English (GB)
15
8.3 Connection
Arrows on the pump housing show the direction of
flow of liquid through the pump.
The pumps can be installed with the motor/pump
shaft in all positions between vertical and horizontal,
but the motor must never fall below the horizontal
plane.
Horizontal motors with feet must always be
supported.
Fig. 11 Installation positions
It is advisable to fit isolating valves on either side of
the pump as this makes it unnecessary to drain the
system if the pump needs to be cleaned or repaired.
8.4 Foundation of NB, NBG pump without
base frame
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. As a rule of thumb,
the weight of the concrete foundation should be 1.5
times the weight of the pump. The concrete
foundation must have an absolutely level and even
surface.
Place the pump on the foundation, and fasten it. See
fig. 12.
Fig. 12 Foundation
The foundation length and width should always be
200 mm larger than the length and width of the
pump. See fig. 12.
The mass of the foundation must be at least 1.5
times the total mass of the pump. The minimum
height of the foundation (h
f
) can then be calculated:
The density () of concrete is usually taken as 2,200
kg/m
3
.
In installations where noise-less operation is
particularly important, a foundation with a mass up to
5 times that of the pump is recommended. See also
8.7 Vibration dampening on page 20.
TM03 4126 1706
The foundation/installation must be carried
out in accordance with the following
instructions. Non-compliance may result in
functional faults which will damage the
pump components!
0.25 - 37 kW
0.25 - 200 kW
TM03 4130 1706
h
f
=
m
pump
× 1.5
L
f
× B
f
×
concrete
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