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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 escaping hot, toxic, corrosive or flammable fluids!
▷ Do not use the pump as an anchorage point for the piping.
▷ Anchor the pipes 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 for 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 of reverse rotation
Increased vibrations!
Damage to mechanical seals and bearings!
▷ If long risers are used, fit a swing check valve to prevent excessive rotational
speed of the pump running in reverse after it has been stopped.
Watch the venting function when arranging the swing check valve.
▷ Observe the maximum permissible speed (depending on the mechanical seal
and bearings) in the event of reverse rotation.
Fig. 6: Permissible flange loads
Table 10: Permissible flange loads
Nominal flange dia-
meter
F
50
1350
65
1700
80
2050
100
2700
150
4050
5.3.1.3 Fitting the guide rail arrangement
The pump set is guided into the sump or tank along a vertical guide rail. It attaches
itself automatically to the duckfoot bend which has been fitted to the floor.
Sanipump VX 65/80
Forces
[N]
F
F
∑F
y
z
x
1650
1500
2600
2100
1850
3300
2500
2250
3950
3350
3000
5250
5000
4500
7850
Moments
[Nm]
M
M
M
y
z
x
1000
1150
1400
1100
1200
1500
1150
1300
1600
1250
1450
1750
1750
2050
2500
∑M
2050
2200
2350
2600
3650
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