Operating instructions B-Series
Version 2.4, En Page 49 of 81 21-10-2005
8.3 filling the pump
To be able to work optimally with the pump, before starting the pump must be well filled with the liquid
to be pumped.
• Open the filler cover(s) on the top of the pump.
• Completely fill the pump with the liquid to be pumped - the pump is vented at the same time.
• Close the filler cover(s).
Extra point(s) for attention with ATEX pumps.
G1.
G5.
G8.
M6.
Prevent the pump from being exposed to temperatures below freezing point if it
is filled with liquid.
Prevent the pump from dry running.
Make sure that the pump is filled with liquid at the correct temperature.
Check the resistance list to ensure that assembled elastomers are suitable for the
pumped medium. ∗
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∗
∗
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With an Ex-pump (unit) supplied by BBA Pompen these aspects are ensured for the application
indicated by the client with the associated indicated medium.
8.4 preparation of the starting of the pump/pump unit, electrically driven
With a new installation or after thorough maintenance of the pump/pump unit go through the following
check-list:
8.4.1 Main pipe
•
Have the suction and pressure lines been cleaned?
•
Have the suction and pressure lines been checked for tightness?
•
Is the suction line sufficiently protected against the penetration of foreign objects?
8.4.2 Suction line
The suction line must:
•
Be as short as possible.
•
Run up to the pump so no air pockets can originate. If this is not possible a filler or vent opening
must be fitted at the highest point of the pipe.
•
The pipe must descend to the pump if the pump receives a flow.
•
Have as few as possible bends, and bends with a large radius.
•
A wide as possible passage.
•
With different diameters eccentric reducing pieces must be fitted or air can remain in the higher
piping part.
•
There may be absolutely no signs of leaks.
•
With soiled liquids, as necessary a suction strainer or dirt catching grill must be provided with the
passage adapted to the passage in the pump.
•
Any slide valve in the suction line must be fully open.
•
At the end the piping must be sufficiently submerged in the liquid so that also with the lowest
position of the liquid no air will be drawn in.
•
No bend may be present immediately before the suction flange of the pump, particularly if there is
little difference between the available and required NPSH. This bend causes an irregular flow to
the rotor and can unfavourably influence suction.
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