Electrohydraulic thrusters ELDROclassic®
Electrohydraulic Thrusters ELDROclassic® Series Ed
The electrohydraulic thruster ELDROclassic® Series Ed by EMG is the industry benchmark for reliable and safe actuation in modern industrial brake systems. Drawing on over 75 years of engineering excellence, these thrusters are designed to meet the rigorous demands of heavy-duty applications such as ports, steelworks, mining, and raw material extraction.
Application & Mode of Operation
ELDROclassic® combines all elements of a hydraulic actuation system into a compact unit. When de-energized, the piston is in its bottom position; when energized, the hydraulic pump moves operating fluid beneath the piston, generating pressure to lift the piston to its full stroke. This allows seamless integration into industrial brake systems, overcoming the counterforce of integrated or external springs, with the stroke length easily adapted to application requirements. The system’s hydraulic principle and robust construction ensure lasting, wear-free performance even in extreme conditions.
Key Advantages
- High operational safety and reliability
- Wear-free, self-lubricating operation for long service life
- Soft and impact-free movement thanks to hydrodynamic technology
- Short actuating times and high switching frequencies (up to 2,000 cycles/hour)
- Continuous operation (S1) in temperatures from -25°C to +50°C (expandable to -45°C to +80°C)
- No risk of mechanical overload during operation
- No thermal protective circuit required
- Simple installation, de-installation, and commissioning
- Stepless extension of lifting/lowering times via optional valves
- Multiple protective features: redundant seals, IP65 (standard) to IP68 (optional), corrosion protection, and chromium-plated piston rods
- Flexible voltage and frequency options; compatible with 230/400 V, 50 Hz as standard
Technical Overview
| Type | Lifting Force [N] | Stroke Path [mm] | Power Consumption [W] | Weight [kg] |
|---|---|---|---|---|
| Ed 12/… | 120 | 40 | 120 | 8 |
| Ed 23/… | 220 | 50 | 165 | 10 |
| Ed 50/… | 500–1200 | 60–120 | 210 | 23–26 |
| Ed 121/… | 1250 | 60–200 | 330 | 39 |
| Ed 301/… | 3000 | 60–150 | 500 | 40–50 |
| Ed 630/… | 6300 | 80–120 | 700 | 70 |
Other models with varying performance, stroke paths, and lifting forces are also available to suit different industrial requirements.
Design & Protective Features
- Three-phase asynchronous motor (2-pole), insulation class F, IP65 (up to IP68 optional)
- Factory-filled with mineral or silicone hydraulic oil
- Robust housing with special coatings available for aggressive environments (up to 280 μm)
- Redundant dust and hydraulic chamber seals for maximum durability
- Optional heating for low-temperature operation and additional parking heaters to prevent condensation
Ideal For
The ELDROclassic® thrusters are ideal for use in industrial braking thruster applications, providing reliable actuation in thruster brake systems for heavy-duty machinery. Designed for high performance and minimal maintenance, they are a trusted solution worldwide.
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