Piping; Suction Pipe - RITZ Series RITZBloc Betriebsanleitung

Series RITZBloc
Setting dimensions:
Pump/Motor flange
Motor size
diameter
90S - 90L
100L - 112M
132S - 132M
160M - 180L
200L
Setting dimensions
± 0,1
3.3

Piping

Non-binding suggestions for proper design and installation of
the pipework (the exact design of the pipework must remain the
responsibility of the project manager!).
3.3.1 General
• Provide support for the piping on both sides of the pump and
attach it unstressed onto the pump. Please observe the max.
permissible branch loads (refer to para. 7.2).
• After piping connection please check pump on well running.
• Use bellow expansion joints with linear reducers.
• Alterations in the length of the piping caused by harsh tem-
peratures and other strains can be prevented by the use of
anchorages on both sides of the pump.
• The pipework should be short and direct and changes of di-
rection should be avoided where possible.
3.3.2

Suction Pipe

• The maximum flow rate is 2 m/s (at max. permissible ca-
pacity).
• Do not fit a row of quarter bends on different levels.
• The pipe should be laid at an inclined angle to the pump (at
least 1 %).
• The pipework must be completely vented and sealed.
• Provide a separate suction pipe for each pump.
• When operating the pump in suction mode without a foot
valve, provide a vacuum installation.
• Ensure that no gas can accumulate in the suction pipe.
16
Setting
dimensions
± 0.1 mm
200 50
250 60
300 80
350 110
400 110
Table 2: Setting dimensions
Sketch for setting dimensions
suction pipe
Instructions for laying the suction branch
• Minimum submergence (1):
Hm = v²/2g+0.1
Hm = minimum submergence
v = flow rate when pumping maximum capacity
g = local gravitational constant = 9.81 m/s²
• The distance from the floor of the container (2) must be at
least half the diameter of the pipe.
3.3.3 Inlet pipe
• Should be laid as the suction pipe but with the pipe at an an-
gle sloping away from the pump (at least 1 %).
• Fit a return flow stop before the pump.
3.3.4 Discharge pipe
• Lay piping at an angle sloping upwards.
• Flow rate approx. 3 m/s (note the fall in meters).
• Ensure that the piping is free of tight spots.
• The pipes must be laid so that the danger of solids blocking
other pumps is avoided.
• Flange and piping must be designed in accordance with the
maximum pressure.
• Avoid gas accumulation and vent high points if necessary.
• Differing pipe diameters cause variations in flow rate and
therefore need to be avoided.
• Install a sluice valve and return flow stop.
inlet pipe