Figure 11-4.W-type, two-stage, three-cylinder
Figure 11-5.Differential piston with a two-stage,
Figure 11-7.-Twin-lobe rotary compressor.
You should always use maintenance and
service literature provided by manufacturers
when you are working with rotary compressors.
Maintenance information is given in Operation
and Maintenance of Compressed Air Plants,
Figure 11-6.Compression cycle of rotary compressor.