Hot Surfaces; Torques; Flange Forces And Torques - Grundfos CRT Serie Instrucciones De Instalación Y Funcionamiento

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.
Fig. 10 shows which pump parts get as hot as the pumped liquid.
Fig. 10 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

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. 11 Flange forces and torques
Y-direction: Direction of chamber stack
Z-direction: 90 ° from inlet/outlet
X-direction: Inlet/outlet
Pump head
Pump sleeve
Base
Flange
[Nm]
50-60
60-70
Forces
Force,
Flange,
DN CRT
direction
[mm]
32 2, 4
50 8, 16 1350
Torques
Torque,
Flange,
CR, CRI,
DN
CRN direction
[mm]
[Nm]
32 2, 4
50 15, 20 1000
Force, Force,
Y- Z- X-
direction direction
[N] [N] [N]
760 1170 780
1650 1500
Torque, Torque,
Y- Z- X-
direction direction
[Nm] [Nm]
820 970 1220
1150 1400
11