HAMMELMANN B7.02502.0210, Руководство по эксплуатации

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Planning the installation Page 1 of 2 Chapter 3
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3.0 Planning the installation
3.1 Piping system
•
Note the arrows on the pump branches
indicating the direction of flow.
•
Choose nominal widths of the pipelines
according to the nominal widths of the pump
branches or larger ones with the
corresponding reductions.
•
Flange sealing must not protrude on the
inside.
•
Ensure that the pipework is clean before
installing of the pump.
•
Support the pipework in order to avoid
distortions at the pump components (risk of
damage to pump components)
•
Avoid abrupt changes of cross section and
direction.
•
Where different diameter pipework is to be
used, connection should be by eccentric
transition pieces. This will avoid the formation
of air pockets in the pipework.
•
For difficult pumping on the suction side, to
stabilise the flow, a pipe length 15 times the
diameter of the suction branch should be
installed before the suction branch.
•
The flow rate in the suction line or inflow line,
must not exceed 2 - 3 m/s.
3.1.1 Suction line / inflow line
See the sketches below for the optimum layout of
pump installation for flow and suction lift
operation.
positive suction head operation suction lift operation
Ensure that air pockets cannot be created.
Unequal nominal widths of the suction branch and
suction line must be compensated by eccentric
transition pieces.
Flow straightener
Connection of eccentric pipe transitions
It is recommended that a filter 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.
ATTENTION
4
4
3
6
1 2
7
1 Eccentric reducer ( suction line ) or
concentric reducer ( feed line )
2 Shut-off valve
3 Suction line
4 Bend
5 Foot valve with suction strainer
6 Check valve
7 Regulating valve
5
Pump installation
HAMMELMANN Code no.: 04.03226.0769
Type 32-200