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Check the following before starting the pump:
- that the shaft guard has been fitted properly
- that there is free access for liquid
- that the valve on the discharge side is closed
The valve on the discharge side is closed during start-up to prevent
the motor from overloading, but should be opened again as soon as
the pump has been started.
4.1 Flushing water/steam/condensate etc.
In pumps with a flushed shaft seal, check that the supply of flushing
medium is open and that the flow of the medium is adequate
(approx. 15-30 l/hour).
5.1 Checking the shaft seal
Check the shaft seal in the pump for leaks on a regular basis. If the
shaft seal is leaking, replace it or its relevant parts as described below.
5.2 Replacing the shaft seal
The general drawing (page 2) shows the position and structure of the
shaft seal - both ordinary seals and seals with water/steam flushing.
To replace the shaft seal, it is necessary to dismantle the pump as
described below. Unfold the general drawing (page 2) and use it for
reference.
1. Disconnect the power supply in the motor safety switch unit by
removing the fuses and disconnecting the cables.
2. Switch off the steam and flushing water supply.
3. Close the inlet and discharge of the pump, and make sure that
there is no liquid in the pump body.
If the pump is used for hot and/or aggressive liquids, special pre-
cautions must be taken. In such cases, observe the local regula-
tions for personal protection when working with these products.
4. Once the intake and outlet pipes have been closed properly, open
the clamping ring (pos 2), take off the pump body (pos 1) and
remove the impeller (pos 4).
5. Remove the stator ring (pos 11) mounted in the back plate
(pos 7) with your fingers.
6. Remove the O-ring (pos 12) from the stator ring.
7. Use your fingers to remove the rotor ring (pos 10) mounted in the
impeller (pos 4).
8. Remove the O-ring (pos 13) from the rotor ring.
4 Operationalizing the pump
Dismantling the pump
Dismantling the shaft seal
5 Maintenance
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