English (GB)
12
6.2 Foundation
We recommend that you install the fire pump set on a concrete
foundation which is heavy enough to provide permanent and rigid
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 fire pump set. The concrete
foundation must have an absolutely level and even surface. In the
foundation, install appropriate anchorage dowels to fasten the fire
pump set.
Figure 7 shows how to construct the foundation of the fire pump
set. When setting up the foundation, make sure that the
foundation is 100 mm (dimension x) larger in length and width
than the dimensions of the base frame.
Fig. 7
Foundation dimensions
The minimum height of the foundation (h
f
) can be calculated as
follows, if the mass of the foundation is assumed to be 1.5 times
the total mass of the fire pump set:
The density (
ρ
) of the foundation is usually taken as 2,200 kg/m
3
.
In installations where noiseless operation is particularly
important, we recommend that you use a foundation with a mass
of up to five times that of the fire pump set. The minimum height
of the foundation (h
f
) can then be calculated:
As ordinary concrete does not set shrink-freely, the resulting gap
must be grouted with a suitable, shrink-free hardening and high-
strength or reinforced undercast (i.e. Pagel V1 or Eurogrout
Premium) to have a force-fit connection between the base frame
and the foundation. Before grouting the undercast, align the
pump set by means of the adjusting screws used for the base
frame. See fig. 8.
Fig. 8
Aligning the pump set
For grouting the undercast, make a shuttering on the raw
foundation. Mix the grouting compound according to
manufacturer instructions and pour it into the shuttering.
Wait until the specified hardening time has past before fixing the
pump set on the foundation by means of anchor bolts.
Anchor bolts are available as an accessory (P/N 97947677).
Note
The instructions in this section are
recommendations. The plant and machinery
installer is responsible for making a correct
foundation.
TM
06 06
52 431
4
h
f
=
m
system
x 1.5
L
f
x B
f
x
ρ
concrete
h
f
=
m
system
x 5
L
f
x B
f
x
ρ
concrete
h
f
B
f
Lf
x
x
T
M
05
25
47
02
1
2
Caution
Do not use an installation on stud bolts in
connection with additional grouting of concrete.
The reason is that the volume of the concrete
shrinks resulting in a gap between base frame
and concrete. The gap will persist even if the
pump set is fixed by means of stud bolts later on.
This will lead to increased vibrations during
operation.
Undercast.
Height as required
or as specified by
the manufacturer.
Anchor bolt
Rough foundation.
Determine the height at site.
Foot
Adjusting screw
Min.
130
Min. 130
Base frame
Summary of Contents for Fire NKF Series
Page 2: ...2 ...
