Greatech Silent Roots Blower (SdB serial)
Bore Size: 40 to 150 mm ( 1.5 to 6 inch)
Air Flow: 0.1 to 22 m3/min
Pressure: 0 to 0.6 Bar
As Vacuum Pump: 0 to –0.5 Bar

Advantage:
Tri. Lobe Roots Blower
Extremely low noise
Electric save at least 20%
Fully cooling including gear oil box
Gear oil only need to change once a year or even longer
Coupling driven, No need to change and adjust belt
Vertical design, space save 50%
High efficiency
Extremely low vibration, almost no shaking