FLUDEX couplings limit starting and maximum torque in the drive train
Hydrodynamic fluid couplings operate on the Fottinger principle.

FLUDEX® couplings limit starting and maximum torque in the drive train and, through the property of rotational slip, serve as an aid to starting the motor, as overload protection in the event of fault and for isolating torsional vibration. To compensate for shaft misalignment, the FLUDEX coupling is combined with a displacement coupling e.g. of the N-EUPEX type.
When large masses are started up, the drive train is accelerated only at the torque determined by the coupling characteristic. The starting operation is spread over time, the driven machine started softly and smoothly. In the case of special operating conditions, such as overload or blocking of the driven machine, the FLUDEX coupling limits the maximum torque load and prevents the inert effect of the rotating motor mass on the drive train. The coupling then acts as a load-holding safety clutch until the drive is shut off by the motor control or coupling monitoring system. The FLUDEX coupling further acts as a means of decoupling during torsional vibration excitation.
Further information and technical specification catalogue via this link: www.jbj.co.uk/flender-couplings-for-mechanical-power-transmission.html#FLUDEX
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