Goulds Pumps 4550 - IOM User Manual
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CAUTION
DO NOT operate pump at reduced capacity or with
discharge valve closed. At this point, all energy
developed by the pump will convert to heat, which
may cause either mechanical damage, or vaporizing
of pump liquid in the impeller eye, causing
cavitation.
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CAUTION
DO NOT operate pump when tank level drops below
minimum pump submergence.
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CAUTION
DO NOT operate pump if surging occurs.
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CAUTION
DO NOT operate pump if motor overloads. This will
cause overheating of the motor and possible motor
damage.
STARTING THE PUMP
1.
Connect coupling, following instructions for the
particular make of coupling used. This data is
supplied separately, giving complete instructions for
connection, lubrication, alignment and maintenance.
2.
Check for free turning.
3.
Install coupling guard.
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WARNING
Never operate a pump without coupling guard
properly installed. Personal injury will occur if
pump is run without coupling guard.
4.
Before pump is started, the flushing flow specified in
Pump Bearings should be started. Do not run the
pump without flush to the column bearings (197B).
(Internal for clean liquids - external for dirty liquid).
5.
Starting: Pump is now ready to start. Start pump with
closed or slightly opened discharge valve. Open
immediately after starting.
OPERATIONAL CHECKS
Inspect pump carefully and frequently during the first few
hours of operation. Check motor for excessive heating.
Check motor for excessive vibration or unusual noise.
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WARNING
Do not run pump at greatly reduced flow because
all the motor power will go into heating the liquid in
the pump and damage may result. If this condition
exists over a long period, the temperature of the
liquid in the pump may increase until the boiling
point is reached. If this occurs, the rotating parts
are exposed to vapor with no lubrication, and they
may score or even seize to the stationary parts.
Continued operation under these conditions may
create an explosive hazard due to the confined
vapor under high pressure and temperature.
OPERATING WITH SURGE
CONDITIONS IN LINE
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CAUTION
If the pump is installed with a quick-acting valve in
the discharge line that could close when the pump is
running, dangerous pressure surges may be built up
that can cause damage to the pump or line. In
services of this kind, some cushioning arrangement
must be provided to protect the pumping equipment.
FREEZING CONDITIONS
If exposed to freezing conditions while the pump is
standing idle, liquid inside the pump must be drained.
SHUTDOWN PRACTICE
When a check valve is installed in the discharge, the
pump can be shut off without closing any valves. When
no check valve is used, the discharge valve must be
closed before the pump is stopped to prevent back flow
through the pump.
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WARNING
When handling hazardous and/or toxic fluids,
proper personal protective equipment should be
worn. If pump is being drained, precautions must
be taken to prevent physical injury. Pumpage must
be handled and disposed of in conformace with
applicable environmental regulation.
4550 IOM 5/08
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