SELF-CONTAINED BREATHING APPARATUS (CTS-IB-PPE-01)
©Chlorine Tech Services (Pty) Ltd
–
CIPC Reg # 2018/101848/07
Rev # 01/2020/10/15
P a g e
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2.3.
Air Consumption
Approximate consumption by a person is as follows:
Degrees of work Air consumption
(litres/minute)
Duration of cylinder in
minutes (1200 litres
capacity in minutes)
Duration of cylinder in
minutes (1800 litres
capacity in minutes)
Resting
8-12
150-100
225-150
Light Work
12-20
100-60
150-90
Moderate Work
20-40
60-30
90-45
Heavy Work
40-60
30-20
45-30
Nominal Working Duration =
(Fully Charge Cylinder Capacity)
– 10
40
We subtract 10 as 10 minutes is when the alarm starts ringing and it is a safe
period which must be taken into account. So, a 1200 litres cylinder will last for
1200/40 = 30 minutes minus the 10 = 20 minutes.
Nervousness and excitement can cause an increased demand of oxygen and a
proportionate increase of respiration rate.
2.4.
Basic Unit
– Backplate, pneumatic system without second connector
8
6
7
10
9
11
0
1
2
3
4
14
0
12
0
13
0
15
3
5
Fig. 2
