KSB Amarex - Connecting the Piping

5 Installation at Site
25 of 82
Amarex
2573.820/02-EN
Floor temperature Minimum curing time
Dry concrete Wet concrete
[°C] [min]
≥ 0 300 600
≥ -5 300 600
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
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.
F
x
F
z
F
y
M
y
M
z
M
x
Fig.6: Permissible flange loads
Table12: Permissible flange loads
Nominal flange
diameter
Forces
[N]
Moments
[Nm]
F
y
F
z
F
x
∑F M
y
M
z
M
x
∑M
50 1350 1650 1500 2600 1000 1150 1400 2050
65 1700 2100 1850 3300 1100 1200 1500 2200
80 2050 2500 2250 3950 1150 1300 1600 2350