Flowserve ERPN-M User Instructions page 11

Power BHP Power K w.
3 2.2
3.7 2.7
4.7 3.5
6 4.4
7.6 5.6
9.4 6.9
12 8.8
15 11.0
19 14.0
24 17.6
31 22.8
39 28.7
49 36.0
62 45.6
77 56.6
95 69.9
115 84.6
145 106.6
190 139.7
250 183.8
350 257.4
500 367.6
700 514.7
940 691.2
1100 808.8
Sound pressure readings are for information only and are not subject to guarantee by Flowserve.
Decibel readings do not include driv er or system nois e.
Pump tested at 100% of the bes t efficiency 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
74 to 6 2 or 12 6 to 136
61 to 5 0 or 13 7 to 150
49 to 3 8
37 to 2 5
dB(A) Value 63 125
67 54 58
68 58 62
69 59 63
70 64 64
71 61 65
72 62 66
73 67 67
74 68 68
75 69 69
76 70 70
77 67 71
78 68 72
79 69 73
80 70 74
81 71 75
82 75 75
83 77 77
84 78 78
85 79 79
86 80 80
87 81 81
88 78 82
89 79 83
90 80 84
91 81 85
0
3
PL C in
dB
+1
+2
+3
+4
Page 11 of 37
ERPN-M USER INSTRUCTIONS ENGLISH 02-08
Octave MID_BAND Frequenc y, HZ
250 500 1K
58 56 56
62 60 60
63 61 61
62 62 60
65 63 63
66 64 64
65 65 63
66 66 64
67 67 65
68 68 66
71 69 69
72 70 70
73 71 71
74 72 72
75 73 73
73 73 71
75 75 73
76 76 74
77 77 75
78 78 76
79 79 77
82 80 80
83 81 81
84 82 82
85 83 83
1 2 4
2.5 2 1.5
2K 4K 8K
56 54 59
60 58 53
61 59 54
55 50 50
63 61 56
64 62 57
58 53 53
59 54 54
60 55 55
61 56 56
69 67 62
70 68 63
71 69 64
72 70 65
73 71 66
66 61 61
68 63 63
69 64 64
70 65 65
71 66 66
72 67 67
80 78 73
81 79 74
82 80 75
83 81 76
6 9 1 0
1 0 .5 0