Centrifugal compressors are made up of a casing with stationary internals, containing a rotating element, or rotor, supported by bearings. Shaft end-seals are provided to contain the process gas. Figure 200-30 shows a typical multistage compressor and identifies the basic components. (Refer to Figure 200-1 for details of the gas flow path.
The main machine components are:
• Casings
• Nozzles
• Stage
• Diaphragms
• Impellers
• Rotor
• Shaft
• Radial Bearings
• Thrust Bearing
• Balance Piston
• Interstage Seals
• Shaft-end Seals
