Replacing Air Cylinders - 3M SCOTT AIR-PAK X3 PRO Operating & Maintenance Instructions

Replacing Air Cylinders

Replace depleted or partially depleted SCBA cylinders with full cylinders as soon as possible. To change the cylinder,
remove the respirator assembly and place it on a solid support.
The Air-Pak X3 Pro comes with either a CGA threaded hose coupling or a Snap-Change cylinder coupling (see
Figure 3-14).
Cylinder valve with Snap-Change attachment
Use only cylinders with the correct rated pressure for the respirator.
•
SCBAs rated for 2216 psig service (pressure 2.2) must use only cylinder and valve assemblies marked for 2216
psig service (30-minute rated only)
•
SCBAs rated for 4500 psig service (pressure 4.5) must use only cylinder and valve assemblies marked for 4500
psig service (30-minute, 45-minute, or 60-minute rated)
•
SCBAs rated for 5500 psig service (pressure 5.5) must use only cylinder and valve assemblies marked for 5500
psig service (30-minute, 45-minute, 60-minute, or 75-minute rated)
Always inspect the cylinder valve assembly before connecting the pressure reducer hose coupling.
To prepare for cylinder replacement
1 Leave the area requiring respiratory protection and be certain that respiratory protection is no longer required.
Doff the facepiece. (See
2 Push in and rotate the cylinder valve knob clockwise and completely close the cylinder valve. Release residual air
pressure in the respirator system by opening the purge valve slightly. When the flow of air from the facepiece
stops, close the purge valve fully.
NOTE
Always close the cylinder valve on empty cylinders. An open valve may allow moisture or other contaminants
to enter the cylinder.
Do not use tools to close the cylinder valve. Over-tightening the cylinder valve may cause damage that could
result in leakage of air from the cylinder.
3 Release the waist pad, loosen the backframe harness, and remove the respirator. Place the respirator on a solid
support with the cylinder facing up.
P/N 595373-01 Rev C
Figure 3-14 Snap-Change and CGA coupling.
"Shutting Off the Respirator" on page 25.)
202004
REPLACING AIR CYLINDERS
Cylinder valve with CGA attachment
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