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
22
English (GB)
Summary of Contents for NB 80-200/222VAXEF1BESBQQEWX2
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