ELDRO® Direct current series
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ELDRO® Direct current series
ELHY® Electrohydraulic thruster Call for Price
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ELDRO® Direct current series
Conductive plastic potentiometer LP-22 Call for Price

ELDRO® Direct current series

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Areas of application

ELDRO® DC devices are used in systems with an existing direct current power supply. The devices must be connected electrically in parallel to the motors. An electrical connection of the ELDRO® motors in series is not possible.

The ELDRO® DC series is also used to open brakes in the event of a voltage breakdown of the three-phase supply. In this case, these devices are installed in the brake as an additional brake thruster. These devices can then be supplied with a direct current voltage, for example, from a battery. This, for example, enables loads in the lifting unit to be lowered and set down safely.

SKU: 860d0194b2ec Category:
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Electrohydraulic thrusters ELDROclassic®

Electrohydraulic thrusters ELDROclassic®

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Highest quality – Maximum safety MODE OF OPERATION All elements of a hydraulic actuation system are combined in the electrohydraulic thrusters from EMG to produce a compact assembly. When switched off, the hydraulic piston with the piston rod is located in its lower end position. When switched on, the hydraulic pump pumps the operating fluid beneath the piston and, in doing so, generates the hydraulic pressure here. This moves the piston up to the maximum stroke path. When doing this, the counterforce – which is generated through an integrated brake or return spring, or an external load (e.g. a brake) – must be safely overcome. The maximum stroke path of the devices can be externally arbitrarily limited. This can be the case if the brake to be actuated only requires a reduced stroke path for complete opening. In the respective piston end position, the power consumption of the motor reduces in comparison to the power consumed during the lifting process due to the laws of hydraulics. The pressure in the device reaches its maximum value here. The drive motor is therefore relieved in the resting position of the piston. Mechanical overloading of the devices is not possible. Characteristic features The electrohydraulic system used by the ELDRO® devices, in conjunction with the straightforward integration in brake systems and the simple electrical commissioning process, result in the following features for the diverse operating conditions:
  • High operational reliability
  • Long service life thanks to wear-free operation with permanent self-lubrication
  • Soft and impact-free operation as a systemic result of the hydraulic operating principle
  • Short regulating times
  • Approved continuous operation S1
  • High switching frequency of up to 2000 cycles per hour in switching mode S3
  • Reversing operation without any restrictions
  • Easy installation and removal
  • Arbitrary direction of motor rotation, therefore no changeover contactors required
  • Overloading is not possible during Operation
  • Arbitrary external limitation of the stroke path
  • Stepless extension of the lifting and/or lowering times through the installation of valves
  • The fill level of the operating medium is optimised according to the operating conditions and requires no further inspection.
  • Broad standard temperature range from –25 °C to +50 °C, expandable to –45 °C to +80 °C with additional equipment, e.g. heating and use of special operating media
  • No thermal protective circuit required
  • No sensitive electronic and sensory installation parts needed for the operating principle
Installation and Operating Instructions

Installation and Operating Instructions

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Here you will find all installation and operating instructions for our EMG ELDRO® and EMG ELHY® product ranges as well as translations in numerous languages. Installation and Operating Instructions ELDRO®/ELHY® Downloads Here you will find the available installation and operating instructions for our EMG ELDRO® and EMG ELHY® product ranges. We will be happy to provide translations of these explanations in other languages on request. Talk to us. German / English / French / Russian
ELDRO® Explosion-proof series

ELDRO® Explosion-proof series

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Areas of application Gases, vapours, fumes and dust are generated or escape during the production, processing, transport and storage of combustible substances in many industrial sectors. When combined with oxygen, an explosive atmosphere can develop. If this ignites, it can result in explosions and cause serious personal injury and material damage. The sectors concerned include, for example, the chemical and petrochemical industries, pharmaceuticals, oil and gas production, mining, as well as the food industry, the biofuel industry and the wastewater sector.´ Explosion-protected ELDRO® devices are ideal for these areas of application. They comply with current regulations and standards and can be used in a variety of ways. Hazardous area:
  • I M2 (Mining)
  • II 2G for zone 1 and 2 (above ground)
  • II 2D for zone 21 and 22 (above ground)
Certificate of conformity:
  • ATEX - BVS 05 ATEX E 074 X
  • IECEx - IECEx BVS 12.0014X
  • TP TC - RU C-DE.ГБ04.В.00477
ELDROdynamic®

ELDROdynamic®

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Characteristic features The electro-hydraulic system of the ELDROdynamic® thrusters in conjunction with their easy integration into brake systems and the simple electrical commissioning result in the following features for a wide range of application conditions:
  • Lower power consumption and self-heating due to the use of efficiency class IE3 motors and optimised pump geometry
  • Closing times ≤ 200 ms and stroke times ≤ 700 ms are achieved with ELDROdynamic® (determined at 80 mm stroke)
  • Maintenance and service friendly due to modular design
  • Stroke lengths up to 500 mm are possible, differing requirements on request
  • High operational reliability (failsafe)
  • Long service life due to wear-free operation
  • Soft and shock-free operation, due to the hydro-dynamic mode of operation
  • Approved continuous operation S1 and switching operation S3 up to 2,000 operations per hour
  • Any motor rotation direction
  • Overloading during operation is not possible
  • Continuous adjustment of lifting and/or lowering times by installing valves
With additional equipment the ELDRO®dynamic becomes: ELDROdigital® If required, the ELDROdigital® electrohydraulic thruster can be equipped with sensors of different Tipss as well as an IO-Link-compatible evaluation electronics to record and evaluate sensor and operating data for connection to a condition monitoring system. Possible additional equipment:
  • pressure sensor
  • analogue displacement transducer
  • temperature sensor
  • force sensor
  • end position sensing
ELHY® Electrohydraulic thruster

ELHY® Electrohydraulic thruster

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Function principle The ELHY® devices are available in three different series, all of which exhibit the same functional principle, the same internal design and the same external shape. The motor housing accommodates the stator of the drive motor, which is designed as a three-phase asynchronous squirrel cage motor. The motor runs in the operating fluid. The electrical connection is established via the terminal box, which tightly seals the motor housing. The cast feet on the motor housing are used to secure the ELHY® device in place. The impeller of the pump is attached to the motor shaft. The guide cylinder with the axially movable piston is located above the impeller. The interior of the device is filled with hydraulic fluid up to the level of the filler hole.
EMG ELDRO® – New Generation

EMG ELDRO® – New Generation

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EMG ELDRO® - The best of two worlds - The new generation EMG ELDRO® - THE Thruster Every day, our customers entrust us with the safety of their equipment and goods, but more importantly, they entrust us with the safety of the people who work with crane systems and suspended loads. Our EMG product portfolio serves every conceivable customer requirement, regardless of industry, environmental conditions, installation size and location, or force or speed requirement. We deliver 100% variety, 100% quality, 100% durability and 100% reliability. Based on flow numerical calculations and simulations - know-how we now have in-house - we have perfected the proven technology of EMG thrusters in a new generation: EMG ELDRO® - THE Thruster. The new generation EMG ELDRO® combines the best of our previous ELDRO® and ELHY® series, incorporates all the experience gained over decades for applications in various areas. Thanks to numerous new technologies and the use of CFD simulation (Computational Fluid Dynamics), our new thrusters can be used even more efficiently and individually! At the same time, we remain true to the purely mechanical functional principle, which does not include any electric valves or electronic components in the basic functionality. As always, we thus ensure 100 % reliability and maximum ease of maintenance. The thrusters of this new generation offer: -more safety and comfort, -higher performance with smaller sizes, -higher efficiency and faster cycle times, -application in higher temperature ranges, -inner position displays, -higher ease of maintenance. More detailed information will follow in the coming weeks! Be curious! THE ORIGINAL. BE SAFE.