Vibration Dampening; Outdoor Installation; Hot Surfaces; Torques - Grundfos CRT Serie Montage- Und Betriebsanleitung

6.2 Vibration dampening

If vibration dampers are used, they must be installed under the
foundation.
Vibration dampers
Fig. 10 Pump on vibration dampers

6.3 Outdoor installation

When installed outdoors, we recommend you to provide the motor
with a rain cover. We also recommend you to open one of the
drain holes in the motor flange.

6.4 Hot surfaces

Warning
When pumping hot liquids, care should be taken to
ensure that persons cannot accidentally come into
contact with hot surfaces.
Figure 11 shows which pump parts get as hot as the pumped
liquid.
Fig. 11 Hot surfaces on a CRT pump

6.5 Torques

The table shows the recommended torques for bolts in base and
flanges.
Base
CRT
[Nm]
2, 4 40
8, 16 50
8
Pump head
Pump sleeve
Base
Flange
[Nm]
50-60
60-70

6.6 Flange forces and torques

If not all loads reach the maximum value stated in the tables
below, one of these value may exceed the normal limit.
Contact Grundfos for further information.
Fig. 12 Flange forces and torques
Y-direction: Inlet/outlet
Z-direction: Direction of chamber stack
X-direction: 90 ° from inlet/outlet
Forces
Flange, Force,
DN CRT Z-direction
[mm] [N]
32 2, 4 760
50 8, 16 1350
Torques
Flange, Torque,
CR, CRI,
DN Z-direction
CRN
[mm] [Nm]
32 2, 4 820
50 15, 20 100
Force, Force,
X-direction Y-direction
[N] [N]
1170 780
1650 1500
Torque, Torque,
X-direction Y-direction
[Nm] [Nm]
970 1220
1150 1400