Industrial Blower"GM Steam Compressor"

Industrial blower"GM Steam Compressor"

Equipped with Kawasaki's proprietary mixed flow impeller, the GM Steam Compressor delivers high efficiency in a compact, lightweight package. Its simple construction makes this top performer highly reliable as well. You can choose a model that's best suited to your needs from our extensive line of products.


  1. High efficiency
    Kawasaki's unique mixed-flow design impeller makes gas to flow smoothly, reduces vortex flow and is more efficient than centrifugal design impellers.
  2. Small inertial moment
    Compared with conventional centrifugal types, the diameter of the mixed-flow impeller is 30 to 40% smaller, so that GD2 becomes smaller and a squirrel cage induction motor can be used.
  3. Compact size, light weight and easy installation
    The blower is compact with its single-stage mixed-flow design that incorporates the integral speed-increasing gear and lubrication oil system. Since space required for installation is small, easy foundation and easy installation is possible with reasonable construction costs.
  4. Low vibration, low noise
    Vibration is extremely low due to the very precisely balanced lightweight rotor. Also, since the basic frequency of noise is high, attenuation is simple and noise can easily be eliminated.
  5. Completely oil free
    Since over-hang type shaft is applied, there is no bearing on the suction side. Suction area completely separated from the oil system enables to supply oil free. Also, a dry gas seal system can be applied for special applications.
  6. Saving energy
    Energy-saving effects are obtained through superior pneumatic performance and inlet vane control even when operating at points other than specified.
  7. Longer operation time
    The structure is simple, with a few parts, and with the rotor and bearing protected completely by oil film. Also, the lightweight rotor and tilting pad bearing with high vibration control mean that only small vibration occurs, enabling continuous operation for long periods.
  8. High reliability
    The GM Steam Compressor is standardized product under the strict quality control at our factory to keep a high reliability and it has proven track record of more than 1,300 units supplied for aerial and various gas applications.


  1. Inlet Guide Vane
    Installed and pre-rotated the inlet gas just before the impeller for flow control with sufficient partial load efficiency.
  2. Labyrinth
    It its provided in the shaft penetrating part of the spiral casing, and is intended to prevent leak of air into the compressor. The material is aluminum alloy or copper alloy. Besides, it is designed so that the sealed steam dose not leak to outside.
  3. Scroll casing
    The steam from the diffuser is collected here and effectively discharged by the smooth spiral volute.
  4. Impeller
    The ideal impeller shape is selected by CFD to further increase efficiency. Also, bending stress due to centrifugal force is minimized with an impeller shape that allows high speed rotation. If required, the impeller can be tested at a speed of over 115% of the rated speed using a special spin tester to confirm its strength. The impeller is made of stainless steel or titanium alloy.
  5. Speed-increasing gear casing
    The speed-increasing gear casing is constructed of an upper half and lower half and has sufficient rigidity and strength to support the speed-increasing gear through bearings. The upper casing can be removed independently and separately from other part, enabling easy maintenance and inspection of the speed-increasing gear.
  6. High-speed rotor
    One-piece shaft is used as high-speed rotor & pinion and the impeller is assembled to the tip of that shaft. The rotor is made of chrome molybdenum steel which is heat-treated for sufficient strength, and it is dynamically balanced by a special balancing machine to assure stable rotation with a minimum of vibration. The thrust of the impeller is transmitted to the low-speed shaft, so a thrust bearing for the high-speed shaft is not required, which greatly reduces the mechanical loss.
  7. Speed-increasing gear
    A helical gear is used, which brings the motor speed up to the impeller rotation speed in a single stage. Both pinion and gear are ground to high-precision teeth, and surface hardening is applied.
    The speed-increasing gear features excellent stability at high-speed rotation with little vibration and noise, assuring a long service life.
  8. Bearings
    White metal lining is used on carbon steel for the bearings. A special profile (our original design) or a tilting pad is used to assure the stability during high-speed rotation.
  9. Oil seal
    Being of labyrinth type made of aluminum alloy, it is provided in the shaft penetrating part of the gear casing, and is intended to prevent leak of oil to outside and leak of steam into gear casing.


Model Selection


【X axis : Suction flow m3/min (90℃ suction, t/h)】
【Y axis : Head m (saturated tempreture rise at 90℃ suction, ℃)】

Dimension and Weight

Dimension and Weight
Model Dimensions (mm) Weight (Ton)
(excluding motor)
GR-20ST 270 570 190 435 1,100 325 1,145 200A 175A 1.0
GM-20ST 270 570 190 435 1,100 325 1,145 200A 175A 1.0
GM-25ST 343 649 260 673 1,260 425 858 250A 200A 1.7
GM-35ST 390 726 340 774 1,420 600 940 350A 300A 2.1
GM-45ST 499 863 425 810 1,580 800 1,025 450A 400A 3.3
GM-55ST 574 885 470 1,122 1,790 900 1,200 550A 500A 5.0
GM-65ST 673 1,077 560 893 2,010 1,050 1,380 700A 600A 6.0
GM-75ST 788 1,169 660 1,322 2,360 1,230 1,407 800A 700A 8.0
(For reference)

Industrial blower Lineup


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