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Lifting Columns And Other Electric Actuators

Ema Elfa

IP65 | ExZE, ExZEM series

Article: 00075776

Linear actuator / electro-hydraulic / spring-applied brake

Operation of the release consists in advance of the piston rod with appropriate force and to specic stroke.
With built-in return spring, return of the piston rod also occurs with appropriate force.
Electrohydraulic release nds application mainly in brakes for releasing (opening) shoe brakes. With built-in spring, it not only releases the brake but also generates braking torque. The release can be used for all applications requiring to-and-fro movement, e.g. to actuate gates and valves, to open and close aps and doors, to raise and lower barriers, to move levers and pull-rods as well as to execute operations of to-and-fro movement in various machines and equipment.
The release can be used both for continuous operation S1 as well as for periodically interrupted operation S3 with relative loading time up to 100% and number of actuations up to 2000 c/h.



Operating conditions



Electrohydraulic release is designed for operation in mining plants in which methane hazard or coal-dust explosion hazard occurs (equipment group I category M2) as well as in places other than those mentioned above which are endangered with occurrence of explosive atmosphere (equipment group II category 2 GD) Ex IM2/II 2 GD.
This release is an explosion-proof device with ame-proof enclosure group I and IIB of temperature class 125°C (T4), with signaling circuits of spark-proof version: Exd[ia] I/IIB 125°C (T4). As a device protected by its enclosure tD, the release can be used in the presence of inammable dust in zone 21 and 22: Ex tD A21 IP65 T125°C.
Bimetal sensor or posistor sensor can be connected in the spark-proof circuit according to PN-EN 60079-11 of
maximum voltage 30V.

Specifications

  • Movement: linear
  • Type: electro-hydraulic
  • Applications: spring-applied brake

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