ERPN-M USER INSTRUCTIONS ENGLISH 02-08
Page 11 of 37
Power BHP
Power K w.
dB(A) Value
63
125
250
500
1K
2K
4K
8K
3
2.2
67
54
58
58
56
56
56
54
59
3.7
2.7
68
58
62
62
60
60
60
58
53
4.7
3.5
69
59
63
63
61
61
61
59
54
6
4.4
70
64
64
62
62
60
55
50
50
7.6
5.6
71
61
65
65
63
63
63
61
56
9.4
6.9
72
62
66
66
64
64
64
62
57
12
8.8
73
67
67
65
65
63
58
53
53
15
11.0
74
68
68
66
66
64
59
54
54
19
14.0
75
69
69
67
67
65
60
55
55
24
17.6
76
70
70
68
68
66
61
56
56
31
22.8
77
67
71
71
69
69
69
67
62
39
28.7
78
68
72
72
70
70
70
68
63
49
36.0
79
69
73
73
71
71
71
69
64
62
45.6
80
70
74
74
72
72
72
70
65
77
56.6
81
71
75
75
73
73
73
71
66
95
69.9
82
75
75
73
73
71
66
61
61
115
84.6
83
77
77
75
75
73
68
63
63
145
106.6
84
78
78
76
76
74
69
64
64
190
139.7
85
79
79
77
77
75
70
65
65
250
183.8
86
80
80
78
78
76
71
66
66
350
257.4
87
81
81
79
79
77
72
67
67
500
367.6
88
78
82
82
80
80
80
78
73
700
514.7
89
79
83
83
81
81
81
79
74
940
691.2
90
80
84
84
82
82
82
80
75
1100
808.8
91
81
85
85
83
83
83
81
76
Sound pressure readings are for information only and are not subject to guarantee by Flowserv e.
Decibel readings do not include driv er or sy stem nois e.
Pump tested at 100% of the bes t effic iency point at max.impeller diameter with water.
dB correction for combining noises (pump+mo tor)
Differen ce between two
levels to be comb ined, dB
Add to the hig her level to obtain
the combin ed noise leve l,dB
Note :
1) The values sh owed ar e mea sure d a t a distance of 1 mt. (horizontally) from major pump
surfa ces and 1.5 mt. abo ve the floor .
2) The values sh own are expressed in dB.
3) For Noise Test Pro ce dure refer to Works Standar d L -109-0
4) The values sh own have been de rive d from actua l no ise -test da ta and are ba se d on the fo llowin g con ditions:
-
Equ ipment is loca ted in a fre e field abo ve a reflectin g pl ane in which the reductionin noise level
in all directions is 6db in each o ctave ba nd fo r ea ch dou bling of distance.
-
Backgroun d n oise is 10dB minimum b elow al l no ise levels in e ach octave ba nd.
-
The val ues shown are at a dista nce of 1 meter (horizontally) fr om the ma jor pump surface and
1,5 meters above the floor, usi ng a sta ndard pre ssure reference of 0,000 02 newton pe r squa re meter.
-
Overall noi se level, dB (A) is determine d a t points of maximum noise l evel an d the values o f all
mid-ban d freq uences ar e b asis A scale readi ngs.
Whe n the requi red con dition flow is outside the ra nge of 75 to 1 25% BEP, a part loa d corre ction (PLC) must be
ad ded to the noise level a s fo llows:
Percent o f BEP @ req uired
impeller diameter
PL C in
dB
74 to 6 2 or 12 6 to 136
+1
61 to 5 0 or 13 7 to 150
+2
+3
+4
37 to 2 5
1
0 .5
0
49 to 3 8
3
2.5
2
1.5
Octave MID_BAND Frequenc y, HZ
0
1
2
4
6
9
1 0
