Advertisement
they are subject to a +3 dB tolerance, and cannot
be guaranteed.
The values are based on the noisiest ungeared
electric motors which are likely to be encountered.
They represent Sound Pressure Levels at 1 m
(3.3 ft) from the directly driven pump, for "free
field over a reflecting plane".
Typical sound pressure level,
dBA, L
at 1 m reference 20 Pa (L
pA
Motor size and speed
Pump and
motor
kW (hp)
<0.55 (<0.75)
0.75 (1)
1.1 (1.5)
1.5 (2)
2.2 (3)
3 (4)
4 (5)
5.5 (7.5)
90 (99)
7.5 (10)
90 (99)
11 (15)
91 (100)
15 (20)
92 (101)
18.5 (25)
92 (101)
22 (30)
92 (101)
30 (40)
100 (109)
37 (50)
100 (109)
45 (60)
100 (109)
55 (75)
100 (109)
75 (100)
100 (109)
90 (120)
100 (109)
110 (150)
100 (109)
150 (200)
101 (110)
In areas where the staff has to intervene, remem-
ber that when the level of the sound pressure is:
Below 70 dBA:
It is not necessary to take special precautions.
Above 70 dBA:
People working continuously in the machine room
must be supplied with protective devices against
noise.
Below 85 dBA :
No particular measures need to be taken for casual
visitors staying in the room during a limited period.
Above 85 dBA:
The room must be considered as a dangerous area
because of the noise and a warning sign must be
fixed at each entry warning the people coming
into the room, even for a short period, that they
must wear hearing protection.
Above 105 dBA:
Special hearing protection adapted to this noise
Installation and maintenance instructions Wilo-Horizontal pumps
sound power1 pW where L
wA
3550 r/min
2900 r/min
Pump
Pump and
only
motor
dBA
dBA
dBA
71
66
64
74
66
67
74
68
67
77
70
70
78
72
71
81
74
74
82
75
75
77
83
78
83
80
84
83
85 (94)
83
85 (94)
83
85 (94)
85 (94)
93 (102)
86 (95)
93 (102)
87 (96)
93 (102)
88 (97)
95 (104)
90 (99)
95 (104)
90 (99)
95 (104)
91 (100)
95 (104)
92 (101)
96 (105)
If a pump only has been purchased, for fitting with
your own driver, then the "pump only" noise levels
from the table should be combined with the level
for the driver obtained from the supplier. If the
motor is driven by an inverter, it may show an
increase in noise level at some speeds. Consult a
Noise Specialist for the combined calculation.
> 85 dBA)
pA
1750 r/min
Pump
Pump and
Pump
only
motor
only
dBA
dBA
dBA
62
64
62
62
67
62
64
67
64
66
70
66
68
71
68
70
74
70
71
75
71
73
76
73
74
77
74
76
78
76
79
80
79
79
80
79
79
81
79
81
84
80
82
84
80
83
84
80
84
86 (95)
81
86 (95)
88 (97)
81
86 (95)
90 (99)
81
87 (96)
91 (100)
83
88 (97)
91 (100)
83
level and to the spectral noise components must
be installed and a warning sign to this effect erec-
ted at each entry. The staff in the room must
wear ear protection.
Make sure that the noise, which travels through
the walls and windows, does not generate too
high noise levels in the machine room's surroun-
dings.
2 Transport and storage
2.1 Consignment receipt and unpacking
Immediately after receipt of the equipment it
must be checked against the delivery and shipping
documents for its completeness and that there
has been no damage in transportation.
Any shortage and or damage must be reported
immediately and received in writing within one
month of receipt of the equipment. Later claims
cannot be accepted.
Check any crate, boxes and wrappings for any
accessories or spare parts that may be packed
separately with the equipment or attached to
NPG
1450 r/min
Pump and
Pump
motor
only
dBA
dBA
63
62
63
62
65
64
66
66
68
68
70
70
71
71
72
71
73
72
74
73
76
75
76
75
77
75
80
76
80
76
80
76
82
77
83
78
85 (94)
78
86 (95)
79
86 (95)
79
English
Advertisement
Need help?
Do you have a question about the NPG Series and is the answer not in the manual?