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3 INSTALLATION
Careful attention to correct installation of HP & LH
pumps, and recognition of certain limitations to
the operating conditions of the pump, will ensure
long life and trouble-free running.
ATTENTION
Failure to follow these instructions could result in
personal injury or loss of life.
Take particular care over the following:
3.1 UNPACKING AND LIFTING
OF THE PUMP
Unpack the pump/unit upon delivery and inspect
it for visible transport damage.
Any damage occurred during the transporting has
to be immediately reported to the transport agent
after receipt of the consignment. Do not put the
damaged products into operation.
The pumps need to be transported and secured
with care to ensure no damage is caused. Smaller
pumps without motor weigh less than 20kg and
can be lifted by hand. Larger pumps with lifting
eye bolt and complete units should be lifted as
shown on the below pictures. Straps with
sufficient load capacity must be used.
Make sure you set the pump down on a stable
horizontal surface.
3.2 OPERATING LIMITATIONS
PRIMING: HP & LH pumps are not truly self-
priming and should be installed in a "flooded inlet"
pipe arrangement i.e. with the pump lower than
the level of liquid to be pumped and with the
supply pipe falling continuously to the pump with
no loops.
PRESSURE: Do not operate the pump above the
maximum differential pressure shown on the
nameplate, not even for a few seconds, as
damage to the pump components will result,
leading to metal particles in the pumped fluid,
ineffective cleaning and possibly complete pump
seizure.
ATTENTION
Never run the pump against a closed valve. Note
that
the
pressure
temperature.
SOLIDS: HP & LH pumps can handle soft solids
in suspension but will be damaged by hard
particles. Take care when pumping solids, crystals,
etc.
Never allow metal parts to enter the pump, i.e.
weld metal, screws, tools, etc. as these will stop
the pump, leading to damaged rotors, rotor case
and shafts.
CAVITATION:
The
without sufficient pressure of liquid at the inlet
port of the pump. Normally atmospheric pressure
is sufficient but the actual pressure needed, is
higher for:
•
High Viscosities
•
High Temperature
•
High Pump Speeds
•
Volatile Liquids
Insufficient inlet pressure will cause the pump to
cavitate leading to low performance, noise and
short pump life. Ensure inlet pipes are short,
large bore and do not collapse under vacuum.
3.3 LOCATION & ORIENTATION
The pump should be located:
•
As close as possible to the fluid source
and as low as possible to maximize the
net inlet pressure available to the pump.
limit
varies
with
pumps
cannot
operate
the
8
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