Selecting the right single-shaft compressor requires matching process needs, site constraints, and maintenance strategy. Key considerations include required pressure and flow, duty cycles, part-load behavior, and accessibility.
When to choose vertically split casing
Best for compact, multi-stage installations where horizontal removal of the rotor assembly is preferred. Vertical split casings allow multiple process stages inside one casing and horizontal pull-out of the internals for major overhaul without disconnecting process piping—ideal when floor space is limited but lateral extraction is feasible and full-overhaul access is occasionally required.
When to choose horizontally split casing
Preferred for installations requiring independent per-stage designs (through-flow, back-to-back, split-flow), frequent inspections, or easy routine maintenance. Horizontal split casings permit opening the casing for inspection without moving the baseplate or separating piping, and they accommodate side-streams and interstage cooling while simplifying part-load efficiency optimization via inlet guide vanes.
Additional guidance
The appropriate compressor configuration depends on the process duty, maintenance requirements and site constraints. Vertical arrangements may suit compact, overhaul-oriented layouts, while horizontally split configurations can provide greater flexibility for routine access and multi-configuration processes.
During centrifugal compressor sizing, consider gas composition, operating temperatures, flow, pressure requirements and expected operating range together with site logistics. QualRotate's applications engineers can then help evaluate the appropriate model, stage arrangement and control options for your project.
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