly reliable spline joint, effectively eliminating the risk of structural twisting or snapping commonly found in single-piece welded components.

• Precision Reduction Gearbox: All speed reduction gears are precisely machined from high-quality quenched and tempered steel. They deliver high precision, immense load capacity, ultra-low operating noise, superior fatigue resistance, and long-term wear resilience. Both ends of the reduction gear trains are stabilized by high-precision deep groove ball bearings to limit gear vibration and effectively absorb intense load shocks. The gear box housing is die-cast from ADC12 aluminum alloy to improve overall transmission stability.

• Heavy-Duty Custom Motor: Built specifically to address fluctuating industrial field voltages and high-frequency modulation needs. Motors are custom-wound to deliver 1.3x to 1.5x the rated output torque. Crucial parameters such as temperature rise, rotational inertia, and insulation breakdown strength are strictly optimized and validated through extensive lab testing, allowing continuous frequent starts under peak load or temporary overload conditions.

• High-Precision Bearings: All rotational components run on specialized low-clearance, low-noise bearings meeting the rigid EMQ (ZV2) standard with a precision rating of P6. Micro-honed raceways and precise ball sphericity suppress physical vibrations.

• Advanced Stroke Control: Features an exclusive, patented stroke control assembly developed in-house. Operators can easily adjust and calibrate the angular limits via an accessible "adjustment shaft" on the top cover, making on-site commissioning significantly simpler and more precise.

• Oil Seals & O-Rings: Integrated with premium imported German "OBOUS" dual-lip skeleton TC oil seals and high-durability synthetic rubber O-rings to prevent fluid ingress and lubricant loss.

• Premium Lubrication: Factory-filled with imported premium heavy-duty Mobil™ industrial grease, sustaining stable viscosity and thermal resistance across extended maintenance-free cycles.

5. Manufacturing Excellence & Strict Quality Control (QC)

Components are drafted by senior engineers with 10+ years of expertise using full 3D CAD modeling and Siemens UG (NX) kinematic simulations. Finishing operations utilize high-end imported 4-axis CNC machining centers with pneumatic clamping rigs. Every batch is rigorously checked on a Coordinate Measuring Machine (CMM) before proceeding to assembly.

Before leaving the factory, 100% of the units must pass 4 severe testing phases:

1. Torque Margin Profiling: Every actuator undergoes full torque profiling at both nominal and negative supply voltage limits to verify a minimum safety margin of 1.3 times the rated torque capacity.

2. Dielectric Strength Test: Tested at an intense 1500V high-potential voltage benchmark across any motor power phase for 1 full minute to ensure zero breakdown in insulation integrity.

3. Heavy-Load Endurance Test: Randomized batch samples are placed on an automated endurance test bed running continuously under full nominal load conditions for 48 consecutive hours.

4. Submersible Leak Test: 100% of final assembled units are pressurized internally via the waterproof cable entry to 0.2 MPa (2 Bar) and fully submerged in water for 1 minute to ensure zero bubble leakage.

Quality Assurance Note