The GTS104 family of Geared Twin Screw compressor utilize a common platform, 104mm diamater drive rotor. The family included six displacements fron 123cfm to 300cfm at a 50/60Hz drive frequency. Nominal capacities range from 33 to 70 tons with refrigerant R-134a at flooded chiller operating conditions. Optimized models are available for air cooled and water colded condensers, as well as for economized and non-economized applications. All models are identical externally.