A blower is a rotary, positive displacement type of machine used to move gas and air and is used in a variety of methods. Blowers provide low pressure air for aeration, drying, gas extraction, pneumatic conveying and combustion in industrial, municipal and bulk hauling applications.

Blowers are available in several technologies: radial, side channel, liquid ring, oil lubricated and dry running rotary vane, rotary lobe, claw and screw.