71
ENG
•
W: options (W = only motor and pump, B =
motor, pump and motor base with adjusta-
ble feet, S = motor, pump, motor base with
adjustable feet and shroud, F = Frame with-
out adjustable feet, T = Trolley, U = Trolley +
shroud, G = Portable, M = Base plate with
adjustable legs with rubber pad, N = Shroud
and base plate with adjustable legs with rubber
pad, H = Stainless steel pedestal hydraulic
motor, P = On cast iron pedestal, Q = On cast
iron pedestal with base and motor, R = Cast
iron pedestal with base, motor and shroud).
An X in the code indicates a special execution.
Also shown on the nameplate are the year and
week of production, the weight and the duty point
of the pump, together with the serial number
which should be quoted when ordering spare
parts.
1.5.
Noise level
The noise generated by a pump depends on dif-
ferent factors. Most important are: power, speed
and brand name of the motor, whether there is
cavitation or not, operating point of the pump,
and handling of small quantities of air. In cer-
tain installations and duty points the noise level
mentioned below can be exceeded. To reduce
the noise and the vibrations, no other parts of
the machine can vibrate simultaneously with the
pump. That’s why it is best to let the pump rest
directly on the concrete, or to assemble shock
absorbers between the pump and the machine
frame. The maximum sound pressure level for
pumps with two-pole motors in normal circum-
stances on 50 Hz is:
Motor power P < 11kW 11kW < P
< 22kW
22kW < P
< 45kW
45kW < P
< 250kW
FP – NP – ICP – PHP – MCP – MFP – MWP
– FMS – NMS – VDK – VPC – FPP - IPP
80 dB(A) 88 dB(A) 90 dB(A) 94 dB(A)
CRP – IRP – PRP – IFF – MFF – MSP – AX 85 dB(A) 88 dB(A)
For other speeds the above mentioned values have to be corrected as follows:
Two-pole 60Hz +4 dB(A)
Four-pole 50Hz -10 dB(A)
Four-pole 60Hz -8 dB(A)
Six-pole 50Hz -15 dB(A)
Six-pole 60Hz -13 dB(A)
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