Goulds Pumps HS - IOM - Manual (Page 19)

HS IOM 5/08
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PUMP START-UP
1. Bearing lubrication Bearing must have adequate
lubrication. Engage external lubrication system.
Consult “Bearing Frame Assembly Section” of these
instructions for specific information.
2. Shaft Rotation The pump shaft must turn without any
binding or rubbing. By manually turning the rotating
element, only the uniform frictional drag of the
bearings and the stuffing box should be sensed.
3. Correct Rotation of the Driver The direction of
rotation of the driver must be checked before it can be
coupled with the pump. The direction of rotation of
the pump is indicated in a prominent location.
4. Lubricating Lines to Stuffing Box Lubricating
liquid must be flowing to the stuffing box before the
pump is started. Both mechanical seals and packing
require lubrication for continuous service.
5. Priming The pump must be completely primed before
operation.
WATER HAMMER
Water hammer is a high pressure surge within a closed
pipe system, created by rapid change in the flow rate.
Changes in the flow rate occur when there are sudden
changes in pump speed. The most common cause is
the sudden opening or closing of a valve or flow
control device. Extensive damage to the pump and
pipeline is a result of water hammer.
FREEZING
If the pump is exposed to below freezing temperatures,
the liquid should be drained during idle periods.
LOCATING PROBLEMS
1. Conditions Leading to Insufficient or No Discharge
a. Insufficient speed.
b. Excessive discharge head.
c. Insufficient NPSH.
d. Worn pump components.
e. Incorrect direction of rotation.
f. Incomplete pump priming.
g. Impeller or discharge pipe clogged.
h. Pumpage viscosity too high.
2. Conditions Leading to Excessive Power Consumption
a. Excessive speed.
b. Pump operating at high horsepower area of the
pump curve (off design point).
c. Mechanical binding or rubbing of rotating element.
d. Pumpage specific gravity and/or viscosity too high.
s
! WARNING!
This unit must never be used without prior installation
of the safety guards for rotating parts as prescribed by
O.S.H.A.
Operation of this pump with both suction and
discharge valves closed for even brief periods of time is
unacceptable and a dangerous practice. It can rapidly
lead to a violent pump failure.
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