Grundfos MAGNA 25-40 Notice D'installation Et De Fonctionnement page 28

Flange forces and torques
For maximum permissible forces and torques from
the pipe connections acting on the pump flanges or
thread connections, see fig 1.
Fig. 1 Flange forces and torques
Diameter
Fy
DN
25 ★
350
32 ★
425
40 500
50 675
★ The values also apply to pumps with union connection.
Above values apply to cast-iron versions.
For stainless steel versions, multiply the values by 2.
See ISO 5199, tables B.2 (16A and 16B), B.3 and
B.6.
Tightening torque for flange bolt threads
We recommend these tightening torques for bolts
used in flanged connections.
:
Dimension
M12
M16
28
Force
[N]
Fz Fx
425 375
525 450
625 550
825 750
Torque
27 Nm
66 Nm
ΣFb
My
650 300
825 375
975 450
1300 500
Torque
[Nm]
ΣMb
Mz Mx
350 450 650
425 550 800
525 650 950
575 700 1025