... . Compact structure, elegant appearance, high stability, convenient installation and maintenance 2. Smooth operation3. Low noise4. Oil-free Blower5. Impeller is featured ... be adjusted7. Inlet rings are equipped for impeller of every stage, and labyrinth seals are set between stages and at the ... m3/min2. Discharge pressure: 1000-10000mmH2O3. Vacuum: -800--5000 mmH2O Multi-stage centrifugal blower