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A.0500.551 – IM-TGMAG/02.00 EN (02/2008)
3.18.4 Shaft rotation
Shaft rotation determines which port of
the pump is suction and which is discharge.
Relation between shaft rotation and
suction/discharge side is indicated by the
rotation arrow plate attached at the relief
valve or the top cover. The small arrows
2 and 3 indicate the flow direction of the
pumped liquid. Always make sure that the
pump rotates in the direction indicated
by the rotation arrow plate.
For the specified direction of rotation, see the arrow plate on the pump.
3.18.5 Suction and discharge pipes
3.18.5.1 Forces and moments
Note! Excessive forces and moments on the connecting flanges derived from piping can cause
mechanical damage to pump or pump unit.
Pipes should therefore be connected in line, limiting the forces on the pump connections.
Support the pipes and make sure they remain stress-free during operation of the pump.
See table for maximum allowable forces (F
x, y, z
) and moments (M
x, y, z
) on the connecting flanges with
pump on a solid foundation (e.g. grouted base plate or solid frame).
When pumping hot liquids attention should be given to forces and moments caused by thermal
expansion in which case expansion joints should be installed.
Check after connecting whether the shaft can move freely.
Installation of safety relief valve
TG MAG pump size F
x, y, z
(N) M
x, y, z
(Nm)
15-50 2600 675
23-65 2900 800
58-80 3550 1375
86-100 4100 1750
185-125 5900 3750
1 Direction of rotation
of pump shaft
2 Suction side
3 Discharge side
Suction Discharge Suction
Suction Discharge Suction