... pump 5.stable performance, high efficiency 1. Low noise, due to the helical suction and discharge, the blower air flow in and out ... noise of our blowers are further reduced. 2. High volume and anti-heat efficiency, so it is energy-saving. The blower rotor ... , the meshing is more reasonable, and further increases the volume efficiency.3. Stable performance. The blower rotor, casing, wall panels, shaft ...