9 noise level, 2 transport and storage, 1 consignment receipt and unpacking – Flowserve WMV IDP User Manual
Page 9: Receipt and unpacking (2.1), Sound pressure level (1.9, noise level)
WMV, WMVS USER INSTRUCTIONS ENGLISH 26999970 10-12
Page 9 of 28
flowserve.com
The operation of this water pump with variable duty
points may be more efficient and economic when
controlled by, for example, by the use of a variable
speed drive that matches the pump duty to the system.
Information on benchmark efficiency is available at;
1.9 Noise level
Attention must be given to the exposure of personnel
to the noise, and local legislation will define when
guidance to personnel on noise limitation is required,
and when noise exposure reduction is mandatory.
This is typically 80 to 85 dBA.
The usual approach is to control the exposure time to
the noise or to enclose the machine to reduce emitted
sound. You may have already specified a limiting
noise level when the equipment was ordered,
however if no noise requirements were defined, then
attention is drawn to the following table to give an
indication of equipment noise level so that you can
take the appropriate action in your plant.
Pump noise level is dependent on a number of
operational factors, flow rate, pipework design and
acoustic characteristics of the building, and so the
values given are subject to a 3 dBA tolerance and
cannot be guaranteed.
Similarly the motor noise assumed in the “pump and
motor” noise is that typically expected from standard
and high efficiency motors when on load directly driving
the pump. Note that a motor driven by an inverter may
show an increased noise at some speeds.
If a pump unit only has been purchased for fitting with
your own driver then the “pump only” noise levels in
the table should be combined with the level for the
driver obtained from the supplier. Consult Flowserve
or a noise specialist if assistance is required in
combining the values.
It is recommended that where exposure approaches
the prescribed limit, then site noise measurements
should be made.
The values are in sound pressure level L
pA
at 1 m
(3.3 ft) from t
he machine, for “free field conditions
over a reflecting plane”.
For estimating sound power level L
WA
(re 1 pW) then
add 14 dBA to the sound pressure value.
2 TRANSPORT AND STORAGE
2.1 Consignment receipt and unpacking
Immediately after receipt of the equipment it must be
checked against the delivery/shipping documents for its
completeness and that there has been no damage in
transportation. Any shortage and/or damage must be
reported immediately to Flowserve and must be
received in writing within one month of receipt of the
equipment. Later claims cannot be accepted.
Check any crate, boxes or wrappings for any
accessories or spare parts that may be packed
separately with the equipment or attached to side
walls of the box or equipment.
Motor size
and speed
kW (hp)
Typical sound pressure level L
pA
at 1 m reference 20 μPa, dBA
3 550 r/min
2 900 r/min
1 750 r/min
1 450 r/min
Pump
only
Pump and
motor
Pump
only
Pump and
motor
Pump
only
Pump and
motor
Pump
only
Pump and
motor
<0.55 (<0.75)
72
72
64
65
62
64
62
64
0.75 (1)
72
72
64
66
62
64
62
64
1.1 (1.5)
74
74
66
67
64
64
62
63
1.5 (2)
74
74
66
71
64
64
62
63
2.2 (3)
75
76
68
72
65
66
63
64
3 (4)
75
76
70
73
65
66
63
64
4 (5)
75
76
71
73
65
66
63
64
5.5 (7.5)
76
77
72
75
66
67
64
65
7.5 (10)
76
77
72
75
66
67
64
65
11 (15)
80
81
76
78
70
71
68
69
15 (20)
80
81
76
78
70
71
68
69
18.5 (25)
81
81
77
78
71
71
69
71
22 (30)
81
81
77
79
71
71
69
71
30 (40)
83
83
79
81
73
73
71
73
Note: for 1 180 and 960 r/min reduce 1 450 r/min values by 2 dBA. For 880 and 720 r/min reduce 1 450 r/min values by 3 dBA.