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Turbine Powered Pneumatic Motors

Perfectly suited to pump, mixer and conveyor applications

Posted on 15 Jun, 2024
Turbine Powered Pneumatic Motors

Significantly reduce energy usage with DEPRAG’s NEW Turbine powered industrial air motors

Energy efficiency is a concern for all businesses, not only because of carbon emissions, but also because it is a big expense. 

A lot of time is spent on reducing energy consumption in industry.  It is well known that compressed air is often a big part of this consumption.  Often, we focus on the compressor efficiency and air leaks, but what about air motors?  In many applications like wet, dirty or hazardous areas we have no option apart from an air motor, but these use a lot of energy, especially if the motors are run on long duty cycles. 

A drawback of using air motors is that they are use a lot of energy.  Typically, a compressor will need 10kW of electricity to produce 1kW of power from a typical vane powered pneumatic motor (source here).  On long duty cycle applications like mixing, driving pumps and conveyors the energy costs and emissions will be significant.

Unfortunately, until recently the only readily available industrial pneumatic motors were vane motors or piston motors.  Furthermore, air motors will double their loaded speed when there is no load, and they use 20% more air when they are under no or low-load conditions. Furthermore, the increased no load speed can damage equipment or cause injury.

The efficiency of air motors can be improved by choosing a high-quality modern vane motor.  Any small saving in air motor efficiency can have a significant savings on energy consumption.  However, standard vane motors still have the problem of high speed and higher air consumption if there is a low load.

DEPRAG Germany, have announced their range of highly efficient turbine powered air motors.  Here is the Catalogue

Turbine motors are the most efficient air motors available and use significantly less compressed air than modern high quality vane motors, they last longer and have less maintenance requirements compared with vane motors.

DEPRAG's new range of turbine motors also include an integrated speed governor which significantly reduces air consumption when there is low or no load and limits the idle speed to about 18% above the loaded speed of the motor.  This keeps the motor speed constant under low load conditions which protects the motor and your equipment as well as reduces air consumption.  

Low air consumption and constant speed under low load are extremely important in conveyor, pump and mixer applications where long duty cycles use large amounts of energy and high speed under low load conditions can cause injury or damage to equipment.

Significant advantages of our turbine compressed air motors compare to vane motors:

  • 40% more efficient
  • Lubrication is not required
  • Longer Lifetime compared to vane and piston motors
  • Integrated Speed Governor
    • reduces air consumption when the motor is no under load
    • prevents damage to pumps, drills, mixers, conveyors etc because the idle speed is close to the loaded speed
    • more constant speed under load
  • Large range of integrated gearing
    • select from 8 loaded speeds from 70rpm up to 2,880rpm
  • Maximum output torque of 409Nm
  • ATEX approved for use in potentially explosive environments
  • Fully Sealed for use in wet environments
  • USDA-H1 Grease for food industry
  • Rust proof housing for wet areas and wash down
  • Adjustable Power of 1.5, 3 and 4.5kW


Please NOTE:

  • Turbine motors are not available as reversible motors so the turn direction must be specified with an order
  • Air supply must be very clean and water free (dew point of -20 DegC or preheated air supply) otherwise the motor will be damaged
  • Due to the efficiency of turbine motors, the exhaust air will be extremely cold, so it must be directed away from people or sensitive equipment.  Ice will form outside of the motor or exhaust pipes, especially if used for long periods of time under full load conditions.