Piping; Suction Pipe; Inlet Pipe; Discharge Pipe - Andritz HP 45 Série Instructions De Service

Series HP 45
• Mount the pump side coupling half to the motor coupling half
and tighten the screw (see table). The screws of the disc cou-
pling are to be secured by sticking.
Thread [mm]
M8
M12
M16
Table 2: Tightening moment for coupling screws
• Mount motor with coupling onto motor stool, screw-down con-
nection screws.
• Adjust the pump rotor axially to centre.
• Spot-drill the pump shaft through thread of fastening bolt.
• Screw-in adjusting screw and tighten well.
3.3.4 Pourring and other final checks
• After aligning and fixing the pump set in position, pour the
baseplate with rapid hardening, non-shrinking cement mortar
and consolidate it.
• Allow to set for at least 48 hours.
• Retighten the fixing bolts.
• Check the alignment of pump and motor.
3.4

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!).
3.4.1 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 the piping has been connected, check the running of the
pump and alignment of coupling.
• 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.
3.4.2

Suction Pipe

• The maximum flow rate is 2 m/s (at max. permissible capaci-
ty).
• 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.
Tightening moment [Nm]
36
125
305
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.
3.4.3

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.
3.4.4

Discharge pipe

• Lay piping at an angle sloping upwards.
• Maximum flow rate 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
19