132 – 400 kW
Discharge air flow
By developing state-of-the-art air-ends and optimized package design, we achieved best in class specific power consumption as well as utmost durability. Here, new standard of oil-free compressors starts.
New ALE’s performance is evaluated by specific power consumption as per JIS B 8341:2008 (1801217 Edition3 equivalent ). KOBELCO places an importance on not only shaft power but also compressor’s total input power including energy loss in the compressor because electricity consumption for customers is not shaft power and rated motor power but compressor’s total input power,
A new rotor profile has been designed using advanced analysis technology that KOBELCO has fostered in their long history since developing the first oil free screw compressor in Japan in 1956. KOBELCO has achieved class-leading specific energy consumption thanks to the new rotors which have been designed superior performance.
Internal piping design, high efficiency motors and fans contribute to snergy savings. Moreover, gas coolers’ optimization decreases the discharge temperature and downsizes auxiliary equipment such as dryers. This leads energy saving of not only compressors but also clean air systems.
Stable pressure control of Inverter model keeps the line pressure lower. And the pressure fluctuation is kept within 0.01MPa. Energy saving logic of Fixed speed model forcibly switch loading to unloading at every capacity control cycle (min 23sec). Excessive pressure rise is eliminated and energy loss is minimized.
Plate fin gas cooler (water cooled)
80% of pressure drop has been cut compared with shell & tube type. Additionally, because discharge air temperature has been reduced by optimization of cooler size, auxiliary equipments are downsized.
KOBELCO Patented Expansion & Porous Silencer reduces noise level in broad frequency band.
*Expansion Silencer for 200kW and above
Capacity control valve
Proven pneumatic capacity control valve having quick response and high durability. Maintenance parts have been reduced thanks to built-in blow-off silencer.
Oil pump attached to gear box is driven by a high
efficiency main motor.
The risk of oil leakage is reduced by no-piping design.