Grundfos NB 80-200/222VAXEF1BESBQQEWX2, Инструкция по установке и эксплуатации

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5.4 Foundation of NB, NBG pump with base
frame
This section applies only to 50 Hz pumps
as base frames are not supplied for 60 Hz
pumps.
Non-compliance may result in functional
faults which will damage the pump
components.
Observe the following requirements when preparing
the foundation:
•
We recommend that you install the pump on a
plane and rigid concrete foundation which is
heavy enough to provide permanent support for
the entire pump.
• The foundation must be capable of absorbing any
vibration, normal strain or shock.
• Optimally, the weight of the concrete foundation
should at least be 1.5 times the weight of the
pump.
• The foundation must be 100 mm larger than the
base frame on all four sides. See the figure below.
Lf
h
f
Lf
B
f
X
X
X
X
TM051558
Foundation, X equal to minimum 100 mm
• The minimum height of the foundation, h
f
, can
then be calculated with the following formula:
hf =
m
pump × 1.5
Lf × Bf × δ
concrete
h
f
Height of the foundation [m]
L
f
Length of the foundation [m]
B
f
Width of the foundation [m]
m
pump
Mass of the pump [kg]
δ
concrete
Density of the concrete [kg/m
3
]
The density, δ, of concrete is usually taken
as 2,200 kg/m
3
.
• Place the pump on the foundation, and fasten it.
The base frame must be supported under its
entire area. See the figures below.
TM051559
Correct foundation
TM051560
Incorrect foundation
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English (GB)