After installation is finished, tighten the screws connecting
the flange, feet and the anchor bolts according to the
tightening torques. You must apply an anti-loose method,
such as mounting lock washers.
5.4 Foundation of NB pump with base frame
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 4 inches (100 mm) larger than the base
frame on all four sides. See the figure below.
TM085814
Foundation, X equal to minimum 4 inches (100 mm) l
• The minimum height of the foundation, h
f
, can then be
calculated with the following formula:
h
f
=
m
pump
× 1.5
L
f
× B
f
× δ
concrete
h
f
Height of the foundation [in] ([m])
L
f
Length of the foundation [in] ([m])
B
f
Width of the foundation [in] ([m])
m
pump
Mass of the pump [lbs] ([kg])
δ
concrete
Density of the concrete [lb/in
3
] ([kg/m
3
])
The density of concrete, indicated by δ, is usually taken
as 0.08 lb/in
3
(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.
16
English (US)
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