GB
Form no.: L453147GB– revision 06/2013
8.
Technical data
8.1
Sound pressure and sound effect level
Measurements have been carried out in accordance with ISO 3743,
Grade 2 and ISO 3746, Grade 3. Tolerance: ±3 dB.
LpA in dB refers to the sound pressure level at a distance of one
metre from the surface of the pump at a height of 1.6 m above floor
level (cf. EC Directive (89/392/EEC).
LwA indicates the sound power level.
Operating conditions A, B and C are defined as follows:
a)
Nominal flow and max. permissible operating pressure
b)
Nominal flow and 60% operating pressure
c)
60% flow and max. permissible operating pressure
The nominal flow and max. permissible operating pressure in the
case of the W+55/60, for example, are 60 m³/hr at an operating
pressure of 5.5 bar, and so on.
This information only applies if the motor used is an ABB aluminium
motor and the size of the motor matches the power requirement of
the pump.
The noise level may increase considerably if reducers (reduction/
expansion fittings) are mounted on the inlet/outlet.
The values shown apply when the pumps operate at 2900 rpm and
there is a shroud over the motor. If the pumps operate at 1450 rpm,
the values are reduced by approx. 20 dB. The values for the
W+25/210 apply at 1450 rpm.
Operating
conditions
LpA
LwA
A
B
C
A
B
C
W+10/8
65
62
60
79
77
74
W+22/20
67
65
61
81
79
75
W+30/80
75
73
68
89
87
82
W+25/210
69
68
64
83
82
78
W+35/35
69
67
64
83
81
78
W+35/55
72
70
67
86
84
81
W+30/120
76
74
72
90
88
86
W+50/8
69
68
64
83
82
78
W+50/600
75
75
73
89
89
87
W+55/35
69
68
68
83
82
82
W+55/60
74
70
68
88
84
82
W+60/110
76
74
72
87
85
84
W+65/350
86
88
82
100
102
98
W+70/40
75
69
69
89
83
83
W+80/80
75
73
72
89
87
86
W+110/130
79
76
76
93
90
90
Please note that the sound emitted by a pump may vary
considerably. It depends on the pump design (size/speed/shroud/
installation) as well as on the liquid type and pumping conditions.
15
APV
