K SERIES: CONSTANT FILL FLUID COUPLINGS

The TRANSFLUID coupling is a hydrokinetic transmission.
The impellers perform like a centrifugal pump and a hydraulic turbine. With an input drive to the pump (e.g. electric motor or Diesel engine) kinetic energy is imparted to the oil in the coupling. The oil moves by centrifugal force across the blades of the turbine towards the outside of the coupling.
This absorbs the kinetic energy and develops a torque that is always equal to input torque thus causing rotation of the output shaft. The wear is practically zero since there are no mechanical connections. The efficiency is influenced only by the speed difference (slip) between the pump and the turbine.
The slip is essential to the functioning of the coupling: there could not be torque transmission without a slip! The formula for slip, from which the power loss can be deduced is as follows:

slip %=((input speed – out speed) / input speed) x 100

In normal conditions (standard duty) the slip can vary from 1,5% (large power) to 6% (small power).

The TRANSFLUID couplings follow the laws of all centrifugal machines:

1. Transmitted torque is proportional to the square of input speed;
2. Transmitted power is proportional to the cube of input speed;
3. Transmitted power is proportional to the fifth power of the circuit outside diameter.

The K Series couplings work using oil but they are also available for water operation upon request.

They are also available certified according to directive 94/9/EC (Atex) covering all categories.