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CHEMFLO 4 (en)
Hs
MINIMIZE LENGTH &
AVOID SHARP BENDS NEAR INLET
Hd
SUCTION
PIPE
DISCHARGE
PIPE
UNION FLANGE
SUCTION
VALVE
OVER HEAD WATER TANK
EYE OF IMPELLER
CASING
UNION
FLANGE
Hs = SUCTION HEAD (NPSHr)
DISCHARGE
VALVE
Hd = DISHCARGE HEAD
WORKING OF CENTRIFUGAL PUMP
Figure 3
OPERATING INSTRUCTIONS
Inspect the Pumpak as soon as it is received to make certain
that no parts are missing or have been broken in shipment.
Damage should be reported immediately to the shipping
company.
CAUTION:
Do not disturb the assembly shim
in the suction opening of the pump housing until after the
Pumpak has been completely assembled to the driver.
The Pumpak utilizes a single self-adjusting type mechanical
seal that is lubricated and cooled by the liquid in the pump.
THE PUMP MUST NEVER BE OPERATED WITHOUT LIQUID
IN THE HOUSING.
WORKING OF CENTRIFUGAL PUMP:
A centrifugal pump operates through the transfer of rotation-
al energy from one or more driven rotors, called impellers.
The action of the impeller increases the fluid’s velocity and
pressure and directs it towards the pump outlet.
WEAR AND INSPECTION POINTS
Shaft:
Inspect threads, keyways and shoulders. Replace if
damaged.
Ball bearings (Pedestal and hydraulic models):
Replace if
worn, loose, or rough and noisy when rotated. If dirty, clean
with solvent, dry and coat with a good lubricant. New bear-
ings should not be unwrapped until ready for use.
Impellers:
Replace if excessively worn or corroded. The im-
peller should have been statically and dynamically balanced
at the factory, and static and dynamic balance must be main-
tained for proper operation of your equipment.
Mechanical seals:
Should be inspected for, lack of lubrica-
tion, misalignment, overheating, abrasive materials damage,
and corrosion.
Alignment:
Proper alignment between pump shaft and
motor shaft is key to the performance of shaft seals and
bearings. Improper alignment can lead to premature pump
failure.
Pedestal Style:
Inline shaft to shaft spacing is dependent
upon the coupling being used. Check the alignment carefully
between the pump and the drive.
RELEASED 03/Sep/2021 12:38:56 GMT