Patent ID: 7871239

Claim:
A casing assembly for a compressor, comprising: an inlet body segment having a fluid inlet; an outlet body segment having a fluid outlet; and intermediate body segments each having an inner circumferential surface, wherein a selected number of the intermediate body segments are disposed between the inlet and outlet body segments, each of the selected number of intermediate body segments being connected with at least one of the inlet body segment, the outlet body segment and another one of the intermediate body segments to form a compressor casing, the inner circumferential surface of each of the selected number of intermediate body sections defining an interior chamber section, the interior chamber sections of the selected number of intermediate body segments collectively defining at least a portion of a compressor chamber sized to receive a first internal compression assembly including a first number of compressor stages and to alternatively receive a second internal compression assembly having a second number of compressor stages, the second number being different than the first number, wherein at least one first compressor stage of the first internal compression assembly has a first axial length and at least two second compressor stages of the second internal compression assembly have a second axial length, the second axial length being less than the first axial length.