... noise pump 2. energy conserving 3. long life blower 4.high volume pump 5.stable performance, high ... due to the helical suction and discharge, the blower air flow in and out according to the ... efficiency, so it is energy-saving. The blower rotor adopted the advanced Composite curve, the meshing ... increases the volume efficiency.3. Stable performance. The blower rotor, casing, wall panels, shaft and other ...