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7 Servicing/Maintenance
7.3.4
Checking the mechanical seal leakage
WARNING
Fluids, consumables and supplies which are hot and/or pose a health hazard
Hazard to persons and the environment!
▷ Collect and properly dispose of flushing fluid and any residues of the fluid
handled.
▷ Wear safety clothing and a protective mask, if required.
▷ Observe all legal regulations on the disposal of fluids posing a health hazard.
WARNING
Excess pressure inside the pump set
Risk of injury when opening the pump set!
▷ Take care when opening the inner chambers. Equalise the pressure.
NOTE
Slight wear of the mechanical seal is unavoidable. This will be aggravated by
abrasive substances contained in the fluid handled.
Checking the leakage chamber serves to assess the function of the drive-end
mechanical seal.
Fig. 20: Checking the mechanical seal leakage
Always apply a liquid sealant (e.g. Hylomar SQ32M) to sealing surfaces
FD
marked with this symbol.
✓
A suitable container for the leakage is on hand.
✓
The pump is positioned horizontally on a level surface and is protected against
rolling off. (⇨ Section 3.2 Page 10)
1.
Place the container underneath screw plug 903.02.
2.
Remove screw plug 903.02 and joint ring 411.02. Observe the plate "Leakage
drain".
3.
Screw in a sufficiently long tube (1) with G 1/2 thread.
4.
Carefully rotate the pump set until the tube points downwards.
5.
Drain the leakage fluid into a container positioned underneath the tube.
⇨ If there is no leakage or, after several years of operation, only a small
amount, the mechanical seals are working properly. If the leakage exceeds 1
litre, the mechanical seals are defective and must be replaced.
6.
Unscrew the tube (1).
7.
Fit screw plug 903.02 together with a new joint ring 411.02.
Amacan S
(1)
903.02
FD
411.02
45 of 100
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