CHAPTER 6
COMPRESSED AIR SYSTEMS
In the EN3 TRAMAN, we learned about the types
required to supply air of adequate volume, quality, and
of air compressors that an Engineman is required to
pressure at the various points of applications. This
operate. We also learned how the air is compressed; the
supply of air is measured as pounds per square inch
requirements and methods of providing oil-free air; how
gauge (psig). Air compressor plants or systems are
moisture is removed from the air; and some of the safety
classified as low-pressure (0 to 150 psig),
precautions used when operating or working with
medium-pressure (151 to 1,000 psig), or high-pressure
compressed air systems.
(1,000 psig and above).
This chapter contains general information about
maintenance and repair of compressed air systems. You
should refer to the appropriate manufacturer’s technical
manuals, maintenance requirements (3-M), and various
information books for more specific information. Naval
Ships’ Technical Manual, Chapter 551, “Compressed
Air Plants and Systems,” is one good source of
information.
Aboard Navy vessels, the A division or repair
division is responsible for maintenance and repair of
compressed air systems.
LOW-PRESSURE SYSTEMS
AIR SYSTEMS
Compressed air is a form of power that has many
important uses. An air compressor plant (fig. 6-1) is
Low-pressure (LP) systems provide compressed air
up to 150 psig pressure. For branches requiring lower
pressures, pressure is usually reduced at reducing
stations. The following list contains examples of air
pressure requirements for LP air:
Figure 6-1.—Typical components of a compressed air system.
6-1
