Flowserve WUC Worthington User 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]