TM 55-1930-209-14&P-19
CHAPTER 7 COMPRESSED AIR SYSTEM PMCS
Section I. General system information
7-1 Introduction. Chapter 7 contains Preventive Maintenance Checks and Services for the Reverse Osmosis Water
Purification Unit Barges Compressed Air System. Operating and maintenance procedures for the compressed air system
are described in TM 55-1930-209-14&P-7. TM 55-1930-209-14&P-7, Appendix C also contains complete Preventive
Maintenance Checks and Services for the Compressed Air System.
7-2 Major components. Major components, their basic functions and location on the barges are listed in Table 7-1.
Table 7-1. Major Components of Compressed Air System
Component
Function
Location
Electric Controller
ROWPU space port
Starts, stops, and
bulkhead near compressor
provides automatic
compressor operation
Compressor w/Receiver
ROWPU space portside
Compresses air to 155
aft. Barge 1, Figure 7-1.
psi and stores it in an
Barge 2 and 3, Figure 7-2.
80 gallon receiver
Automatic Air Pressure
On top of receiver
Turns compressor on
Regulator (Pressure Switch)
and off to maintain
pressure in receiver
within factory set limits
Receiver Pressure Gauge
Mounted on side of
Indicates air pressure
receiver
in receiver :
Receiver Safety Valve
Mounted on top of
Relieves air pressure
receiver
in receiver when it
exceeds 175 psi
Receiver Drain Cock
Bottom of receiver
Provides opening to
relieve air pressure in
receiver. Drains moisture
from receiver.
Main Supply Valve
Forward end of receiver
Controls flow of
compressed air to air
supply lines. Isolates
receiver from lines.
Air Filter 1
In air supply pipe near
Removes particles and
compressor.
moisture from air pass-
ing from receiver to air
supply lines, Figure 7-3.
Air Filter 2
In air supply line
Removes oil and particles
immediately in front
from line to air station
of air station 6.
6 to preclude contami-
nation of drinking water
shore discharge hose,
Figure 7-3.
Change 1 7-1
