TM 5-4310-387-14
Table 2-2. SCUBA Cylinder Charging Capacities.
Air Capacity
Outside
Open-Circuit
Internal
at Rated
Reserve
Dimensions
Cylinder
Rated Working
Volume
Pressure
Pressure2
inches
Description
Pressure (psig)
(cu ft)
(cu ft)
(psig)
(dia.) (length)
Steel 72
2250
0.422
65.0
500
6.80 25.00
Aluminum 50
3000
0.281
48.5
500
6.8 19.00
Aluminum 63
3000
0.319
65.5
500
7.2 21.75
Aluminum 80
3000
0.392
80.4
500
7.2 26.00
Aluminum 90
3000
0.398
81.6
500
7.7 26.50
Aluminum 92
3200
0.434
95.0
500
8.0 24.75
Aluminum 100
3300
0.467
105.3
500
8.0 26.20
1
Numerals refer to approximate air capacity in cubic feet at rated working pressure. Fifty cubic feet is the
minimum size SCUBA cylinder authorized.
2
Single cylinder equivalent. Acceptable reserve actuation pressure ranges are:
a.
Single cylinder minimum of 450 psig.
b.
Double cylinder minimum of 225 psig.
NOTE
Before use, the reserve valve knob should be in the up position.
(10) Open the vent valve (8) to relieve pressure.
(11) Loosen screw handle (5) and remove filler adapter (3).
(12) If more cylinders are to be refilled, repeat steps 3 through 11.
(13) Install duct cap in filler adapter (3) and tighten.
(14) Shut down compressor (para. d.).
d.
Compressor Shutdown Procedures. (figure 2-7)
(1) Push the speed control lever (1) down to IDLE position.
(2) Vent the unit, by means of the bleed valve (2) on the filler adapter (3), until the pressure is reduced to
approximately 700 PSI. Close bleed valve (2).
2-16
