English (GB)
10
3.1.6 Dry installation
Install pumps in dry installation permanently in a pump room.
The pump motor is enclosed and watertight and will not be
damaged if the installation site is flooded with water.
1. Mark and drill mounting holes in the concrete foundation.
2. Fit the base plate or base stand on the concrete with anchor
bolts. Check the pull-out strengths required for bolts at the
end of this section.
3. Check that the base plate or base stand is horizontal or
vertical.
4. Fasten the pump to the base plate or base stand.
In order to facilitate service on the pump, we recommend that you
fit isolating valves on either side of the pump.
5. Fit the inlet and outlet pipes and isolating valves, if used, and
ensure that the pump is not stressed by the pipes.
6. Adjust the length of the motor cables by coiling them up on a
relief fitting to ensure that the cables are not damaged during
operation, but remember to have enough cable length to be
able to service the pump. Fasten the relief fitting to a suitable
hook. Make sure that the cables are not sharply bent or
pinched.
7. Connect the motor cables and the control cable, if any.
The inlet and outlet pipes are bolted to the pump by means of
flange connections.
Foundation
To ensure minimum vibration levels, all parts of the system must
be sufficiently stiff and firmly anchored:
• The foundation and concrete must be of adequate strength to
support the weight of the pump including accessories, the
weight of the liquid passing through the pump and the forces
generated by the pump.
• As a rule of thumb, the mass of the concrete foundation must
be minimum three to five times the mass of the supported
equipment and must have sufficient rigidity to withstand the
axial, transverse and torsional loads generated by these
machines.
• The foundation must be 15 cm wider than the base plate for
pumps up to 350 kW and 25 cm wider for larger pumps.
• The concrete used in the foundation must have a minimum
tensile strength of 250 N/cm
2
.
• Always use epoxy grout to fasten the pump base plate to the
foundation.
Pull-out strengths for anchor bolts
Installation type H
Installation type D
* Base plate inlet DN 500 and pump inlet DN 400.
For vertical, dry installations, type
D, install the pump on a
permanent concrete foundation.
For horizontal, dry installations,
type H, the pump is mounted on a
base stand from factory.
We recommend that you use a
reducer between the inlet pipe
and the pump in horizontal
installations. In horizontal
installation the reducer must be of
the eccentric type and must be
installed so that the straight edge
is pointing upwards. In this way,
the accumulation of air in the inlet
pipe is avoided and the risk of
disturbance of operation is
eliminated.
Make sure that the pipes are
installed without the use of undue
force. Do not allow loads from the
weight of the pipes to be carried
by the pump. We recommend that
you use loose flanges to ease the
installation and to avoid pipe
tension at flanges and bolts.
Do not use elastic elements or
bellows in the pipes; never use
these elements as a means to
align the pipes.
Range
Bolts
Pull-out strength
[kN]
50-62
4 x M16
10
66-70
6 x M24
25
Dry
installation
Bolts
Pull-out
strength [kN]
DN 100
3 x M20
18
DN 150
6 x M20
18
DN 200
18
DN 250
6 x M24
25
DN 300
25
DN 500/400*
25
DN 500
25
The pull-out strengths stated are
without safety factor. The
required safety factor may
depend on the materials and the
methods used for anchoring.
