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Fluid coupling type CPC

The fill-controlled fluid couplings type CPC are particularly suitable for heavy duty use on armored face conveyors in the underground mining industry. Thanks to the innovative XL wheel profile, the coupling transfers up to 60% more power with the same installation space. Power transmission up to 1,600 kW is possible. The CPC series coupling is designed to start your armored face conveyor in a controlled manner even under heavily loaded conditions. The coupling provides very high thermal capacity allowing multiple starts. The CPC coupling significantly increases system availability resulting in the highest productivity of your system.

The hydrodynamic circuit of the coupling is specifically designed for your chain conveyor. The coupling limits the torque in the drive chain to a defined maximum value. This protects the chains and all components against damage. The availability of the armored face conveyor increases and the maintenance costs remain low.

The coupling works with water as a non-combustible and environmentally friendly operating media. Moreover, water is always available underground. No additional and cost intensive explosion protection measures are necessary for the coupling.


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

  • Unloaded motor run-up
  • Smooth start-up of driven machine
  • Protection of the drive chain in case of an overload
  • Torsional vibration dampening of the drive chain
  • Higher power transmission (up to 60%) compared with similar sized couplings
  • Unlimited start up attempts following a blocked armored face conveyor
  • Optimally set torque limit for your system
  • Protects system components - the service life of your system increases
  • Robust and unsusceptible to environmental influences
  • Wear-free power transmission; reduced 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

  • Armored face conveyors


Type Power at 1500 rpm Maximum torque
CPC 1000 1000 kW 15500 Nm
CPC 1200 1200 kW 18000 Nm
CPC 1600 1600 kW 23500 Nm
Type Power at 1800 rpm Maximum torque
CPC 1800 HP 1350 kW
1800 HP
18000 Nm
CPC 2350 HP

1750 kW
2350 HP

23500 Nm
Type L H B
CPC 1000 1350 950 950
CPC 1200 1350 950 950
CPC 1600 1350 950 950
CPC 1800 HP 1350 950 950
CPC 2350 HP 1350 950 950

Dimensions in mm


Technical information

Operating principle

         <br />
        Operating principle of the hydrodynamic power transmission
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-contr. 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.

XL profile

The CPC couplings have an innovative wheel profile, the so-called XL profile. Voith engineers developed this profile with the latest CFD simulation. Drawing on many years of experience and know-how, they managed to get more operating media into the working circuit of the coupling. This leads to a higher power transmission with the same installation space.

Autom. coolant circuit ACC (opt.)

With deviations in the water supply network, ACC offers you the best possible solution. ACC ensures that your coupling always has an optimal water fill level, thus ensuring stable and high power transmission. ACC generates the process to automatically maintain the optimal fill level. A light and sturdy valve unit significantly eases coupling control. The design of the valve stands out due to its very low maintenance requirement. This increases the productivity and cost-effectiveness of your system. ACC is suitable for new couplings as well as for existing units.


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