... ZYSR series roots blower widely used in electricity,petroleum,steel industry,smelling,food,oxygen making,spinning,etc. ZYSR series Three Lobes ... vibration.3. Long life. The blower bearing what we used are all double-row and Self-aligning bearing.4. ... series roots blower widely used in electricity,petroleum,steel industry,smelling,food,oxygen making,spinning,paper making,aquaculture,sewage ...