Mechanical Seal; Maintenance - SAER Elettropompe TM Serie Manual De Empleo Y Mantenimiento

6.5 CHECKING OF THE SEAL

MECHANICAL SEAL

The mechanical seal does not require regulations and/or maintenance. It's possible a loss of liquid during the first instants of operation due to the
arrangement of the seal. If the loss should not stop, stop the group and research the cause.
SOFT PACKING
i. Regulate the tightening of the soft packing after about 30 minutes of working.
ii. After the tightening of the soft packing, wait some minutes: the loss of liquid have to be equal to a light dripping (between the 20 and the 100 drops
per minute).
iii. If necessary, modify the tightening of the soft packing.
iv. After some hours of operation, verify again the dripping.
The lack of dripping from the packing seal could result in heavy damage of the seal: don't tight too much the soft packing.
WARNING!
Ensure the dripping also in minimum pressure condition.
6.6 STOP THE PUMP/ELECTROPUMP
i. If the non-return valve is not present, close the gate valve on the delivery pipe.
ii. If there is no foot valve present, close the gate valve on the suction pipe.
iii. Stop the electrical feeling
If the pump / electric pump remains inactive at low temperatures or, at any rate, for a period exceeding three months, it is a good idea
WARNING!
to empty the pump through the specific cap.
6.7 STORAGE
Pump installed, not in operation but ready to be started up: operate the pump for at least 10 minutes once a month.
Pump removed from the system and put into storage: clean the pump and protect its surfaces from corrosion by applying appropriate products.

7. MAINTENANCE

Before executing any operation, turn off the power and prevent it from being reconnected.
Do not make changes to the product without authorization.
In the event it is necessary to perform any type of maintenance, the following precautions must be observed:
i.
ii.
iii.
iv.
The surfaces of pump and motor can reach high temperatures. Wait to cool before handling and use appropriate personal
protection.
WARNING! Schedule a regular cycle of maintenance based on the type of employment and conditions of use.
7.1 OPERATIONS NEEDED EVERY 1000 WORKING HOURS AND NOT LESS THAN ONCE A YEAR
Check:
• the state and the temperature of the bearings;
• the level of vibrations at the bearing housings;
•
the condition of the lubricant for bearings lubricated with oil or outside greaser;
• seals conditions:
o
mechanical seals must not have any leaks;
o
for soft packing seals, dripping must be on the initial values
•
the gaskets conditions: there must be no leakages;
• alignment of the complete set;
• performances of the pump (flow / head);
•
motor data (current consumption, value and imbalance of voltages, isolation, vibrations, etc. ...): refer to motor instruction;
• the condition of all electrical connections (terminal, grounding, control panel, etc. ...);
Record data and keep them for future reference.
WARNING! Perform measurements with appropriate instruments.
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disconnect the pump motor from the electrical system;
wait until the temperature of the liquid is such not to create a danger of burns;
if the liquid handled by the pump is harmful for one's health, it is indispensable to observe the following warnings:
a. the operator must wear suitable individual protection devices (mask, goggles, gloves, etc.);
b. the liquid must be carefully collected and disposed of with respect for current law;
the pump must be washed inside and out, disposing of the residues as said above.
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