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Fluid coupling type TPK

TPK fill-controlled fluid couplings are mainly used in drives for shredders and fans. The fill level of the coupling can be controlled. This allows load-free motor run-up and controlling of the torque. Thanks to the hydrodynamic principle, the fluid coupling dampens torsional vibrations and torque shocks. This protects your drive and increases the productivity of your equipment.

The heat capacity of the TPK fluid coupling is very high thanks to the active cooling. A smoother start up and acceleration over a longer period of the driven machine are therefore possible.

The fluid coupling is also available with two axially-arranged working circuits
(type DTPK). The parallel working circuits double the power transmission.

With the (D)TPKW the operating medium is water. This coupling is particularly suitable for use in potentially explosive areas.


Voith GmbH & Co. KGaA
Hydrodynamic Couplings
Voithstr. 1
74564 Crailsheim, Germany

Sales, Technical Consulting, Quotations
Tel. +49 7951 32-409
Fax +49 7951 32-213

Service, Spare parts, Repair
Tel. +49 7951 32-1020
Fax +49 7951 32-554

24/7 Technical Emergency Helpline
+49 7951 32-1616

Benefits and uses

  • Load-free motor run-up
  • Smooth start-up of driven machine
  • Protects the drive in case of an overload
  • Dampens torsional vibration in the drive
  • Accelerates heavy masses
  • Protects system components - the service life of your system increases
  • Robust and unsusceptible to environmental influences
  • Wear-free power transmission - reduces maintenance and repairs
  • Automatic load sharing in multi-motor drives protects your motor against overload
  • Sequential startup of the motors reduces the load on the supply circuit

Typical fields of use

  • Shredders
  • Mills
  • Crushers
  • Fans



Type A B F L K H h1
487 DTPK 670 816 204 280 766 923 485
562 DTPK 713 860 190,5 340 806 1000 525
650 DTPK 800 996 233,5 360 980 1106 605
750 DTPK 970 1140 252,5 508 1020 1255 650
866 DTPK 1125 1300 371,25 450 1220 1465 765
1000 DTPK 1250 1580 354,5 500 1500 1695 920
1150 DTPK 1420 1700 425 570 1700 1900 1055

Dimensions in mm

Technical information

Operating principle

Operating principle of the hydrodynamic power transmission

Hydrodynamic couplings transmit mech­anical power from the motor to the driven machine via a flow of fluid. This occurs by means of two bladed wheels positioned face to face. The primary wheel (red) is connected with the motor and acts like a rotary pump, the sec­ond­ary wheel (blue) is connected to the driven machine and acts like a turbine. Power transmission is pro­por­tional to the fill level in the working circuit. As a result of the mechanical separation of the drive and driven sides, the hydro­dynamic couplings transfer the power wear-free and dampen the torsional vibration and torque shocks in the drive chain at the same time.

Fill-controlled couplings

With fill-controlled couplings, a control device continuously changes the transmission behaviour. This is carried out by changing the filling level and is made possible by controlling the flow of the operating fluid supply and draining using valves.

Fill-controlled couplings have an external fluid circuit that is also used for cooling. This is why these couplings have a very high thermal capacity that makes longer start up procedures with high loads possible. This increases the productivity and reliability of your system.

When starting, fill-controlled couplings are completely empty thus enabling a load-free motor run-up. This relieves and protects the motor and electric network.


Voith doesn't just supply couplings, we are also your engineering partner for customer-specific drive solutions:

  • Designing of complete drives
  • Dimensioning the coupling for the optimal use of your system
  • Analysis and optimization of the operating state of drives in existing systems (retrofit)
  • We can advise you about the selection of optimal start-up technologies
  • Competence in systems for all mining equipment and the bulk material industry


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