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.