This is an advanced design of Tri Lobe Roots Blower which is also called as rotary lobe compressor and rotary piston blower. Basic concepts present in a Twin Lobe Rotary Compressor are modified. The configuration of Rotor is changed to Tri Lobe. This profile enables the rotor pair to entrap and sweep the volume of air/gas 6 times in a revolution. Effectively it delivers higher capacity with smooth flow. The rugged design of Tri Lobe Rotary Compressor with higher rigidity makes it possible to run these machines at higher speed with acceptable vibration level. The roots compressor range covers 5 models from 1000 M3/Hr to 18000 M3/Hr. These are air cooled models.