1
System
prioritization
regulating
14 Conditioned air outlet NBC duct
valve
15 Conditioned
air
overtemperature
2
Bleed air metallic bent tube
rotary switch
3
Precooler
16 Conditioned air temperature sensor
4
Pressure regulating flow valve
17 Temperature control duct inlet duct
5
Bleed
air
inlet
overtemperature
18 Temperature control valve
rotary switch
19 Particle pipeline separator
6
Venturi air circulating duct
20 Particle
pipeline
separator
air
7
Bleed air inlet metallic bent tube
outlet duct
8
Refrigeration unit
21 Cooling air overboard plenum
8a
NBC heat exchanger
22 Conditioned air outlet seal
8b
Air cycle machine
23 NBC filter inlet seal scavenge tube
8c
Jet pump nozzle
24 NBC filter support assembly
8d
Low limit temperature sensor
25 NBC filters
8e
Cooling air discharge plenum
26 Filtered air duct
8f
Water spray nozzle
27 Filter differential pressure switch
8g
Jet pump housing
28 Differential pressure switch and
9
Water extractor
tube
10
Anti-ice NBC inlet duct
29 Compartment differential pressure
11
Tubeaxial fan inlet duct
switch
12
Recirculating air mixing duct
30 Temperature air controller
13
Front anti-ice valve
31 Dump valve
32 Tube assemblies
Figure 1-1.
M1A1 Series Tank Main NBC System.
The four crew outlets receive approximately
18 cfm of
filtered air for their protective masks and
air cooled
vests.
The crew compartment bulk dump receives approximately 128
cfm of filtered air to create a positive pressure in the
crew compartment. The positive pressure keeps contaminated
air out and forces the smoke produced from firing the main
or coax guns out.
3
OD1705
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