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Idiomas disponibles
Idiomas disponibles
ENGLISH
components (risk of damage to pump components).
- Avoid abrupt changes of cross section and direction.
- Where different diameter pipe work is to be used, connection should
be by eccentric transition pieces. This will avoid the formation of air
pockets in the pipe work (fig. 2).
- For difficult pumping on the suction side, to stabilise the flow, a pipe
length 15 times the diameter of the suction branch should be ins-
talled before the suction branch (fig. 2).
- The flow rate in the suction line or inflow line must not exceed 2 - 3
m/s.
5.1.1 Suction line
See the sketches below for the optimum layout of pump installation
for flow and suction lift operation.
Under pressure
FIG. 1
Ensure that air pockets cannot be created. Unequal nominal widths
of the suction branch and suction line must be compensated by
eccentric transition pieces (fig. 2).
FIG. 2
- It is recommended that a strainer is installed in front of the pump
with a filter surface of at least 3 times the pipe cross section (approx.
100 meshes/cm2).
- The suction opening of the suction line should be well below the
liquid level, and a strainer should be used. The strainer must be far
enough from the bottom to avoid excessive inlet losses, which
could impair pumping performance. It is advisable to check that
there is no leakage.
A shut-off valve should be installed in the feed line. It must be closed
for maintenance work. It should be installed in order to avoid air poc-
kets forming in the spindle cap, i.e. with the spindle in a horizontal
position or pointing vertically downward.
In suction
1 Eccentric reducer (suction) or concentric
reducer (discharge)
2 Isolating valve
3 Suction line
4 Bend
5 Foot valve with strainer
6 Isolating valve
7 Regulating valve
FIG. 3
5.1.2 Discharge line
The discharge piping must be installed vertical with a constant dia-
meter.
For flow regulation, a valve must be installed behind the pump. If
non-return valves are used, they should close smoothly. Pressure
shocks must be avoided.
5.1.3 Inlet and outlet connections
The various connecting points are show in the drawings. (See annex,
chapter 12, point 12.1).
5.1.4 Pressure control
For consistent control of pressure, it is advisable to install in the pipe
work a measuring point at suction and at discharge close to the
pump.
6. UNPACKING, STORAGE, HANDLING
6.1 Safety measures
CAUTION !
Never stay below the suspended load.
Keep a safe distance while the load is being transported.
Use only suitable slings, which are in good condition.
Adjust the length of the slings in such a way that the pump and/ or
the pumpset is suspended horizontally.
Do not use the eyebolts on the pump components for lifting the
assembled pump or the complete set.
Do not remove documents, which are attached to the pump.
Do not remove the protection covers from the pump suc-
tion/discharge. Otherwise, there may be a risk of contamination.
6.2 Unpacking
Before unpacking, a visual check of the packing is recommended. If
transport damage is visible, the extent should be noted on the
receipt or on the delivery note. Potential claims must be lodged
immediately with the carriers or the insurance company.
6.3 Temporary storage
If the pump or the pump unit is not installed immediately after deli-
very, it must be stored free from vibration in a dry room.
6.4 Handling
The pump or pump set must be lifted and handled as shown in the
following sketches.
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