Flowserve DMX - Manual (Page 9)

DMX/DMXD/DMXH/DMXDH USER INSTRUCTIONS ENGLISH 85392728 - 10/09
Page 9 of 60
Brake Horse Power at Best Efficiency
Point.
dBA
3 to 14 Stages
90 to 110 79
110 to 140 80
140 to 180 81
180 to 220 82
220 to 280 83
280 to 360 84
360 to 450 85
450 to 560 86
560 to 720 87
720 to 900 88
900 to 1125 89
1125 to 1400 90
1400 to 1800 91
1800 to 2250 92
2250 to 2800 93
2800 to 3600 94
3600 to 4500 95
4500 to 5700 96
5700 to 7200 97
7200 to 9000 98
9000 to 11,000 99
11,000 to 14,000 100
1.9.3
Combined noise levels for pump and
driver components
When two or more sources produce noises that are
sufficiently unrelated (so that interference effects do
not occur) the total combined noise level may be
obtained by a simple addition of dB values according
to the below table.
Difference between two
levels to be Combined, dB Add to higher level to
obtain Combined level, dB
0 3
1 2.5
2 2
4 1.5
6 1
9 0.5
10 0