Kobelion II AG-SG

Discharge air volume
15-75kW Class
Achieved the discharge volume by maximum 21% increase in the world's best level
Achieved the Discharge Volume overcoming the ones of competitors in all models in the class by installing New type of Kobelion's screw unit under thorough & fundamental design.
Load / Unload control in pursuit of reduction of energy loss
Adoption of Load/ Unload control in AG/SG series.
Much better energy saving performance at unloading time comparing with the one of suction throttling type.
Stable air supply & energy saving backed up by reliable Load/Unload control thanks to the capacity control valve processed by a special anodized aluminum (Alumite).
Energy saving logic function for optimal control
Possible to get maximum 6% of energy saving effect by Energy saving logic function, which could minimize excessive load operation for optimal control according to air usage status, installed in AG series.
No belt structure in all models in the class
doption of step up gear as drive system to minimize energy loss caused by belt drive system. Replacement & Adjustment of the belt is no need.
Adoption of inverter cooling fan
Achieved supreme reduction of energy loss by inverter control cooling fan.
Wasteful energy consumption is minimized by the control of fan speed in proportion to the discharge air temperature.
And, the durability is improved by stabilizing the temperature inside the compressor unit.
In AG/SG series, the Inverter cooling fan is available only for 55 - 75kW machine.
Technical improvements of basic performances
Achieved the Maximum level of discharge volume and high efficiency in this range all over the world by improving all parts of components of screw unit in Kobelion II.
Self diagnose function to prevent sudden stop
Electronic monitor having preventive warning system with self-diagnosis function display by 3 stages, Maintenance, Caution, and Emergency-stop. Possible to take quick and accurate countermeasures against emergency-stop case.
Higher Grade Main Motor
Possible to minimize critical troubles of main motor by the protection functions; Klixon Thermal Relay for SG type and thermocouple (thermometer) for VS/AG type.
Water-Removal operation function to prevent the troubles caused by drain-water
Possible to operate in frequent low loading which easily cause drain-water.
Reduction of the time and the labor to remove drain-water from oil reclaimer tank; Preventing the troubles caused by lubricating oil including lots of drain-water.
Preventing the rust troubles caused by drain-water inside oil reclaimer tank.
Momentary interruption, Power outage protection with automatic reset installed
Momentary interruption: 0.1~0.5s (variable)
The operation to be stopped, if the time exceeds 0.5s, the operation could be continued by 0.2s
for AG.On the contrary, the operation should be stopped if the power off time exceeds 0.5s.

Automatic reset: 0.1~20s (variable)
If the power is recovered in 20s after power off, it could be restarted.
Low noise
Achieved excellent noise reduction & vibration reduction by advanced FEM analysis, new designed unit, suitable sound absorber, and so on.
And, achieved further noise reduction for Low noise & mild operating sound by Inverter cooling fan.

※FEM analysis: To analyze overall vibration and noise by dividing objects, which have complex shape and qualities, into small parts.
For Kobelion II, taking higher level of countermeasures for noise reduction & vibration reduction, based on "New FEM analysis" which analyze thoroughly even the surface of objects in the case that internal pressure vibration is given when compressing.
Pursuit of Clean Air
Acquiring clean air by two stage's filtration which is Dust Filter's filtration & Suction Filter's filtration, and suppressing deterioration of lubricating oil quality that could be a main factor of the efficiency drop of oil separation.
Achieved 1.6ppm or less of residual oil mist in the discharge air by three stage's oil separation which is centrifugal force separation, gravity force separation, and filtration.
Residual-pressure start up
In spite of internal residual pressure, possible to start up immediately after motor stop by superior motor torque control in VS series.
Possible to do quick air supply by detection of inside residual pressure in AG series.
Possible to prevent the pressure drop in emergency case because of no blow-off time of 1 min.. That is different from others.
Possible to use Kobelion's screw rotors permanently
Screw Rotors developed by Steel manufacturer of Kobelco with Kobelco's own technology.
Possible to use permanently Screw Rotors, which are made of special steel.
Very easy daily maintenance
Adoption of double lip seal for shaft-sealing part. High Efficiency Interior Permanent Magnet Motors (IPM Motor) than the ones of other inverter compressors having normal induction motor.
No need to remove drain-water from oil reclaimer tank thanks to Water-Removal operation function.
Reduction of the time and the labor for daily maintenance thanks to the electronic monitor with self diagnose function
Maximum Overhaul Interval of 6 years
Achieved the long service life by adopting combination of reliable angular bearings.
High performance, Kobelco genuine lubricating oil
Long service life, High separation efficiency of oil/water, and Less carbon black.
Better performance not only for the service life of the lubricating oil itself, but also for the discharge air & the internal system of the unit.
Large liquid crystal electronic monitor(VS・AG)
Possible to select 3 languages (English, Japanese, and Chinese) in New liquid crystal electronic monitor.
Very easy to handle the electronic monitor for daily maintenance such as pressure setting, operation mode setting, language display setting, and so on.
Even in a dark site, possible to read the information displayed on the electronic monitor of translucent type (Backlight type).
PC connectivity modbus ready
Output of machine conditions to DCS.
Input of operation signal.
Energy saving operation function
In the case of the compressor units having the liquid crystal electronic monitor, possible to do Two-Unit alternate operation without a group control panel by simple
New type controller (SG)
Display of necessary information for operation & maintenance with easy handling.
Possible to select load/unload mode (EC mode) or load/unload+automatic start/stop mode (EL mode) in operation mode.

Discharge air
volume at
Capacity controlload/unload
MotorNominal outputkW152230
TypeTEFC induction motor
No of poles4P2P
InsulationF class
ProtectionIP 55
VoltageV380/415, 50HZ
Starting systemStar Delta
Lubricant(oil)initial volumeL111218
Discharge pipe sizeAR1R1R1.1/2
Discharge air
volume at
Capacity controlload/unload
MotorNominal outputkW375575
TypeTEFC induction motor
No of poles2P
InsulationF class
ProtectionIP 55
VoltageV380/415, 50HZ
Starting systemStar Delta
Lubricant(oil)initial volumeL204046
Discharge pipe sizeAR1.1/2R2R2
The discharge air volume is measured at suction temperature of 30℃ and 75% RH.
The permissible operating ambient temperature is 2~40℃.
Noise levels are measured in an anechoic chamber at 1 meter height,1.5 meter
from the front. [ ] are for values for values for sides and rear.
Air produced by these compressors should not be used in respiratory equipment furnishing air for direct inhalation.

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