Vibration Dampening - Grundfos CR-H Série Manuel D'installation Et D'opération

Bolt sleeves can be used to allow final positioning of the bolts.
The sleeves are a minimum of 3 times larger than the bolt, and
have a length of at least 10 times the diameter. Figure 7 (pos. b)
shows the foundation bolt and the bolt sleeve in which it is
installed.
a
Fig. 7 Bolt in position (pos. a) and bolt sleeve detail (pos. b)
Pos. Description
1 Nut
2 Washer
3 Base plate
4 Bolt sleeve
5 Non-bonding fill
6 Concrete
When the foundation bolts are in position, the pump can be
placed on the foundation. The base plate can now be leveled
using shims, if necessary, so that it is completely horizontal.
See fig. 8.
Fig. 8 Alignment with shims
10
b
1
2
3
4
5
6
Shims

8.3 Vibration dampening

If vibration dampers are used, they must be installed under the
foundation.
Pumps with motor size ≤ 40 hp (30 kW) can use vibration
dampers as shown in fig. 9.
For pumps with motor sizes ≥ 50 hp (37 kW), use a vibration
damper as shown in fig. 10.
Vibration
dampers
Fig. 9 Pump on vibration dampers
Vibration
damper
Fig. 10 Pump on vibration damper