14
7.3.1
Prime the pump
•
Close the discharge shut-off valve (B);
•
Close the suction shut-off valve (A);
•
Unscrew the fill plug (C);
•
Gradually open the suction shut-off valve (A)
until the liquid flows from the fill plug (C);
•
Close the fill plug (C);
•
Open shut-off valve (B);
•
Vent the pump on discharge side for example
via a venting valve (D) on discharge side (see
Figure 8: Example: installation of a pump under
pressure operation);
•
Close the venting option on discharge side;
•
Close the discharge shut-off valve (B);
•
repeat these steps until all air is removed from
the pump;
•
Make sure that the suction shut-off valve is
entirely open.
•
Open the discharge shut-off valve (B);
•
Remove the fill plug (C);
•
Put a funnel into the port (C) and completely fill
the pump with the liquid to be pumped;
•
Vent the pump on discharge side for
example via a venting valve (D) on
discharge side (see Figure 9: Example:
installation of a pump in suction-operation);
•
Make sure all air is removed from the
pump;
•
Close the venting option on discharge side;
•
Close the discharge shut-off valve (B);
•
Close the fill plug (C).
7.3.2
Start the pump
•
Start the motor;
•
Gradually open the discharge shut-off valve (B);
•
Make sure the pump started correctly within 20
seconds, if not then:
•
Switch off the motor;
•
Re-prime the pump;
•
Start the motor again;
•
Switch the pump off and on for 2-3 times, after
running continues for 30 seconds and make sure
all air is removed from the pump.
7.3.3
After an extended period of non-
operation or storage
During first start-up, check the mechanical seals for
leakage due to seizure or dehydration of the
lubricating film. If so, please proceed as following:
1
Turn shaft manually;
2
Check if the mechanical seal is still leaking.
If the mechanical seal is still leaking:
1
Disassemble the mechanical seal;
2
Thoroughly clean and degrease the running
surfaces;
3
Assemble the mechanical seal again and retry
start-up.
If this doesn’t solve the shaft leakage, replacement of
the mechanical seal is necessary.
Figure 8: Example: installation of a pump
under pressure operation
20
1313
96-
A
Figure 9: Example: installation of a pump
in suction-operation
2013
1397
-A
A
B
C
D
C B
D
