11
NOTE
Separation of the magnetic field
Extraordinary loads during the start-up of the pump, caused by
blocking of the impeller or excessive overload of the pump can
cause the torque transmission of the magnetic coupling to sepa-
rate. This results in extreme vibrations and excessive heating
and can lead to the destruction of the magnetic coupling.
Therefore, it is essential to verify the temperature of the pump's
containment shell and to observe the load monitor of the motor.
The magnetic coupling was designed based on the torque
transmission and the material and was based on the operating
conditions provided in the order-related data sheets. It must be
ensured that the loads to which the pump is subjected during
the startup, are not exceeded (see
"Design data sheet of the mag-
netic coupling"
; in the enclosed documents).
Procedure
1. Rinsing and cleaning the pump prior to start-up.
2. Open the valve in the suction line.
3. Close the valve in the discharge line.
4. Fill the pump and the suction line up to the top edge of the
pump with medium. Allow any air bubbles to escape.
5. Observe the viscosity of the medium until the operating
temperature is reached.
6. Turn on the motor.
When using magnetic couplings, a direct start is not recom-
mended. Start the pump slowly by using a speed controlling
device, or use a soft starter.
The pump conveys medium against the closed valve in the
pressure line. This limits the start-up current.
7. Slowly open the valve in the discharge line and adjust to the
working point.
When starting the pump, loads must be kept to a minimum;
this will prevent the risk of separation of the torque trans-
mission of the magnetic coupling.
7.3
Monitoring of Operation
During operation heed the following points:
– Shearing off of shaft: Foreign objects in the pumping medi-
um can lead to impeller blockage and hence to shearing off
of the shaft.
Rule out the possibility of foreign objects in the pump-
ing medium. If necessary, install a screen, a settling tank,
or a filter.
Install a current limiter to protect the motor.
– Damage to pumping medium: If during operation the valve
in the discharge line is closed abruptly or for a long period of
time, water hammers can occur in the pump. Water ham-
mers can damage the pump and the pumping medium.
During operation do not close the valve in the discharge
line abruptly or for a long period of time.
– Damage to pump: Exceeding the rated power can lead to
damage to the pump and the magnetic coupling.
Do not exceed the max. speed of 3,600 RPM.
– Monitoring the operating conditions: In order to prevent
malfunctions or damage to the magnetic coupling, follow-
ing the recommendations below is recommended:
Use a load monitor. This will ensure that inadmissible
operating conditions such as dry running or separation
of the torque transmission due to overload of the mag-
netic coupling can be detected very quickly.
Monitoring the temperature on the containment shell
Fluid sensor in the suction line
– Damage to motor during operation with frequency convert-
er: If the speed is too low, the motor will overheat.
Please refer to the "
Motor Supplier Documentation
" in the
attached documents.
7.4
Stopping of Operation
1. Turn off the motor.
2. Close the valve in the suction line to prevent the pump from
running empty.
3. Close the valve in the discharge line.
7.5
Decommission pump
1. Turn off the motor.
2. Close the valve in the suction line.
3. Close the valve in the discharge line.
4. De-energize the pump.
5. Empty the pump.
6. Clean pump as described in
7. Dry the pump.
8. Protect the interior of the pump against moisture, for exam-
ple with silica gel.
9. Seal the pipe connections with caps to prevent penetration
of dirt and foreign objects.
10. Please see
7.6
Cleaning during operation
7.6.1
CIP procedure
The pumps of the FPM and FSM series are suited for CIP (Cleaning
In Place) procedures. The following guidelines apply to the CIP
process:
Содержание FPM 3531
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