7 Servicing/Maintenance
49 of 96
Magnochem-Bloc
Example of functional test
To test the correct function of the shaft seal, proceed as follows, for instance:
Before starting up the pump, prepare it by fitting an additional connection for the
test fluid.
1
2
4
3
Fig. 15:
Schematic of test set-up
1
Connection 8 M.1
2
Pressure gauge
3
Shut-off element
4
Inert gas (e.g. nitrogen)
1. Fit pipework with shut-off element at connection 8 M.1 (see illustration).
2. Provide a pressure gauge with display, unless already fitted for leakage
monitoring.
3. Shut off the connection for inert gas during pump operation (close the valve).
WARNING
Fluid handled in the bearing bracket lantern in the event of a defective
containment shroud
Hazard to persons and the environment!
▷
Provide a suitable vessel to contain any leakage.
▷
Wear protective clothing if required.
NOTE
Before testing the shaft seal function, switch off the pump set as stipulated and
close the shut-off elements in the suction and discharge lines. Allow the pump set
to cool down to ambient temperature. Use inert gas (e.g. nitrogen) as test fluid.
4. Connect the test fluid line.
5. Open the shut-off element and fill bearing bracket lantern 344 with test fluid
until a pressure of 2-3 bar is reached.
6. Shut off the test fluid supply.
7. Check the pressure gauge reading: the pressure must not drop significantly.
ð
If the pressure drops quickly, replace the shaft seal.
The following must be observed when repairing a pump with a defective
containment shroud:
▪
As a rule, replace all sealing elements.
▪
Also check all leakage barrier components for corrosion: if corrosion damage is
found, replace the bearing bracket lantern, intermediate piece with shaft seal
and the outer rotor (leakage barrier components )
Summary of Contents for Magnochem-Bloc
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