7C-8J, I. S. Gajra Industrial Area - 1, A.B. Road,
Dewas - 455001 M.P. INDIA
Email info@fluidomat.com
Devonshire House, 60 Goswell Road,
London, United Kingdom, EC1M 7AD.
Email sundeep@fluidomat.com

FNCT Fill Control Coupling

Fluidomat FNCT

FNCT fluid couplings working on principle of hydro dynamic power transmission with fill control are ideal as start up and accelration control equpments for large drive motors.
Combined with electronic control. They provide additional safety to drive motors and torque transmission control.


FNCT Fluid Couplings working on principle of hydrodynamic power transmission with fill control are ideal as startup andacceleration control equipments for large drive motors. Combined with electronic control they provide additional safety to drive motors and torque transmission control.


The Impeller(Pump)and Rotor(Turbine) enclosed in a primary casing have another casing(secondary). A fixed position Scoop Tube is provided to continuously collect the oil released by leak off nozzle from working circuit.The Impeller and Rotor are connected by shafts for onwards connection to motor and driven machine shaft through suitable flexible couplings.The shafts rest on ball and roller bearings on suitable bearing housings. The whole rotating assembly is housed in a robustly built stationary self supported housing of welded construction. A motor driven oil pump is provided to circulate working oil through the oil circuit of FNCT Coupling. Two No. solenoid valves and Two No.non return valves are provided which control oil level into the FNCT working circuit. A lube line branching out from pump out let continuously feed soil to bearings irrespective of oil level in working circuit.


The circulating oil pumped by motor driven oil pump flows into the working circuit of fluid coupling through an oil collection ring and then into the working circuit. The leak off nozzle continuously drain soil from working circuit into the secondary casing from where it is collected by the fixed position scoop tube. This oil passes through an oil cooler and gets re-circulated into the working circuit of fluid coupling(achieved by solenoid valve operation) without flowing back into oil tank or flows back into oil tank for declutching or acceleration control. Any desired oil level between complete empty 0% to complete full 100% of working circuit can be achieved by adding or removing oil from working circuit by operation of solenoid valve. The torque transmitted by the coupling depends on oil level in the working circuit and thus the torque transmission during starting or running can be controlled resulting into several advantages. For declutching of coupling at any time during operation the complete circuit can be emptied by operation of solenoid valves. During machine acceleration control the oil level in working circuit can continuously bead justed i.e. increased ordeR increased by operation of solenoid valves through an electronic control which monitors motor power and machine speed.


  • No load start up of drive motor thus faster decay of starting current and improved and reliable motor protection.
  • Wear free power transmission by virtue of circulation of oil.
  • Smooth and controlled start up and acceleration control of driven machine.The acceleration time can run upto several minutes.
  • Gradual and shock free build up of break away torque.
  • Clutching and declutching of driven machine with motor running.
  • Dampening of shock loads and torsional vibrations/oscillation.
  • Flexibility of operation with electronic control.
  • Suitable for multidrives inconvey or with load sharing and sequential startup.
  • The empty belt can be moved at low speeds for inspection and adjustment.
  • Cooling of oil in coupling achievable when coupling instand still condition.
  • Suitable for adaptation of various types of flexible couplings.
  • Robust design and construction with trouble free operation industy,hot and humid ambient conditions.
  • Simple design,easy to operate and low maintenance.


The FNCT couplings can be used in variety of applications as a startup duty and controlled and smooth acceleration of heavy masses and inertia.Ideally suited for Belt and Pipe Conveyor application.
Typical applications include:
  • Belt conveyor soon underground mines or on surface installations.
  • Pipeconveyors.
  • Crushers.
  • Balland Rod Mills.
  • Shredders.
  • Armored Face Conveyors(AFC).
  • Mixers.
  • Beaters.
  • Other typical applications.
FNCT Maximum Rating KW at different input speeds - RPM
500 600 720 750 900 1000 1200 1500 1800
566 12.2 21.1 36.5 41.2 71.3 97.8 168.9 330 570.2
655 24.8 42.9 74.1 83.7 144.7 198.5 343 670 1157.2
750 49.6 85.7 148.2 167.5 289.4 397 686 1340 --
810 68.7 118.7 205.2 231.9 400.7 549.7 950 1500 --