KSB Amarex KRT Installation & Operating Manual page 23

Fig. 8: Permissible flange
loads
5 Installation at Site
5.3.1.2 Connecting the piping
DANGER
Impermissible loads acting on the flange of the duckfoot bend
Danger to life from leakage of hot, toxic, corrosive or flammable fluids!
▷ Do not use the pump as an anchorage point for the piping.
▷ Anchor the pipelines in close proximity to the pump and connect them without
transmitting any stresses or strains.
▷ Observe the permissible flange loads.
▷ Take appropriate measures to compensate thermal expansion of the piping.
NOTE
When the pump set is used for draining low-level building areas, install a swing
check valve in the discharge line to avoid backflow from the sewer system.
CAUTION
Critical speed
Increased vibrations!
Damage to mechanical seals and bearings!
▷ Install a swing check valve in longer riser pipes to prevent the pump from
excessive running in reverse.
When fitting a swing check valve, make sure that the unit can still be vented
properly.
Table 10: Permissible flange loads
Nominal flange
diameter
F
y
50/65 1350
80 2050
100 2700
5.3.1.3 Fitting the guide wire arrangement
The pump set is guided into the sump or tank along two parallel, tightly stretched
guide wires made of stainless steel. It attaches itself automatically to the duckfoot
bend which has been fitted to the floor.
NOTE
Should site conditions/piping layout, etc. require the wire to run off the vertical, do
not exceed a maximum angle of 5° to ensure reliable fitting and guiding of the
pump set.
Amarex KRT
Forces [N]
∑F
F F M
z x
1650 1500 2600 1000
2500 2250 3950 1150
3350 3000 5250 1250
Moments [Nm]
∑M
M M
y z x
1150 1400 2050
1300 1600 2350
1450 1750 2600
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