Air equipments company, an iso 9001-2000 company manufactures twin/tri lobe rotary compressors [roots blower]. The company supplies these rotary compressors with varied range of capacity including 20 m3/hr. To 20000 m3/hr at pressure differential varying from 100 mbar to 1000 mbar [maximum]. The twin/tri lobe rotary compressors work on positive displacement principle with constant volume characteristics. Some of the salient features of these rotary compressors are dynamically balanced rotary parts to ensure smooth and vibration free running; ruggedly built for continuous duty; and helical gears to ensure high load carrying capacity. The twin/tri lobe rotary compressors are useful for pressure and/or vacuum applications. Twin/tri lobe rotary compressors are the perfect choice for aeration and agitation in effluent treatment plants, water treatment plants, electroplating tank, storage silos etc as well as pneumatic conveying systems. These rotary compressors are also used for packing industry, vacuum moulding, blending, central vacuum cleaning, drying, combustion and many others. The twin/tri lobe rotary compressors find application in pharmaceutical, chemical, cement, metallurgical, food processing, fertilizer, mining, power plants, road construction plants etc sectors.