... 1. Low noise, due to the helical suction and discharge, the blower air flow in and out according to the direction of spiral line, all ... no vibration.3. Long life. The blower bearing what we used are all double-row and Self-aligning bearing.4. High ... ZYSR series roots blower applicationsZYSR series roots blower widely used in electricity,petroleum,steel industry,smelling,food,oxygen making,spinning, ...