... noise, long lifespan, high efficient roots blower 2 widely used for water treatment, chemical factory, power generation JINAN HUADONG BLOWER CO., LTDHDRR ... and all kinds of neutral gasAccessory: suction silence (with air filter). Discharge silence, safety valve, pressure gauge, cock, vibration-isolating base ... at sightDelivery time: within two weeks twin lobe roots blower for water treatment aerator