ESCO Power
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Variable Fill Fluid Couplings

KPTB

The KPTB is a variable fill fluid coupling designed to be a start up drive or variable speed drive.
The KPTB has an externally driven oil feeding pump and a remote electrically operated ON-OFF valve. When the valve is turned ON the fluid coupling circuit is fed, when it is turned OFF rapid oil drain occurs through orifices located on the periphery of the coupling. The forced bearing lubrication is continuously assured.
The oil pump flow can be operated through oil flow control valve or frequency converter (integrated into the oil feed pump motor), allowing KPTB to be a variable speed drive.
The KPTB range is suitable for powers up to 1700 kW as start up drive and 500 kW as variable speed drive.
The input and output straight shafts can be connected to electric motor and driven machine by elastic and flexible couplings.
Standard accessories include: oil motor pump, oil filter with pressure and temperature gauges, ON-OFF electric valve, oil temperature switch, oil level indicators, connecting wiring box with plug.
Optionals and include: water or air heat exchanger, quick release valves, output pulley, flexible and elastic couplings, cardan shafts and electric control board.

FEATURES
The variable fill fluid coupling allows a disconnect of the motor from the load granting the following advantages:

  • motor start up at no load
  • smooth start up even possible under nominal motor current by full starting control
  • shock and overload protection
  • absorbtion of vibrations
  • high radial load capacity (KPTE)
  • no belt slip
  • remote control by electric valve
  • load positioning
  • cheap and easy maintenance due to external mounting of main accessories like oil filter, feeding pump and control valve
  • longer life thanks to no friction linings to wear out
  • accurate variable speed performances


APPLICATIONS
Start up drive:

  • mills, crushers, wood chippers, grinders
  • belt conveyors
  • reciprocating and centrifugal pumps, compressors
  • marine propulsion
  • generators
  • centrifuges, fans and blowers
  • mixers


Variable speed drive:

  • centrifugal pumps and compressors
  • fans and blowers
  • belt conveyors

KPTO

DESCRIPTION
The KPTO is a fluid coupling enclosed into a box connected to the Diesel engine by SAE housing. The KPTO has been designed to meet the market requirements for a unit combining the technical features of a conventional Power Take Off with the performances of a fluid coupling. The KPTO has an integral feeding pump driven by the Diesel engine.
A remote electrically operated ON-OFF valve allows the fluid coupling circuit feed when turned ON and a rapid oil drain through orifices located on the periphery of the fluid coupling when turned OFF.
The forced bearing lubrication is continuously assured.
The KPTO range is suitable for powers up to 1000 kW.
The engine fly-wheel is connected to the KPTO input by an elastic coupling. The output shaft can be connected to the driven machine by elastic coupling, cardan shaft or pulley.
Standard accessories include: oil feeding pump, oil filter with pressure and temperature gauges, ON-OFF electric valve, oil temperature switch and oil level indicators.
Optionals accessories include: water or air heat exchanger, quick release valves, output pulleys, elastic couplings, output flange for cardan shafts and cardan shafts.

FEATURES
The KPTO drain type fluid coupling allows a disconnect or the engine from the load granting the following advantages:

  • unloaded engine warm up
  • smooth start up, no belt slip
  • shock and overload protection
  • absorbtion of vibration
  • high radial load capacity
  • remote control by electric valve
  • load positioning
  • cheap and easy maintenance due to external mounting of the main accessories like oil filter, feeding pump and control valve
  • longer life thanks to no friction linings to wear out


APPLICATIONS

  • mills, crushers, wood chippers, grinders
  • belt conveyors
  • reciprocating and centrifugal pumps, compressors
  • marine propulsion, boat thrusters
  • fans and blowers

KSL

INTRODUCTION
Transfluid has designed their KSL series variable fill fluid coupling to overcome problems experienced at "start up" and "speed variation" operation for medium and high power machines, driven by electric motors and internal combustion engines.

WORKING OPERATION
Extremely efficient perfomance is achieved utilising the KSL's very simple and effective principle. Oil, that's the power medium, is pumped from a sump through a heat exchanger to the hydrodinamic coupling circuit, where it is finally "drained off" through a series of orifice plugs, back into the sump.

The "START UP" principle:
By controlling the coupling's feed pump oil flow to the working circuit by a small A.C. frequency converter, changes occur inside the coupling working circuit which alter the coupling slip characteristics and this softens the "start up" dramatically.

The "VARIABLE SPEED" principle:
The same principle used to control the start-up permits the KSL to operate as variable speed drive, varying the speed between input and output.

Its "TORQUE LIMITING" function:
Another KSL feature is its ability to limit the torque transmitted, slipping for a time and then dumping its circuit oil, disconnecting the driven machinery.The rapid disconnection is possible by installation of quick realease valve.

The key "KSL" features are:

  • soft start
  • variable speed
  • torque limiting


CHARACTERISTIC

  • Soft starter
    The KSL's fluid coupling working circuit is gradually filled with oil from an empty condition to a fully filled condition. Such behaviour enhances an extremely soft controlled start up, especially with high inertia machinery. The KSL's variable oil feed system is controlled by a frequency converter during the ramp up, producing the ideal soft starter.
  • Accurate speed variation
    By operating either manually or by the frequency converter controller, the KSL always guarantees output speed accuracy, as required by operator or control system.
  • Vibration Dampening
    One of the most important characteristics of KSL fluid coupling is its torsional vibration dampening effect, protecting both the driven machine as well as the motor or engine.
  • Overload Protection
    This is a fluid coupling peculiarity and a big benefit to users. Even more protection can be achieved by installing "quick release drainable valves" which discharge oil from the working circuit in a few seconds, limiting any prolonged overload period completely.
  • High Efficency
    The KSL is an extremely efficient device compared to the constant filled type fluid coupling, as its volume of working ciruit is controlled at the fullest possible volume to mantain a very small slip rate.
  • Shaft Labyrinth Sealing
    These make the KSL series a low maintenance piece of equipment.
  • Ease of Maintenance
    Thanks to its split casing design, it's possible to remove the complete fluid coupling impeller assembly without having to move either the motor/engine or driven machinery, saving the need for realignment and costly down time. In addition all the accessories are externally mounted allowing an easy and fast replacement in case of need.


APPLICATIONS
Mills, Drums, Conveyors, Fans, Blowers, Pumps, Compressors, Centrifuges, Generators or Marine Propulsion drives.

SELECTION
To correctly select the right coupling, Transfluid needs to know the following:

  • Motor/Engine type, power and speed
  • Driven machinery type, power and speed
  • Output speed range
  • Environmental conditions
  • Cooling water characteristics
  • Assembly configuration
  • Drive and driven shaft dimensions and tolerances.

 

Wherever needed, Esco Power, member of the Esco Group with 70 years of experience provides service & distribution of Power Transmissions for your Diesel- and Hydraulic engines in Marine and Industrial Applications. Our team specialized in selection, sales and after sales as well as our products itself are made it possible to offer you the right solution for every marine or industrial application. TWIN DISC Marine Gearboxes & Industrial Power Transmissions Power Take Off`s  Pump Drives, BRADEN-CARCO-GEARMATIC Winches Carco Hoists & Planetary Gearboxes, Nam Jet High-torque & Low speed Water Jets, Transfluid Fluid Couplings, Clutches, Power Take Off`s, Brakes, RBD & Multi Pump Drives TWIN DISC TECHNODRIVE Pump Drives, Power Take Off`s, Gearboxes and Couplings,  CENTA Elastic couplings, MEKANORD Marine Transmissions, COMER Planetary Drives, Axles, OMSI Split-Shafts and Axles, Esco Couplings Rigid & Flexible Couplings, FUNK Transmissions Pump Drives Axles. Esco Power is experienced with designing very demanding drive lines for varies applications like: heavy duty crushers, emergency drive lines, ventilation systems, mixers, parallel hybrid drives etc. Not only we design and sell we do also provide service and have big inventory for spare parts for all these products.