| |
Blast System Air Volume Estimates
| Nozzle |
Size of
Orifice |
Volume
of Air |
Plus
Helmet |
Plus 50%
(reserve) |
Minimum Air
Required |
| No. 4 |
1/4"
6.5mm |
81
2.3 |
20
0.5 |
50
1.4 |
151 cfm
4.2 m3/min |
| No. 5 |
5/16"
8.0mm |
137
3.9 |
20
0.5 |
79
2.2 |
236 cfm
6.6m3/min |
| No.6 |
3/8"
9.5mm |
196
5.5 |
20
0.5 |
108
3.0 |
324 cfm
9.0 m3/min |
| No. 7 |
7/16"
11.0mm |
254
7.2 |
20
0.5 |
137
3.9 |
411 cfm
11.6 m3/min |
| No. 8 |
1/2"
12.5mm |
338
9.6 |
20
0.5 |
179
5.0 |
537 cfm
16.1 m3/min |
|
