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ED201/12 Explosion-Protected Electro-Hydraulic Thruster
ED201/12 Explosion-Protected Electro-Hydraulic Thruster The ED201/12 is a robust, explosion-proof electro-hydraulic thruster designed to serve as a powerful and safe driving actuator for industrial braking and control systems in highly hazardous environments. It integrates an explosion-proof...
Description
ED201/12 Explosion-Protected Electro-Hydraulic Thruster
The ED201/12 is a robust, explosion-proof electro-hydraulic thruster designed to serve as a powerful and safe driving actuator for industrial braking and control systems in highly hazardous environments. It integrates an explosion-proof motor, a centrifugal pump, and a hydraulic cylinder into a single unit, delivering massive linear force to operate large-scale machinery safely where flammable gases or coal dust are present.
The model number breakdown is as follows:
ED: The series designation for a standard electro-hydraulic thruster (the "B" is often omitted in common naming, but this variant is fully explosion-protected).
201: Indicates the Rated Thrust Force of 20,100 N (approximately 2,000 kgf or 2 tons).
12: Indicates the Rated Stroke (lifting travel) of 120 mm.
Products Description
1. Core Specifications (ED201/12)
Rated Thrust: 2000 N (201 kgf)
Stroke: 120 mm
Voltage: 380V/400V AC, 50/60 Hz
Insulation Class: F (155°C)
Protection Class: IP65 (dust-tight, water-jet resistant)
Explosion-Proof Rating: Ex d IIB T4 Gb / Ex tD A21 IP65 T130°C
Certificates: CNEx 20.0818, CNEx 20.0819 (national explosion-proof approval)
Cycle Rate: Up to 2,000 cycles/hour
Mounting: 0–180° (vertical, horizontal, inclined ≥15°); push rod head 360° rotatable
2. Construction & Working Principle
Flameproof Motor: Non-oil-immersed, F-class insulation; sealed junction box with cable gland; spark/ignition containment for Zone 1/2 (gas) and Zone 21/22 (dust).
Hydraulic Unit: Centrifugal pump driven by motor builds pressure; double-sealed cylinder with wear-resistant rod; balanced air chamber enables multi-orientation mounting.
Operation:
Energized (Release): Motor runs → pump pressurizes → rod extends → brake opens.
De-Energized (Brake): Motor stops → pressure drops → spring retracts rod → brake clamps (fail-safe).
3. Key Features
Explosion Safety: Flameproof enclosure "d" prevents internal sparks from igniting external gases/dust; certified for IIB gases (e.g., ethylene) and combustible dusts (e.g., grain, coal).
Heavy-Duty Performance: 2000 N thrust, 120 mm stroke; high cycle rate for continuous brake actuation.
Durability: Hardened shaft/rod, premium seals, corrosion-resistant alloy housing; long service life in harsh conditions.
Flexible Installation: Balanced air chamber allows any orientation (0–180°); push rod head rotates 360° for easy linkage alignment.
4. Applications
Hazardous Area Braking: Drum/disc brakes for cranes, winches, hoists in chemical plants, oil/gas facilities, grain elevators, coal mines, paint booths.
Industrial Actuation: Valves, gates, swing mechanisms, clamping devices in explosive environments.
5. Compliance & Standards
GB3836.1-2010: Explosive atmospheres – General requirements.
GB3836.2-2010: Flameproof enclosure "d".
GB12476.1/5: Combustible dust environments.
DIN 15430: Industrial brake actuators.
6. Advantages Over Standard Thrusters
Intrinsic Safety: Fail-safe design (closes on power loss) critical for lifting/hoisting.
Harsh Environment Ready: IP65 + flameproofing for high temperature, dust, humidity, corrosive zones.
Low Maintenance: Sealed, robust construction reduces unplanned downtime.
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