Flowserve WUC Worthington - Manual (Page 10)

WUC USER INSTRUCTIONS ENGLISH - 07/14
Page 10 of 52
dB(A) Value 63 125 250 500 1 K 2 K 4 K 8 K
57 48 52 52 50 50 50 48 43
59 50 54 54 52 52 52 50 45
61 52 56 56 54 54 54 52 47
63 54 58 58 56 56 56 54 49
70 60 64 64 62 62 62 60 55
64 54 58 58 56 56 56 54 49
72 62 66 66 64 64 64 62 57
64 54 58 58 56 56 56 54 49
72 62 66 66 64 64 64 62 57
66 56 60 60 58 58 58 56 51
74 64 68 68 66 66 66 64 59
67 57 61 61 59 59 59 57 52
73 63 67 67 65 65 65 63 58
68 58 62 62 60 60 60 58 53
69 59 63 63 61 61 61 59 54
74 64 68 68 66 66 66 64 59
69 59 63 63 61 61 61 59 54
70 60 64 64 62 62 62 60 55
70 60 64 64 62 62 62 60 55
71 61 65 65 63 63 63 61 56
71 61 65 65 63 63 63 61 56
72 62 66 66 64 64 64 62 57
73 63 67 67 65 65 65 63 59
74 64 68 68 66 66 66 64 60
Sound pressure readings are for information only and are not subject to guarantee by Flowserve/IDP.
Decibel readings do not include driver or system noise.
Pum p tested at 100% of the best efficiency point at max.impeller diameter with water.
dB correction for combining noises (pump+motor)
Add to the higher level to obtain
the combined noise level,dB
Note :
1) The values showed are measured at a distance of 1 mt. (horizontally) from major pump
surfaces and 1.5 mt. above the floor.
2) The values shown are expressed in dB (A)
3) For Noise Test Procedure refer to Works Standard L-109
4) The values shown have been derived from actual noise-test data and are based on the following conditions:
- Equipm ent is located in a free field above a reflecting plane in which the reductionin noise level
in all directions is 6db in each octave band for each doubling of distance.
- Background noise is 10dB minimum below all noise levels in each octave band.
- The values shown are at a distance of 1 meter (horizontally) from the major pump surface and
1,5 meters above the floor, using a standard pressure reference of 0,00002 newton per square meter.
- Overall noise level, dB(A) is determ ined at points of m aximum noise level and the values of all
mid-band frequences are basis A scale readings.
When the required condition flow is outside the range of 75 to 125% BEP, a part load correction (PLC) must be
added to the noise level as follows:
Percent of BEP @
required impeller
diameter
PLC in
dB
74 to 62 or 126 to 136 +1
61 to 50 or 137 to 150 +2
49 to 38 +3
37 to 25 +4
1500 rpm
1800 rpm
Motorstand 0
1450 rpm
Motorstand 8
Motorstand 7
1500 rpm
1800 rpm
1800 rpm
Motorstand 6
1500 rpm
1800 rpm
3000 rpm
1500 rpm
1800 rpm
Motorstand 4
Motorstand 1
3000 rpm
1500 rpm
3600 rpm
1800 rpm
Motorstand 3
3000 rpm
1500 rpm
1 0.5 0 3 2.5 2 1.5
6 9 10
3600 rpm
levels to be com bined, dB
Difference between two
3000 rpm
1500 rpm
Motorstand 5
1800 rpm
0 1 2 4
1760 rpm
2900 rpm
3600 rpm
Octave MID BAND frequency [Hz]