roots blower 1.provide oxygen clean air delivey 2.purify water and air and other pollutant 3.industrial effluent treatment We can packed ... cover,Blower Pulley,Motor Pulley,V-belt,Inlet Silencer(with air filter),Safety Valve,Pressure Gauge,Lubricating Oil,Anchor Bolt,flexible ... pressure o High efficiency due to special impeller design, great air-delivery low power o Simpler and solider structure, less ...