Chapter 2
Cylinder and Components
Edition 1 – December 2019 SAFETY FIRST 25
MSA G1 Electronic Breathing Apparatus
Figure 13: pressure reducer
Mechanical low pressure warning whistle
The mechanical low-pressure warning whistle is located at the pressure reducer next to
the cylinder connection valve. It is an acoustic warning device (signal/whistle) that
triggers a continues 95 dB warning whistle.
Figure 14: mechanical low pressure warning whistle
The low pressure warning whistle is low pressure activated and low pressure operated
to trigger the continuous warning signal when the cylinder pressure drops below
55 +/- 5 bar.
Low
pressure
warning whistle
Cylinder
wheel
Medium
pressure line
Cylinder
connection
O
rings
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