... noise high pressure roots blower 2.energy conserving 3.long service life,high volume 4.stable performance Specification1. Low noise, ... (0.7-0.9kgf/cm2), which makes the product quality more liable.7. The transported air is clean and without ... bearing.10. Widely used in many fields, especially in gas transportation, waste water treatment, aquaculture, pneumatic transport, vacuum packing, oxygen ...