Goulds Pumps CV 3171 - IOM - Manual (Page 22)

22
CV 3171 IOM 05/11
temperatures and vapor proof construction. The
standard configuration is packed. Since no fluid is
in the column to lubricate the packing, the packing
is grease lubed. The packing is installed at the
factory prior to shipment. A screw type grease cup
is provided for the packed box. Fill the cup with
grease and give the cap several turns to force
grease into the packing. Fresh grease should be
installed on a regular basis to insure constant
lubrication for the packing. Frequent inspection
after startup is recommended to check usage and
establish the best relubrication interval.
Mechanical Seal Upper Stuffing Box
A mechanical seal is frequently supplied on upper
stuffing box applications. The seal is installed and
set at the factory. Cartridge seals will still have the
setting clips installed and should be removed.
Refer to the seal manufacturer’s guidelines for any
special requirements for the particular seal
provided.
The mechanical seal used in an ATEX
classified
environment must be
properly certified.
The mechanical seal must always be
properly flushed. Failure to do so will
result in excess heat generation and
seal failure.
WARNING
Some seals require oil lubrication from
a bottle oiler, some are dry running,
and some may require external flush
plans. Do not allow the seal to run dry
unless it is specifically designed for dry
running.
Steam Jacketed Pumps
The steam jacket connections are located on the
support plate. Connect the steam in line to an
appropriate source of steam. The steam
out/condensate return connections should be
made as dictated by the installation requirements.
A suitable trap should be used.
Float Controls
A variety of float controls can be supplied by
Goulds. Refer to the float control installation
instructions provided with the controls for proper
installation procedure. Procedures for some of the
more common controls are provided in Appendix I.
Checking Rotation
Rotation should have been checked prior to
coupling alignment and installation. Refer to
previous section if this has not been done.
Check For Free Turning
Before pump is started, rotate the pump by hand to
be sure it turns freely and does not rub or bind.
Motor Bearing and Coupling
Check to be sure the motor bearings and coupling
are properly lubricated, if required. Refer to
manufacturers recommendations.
Check Impeller Clearance
Improper impeller adjustment could
cause contact between the rotating
and stationary parts, resulting in a
spark and heat generation.
WARNING
Check impeller clearance before
starting pump.
The pump efficiency is maintained when the proper
impeller clearance is set. The clearance is initially
set at the factory. The settings from the factory
could change due to piping attachment. Refer to
Section 5 for procedures on setting impeller
clearance.
Coupling Guard and Safety Devices
Insure coupling guard and any other safety devices
are properly installed.
Priming
Pumps that are not self-priming must
be fully primed at all times during
operation.
Never start the pump until it has been properly
primed. The pump casing should be fully
submerged prior to starting the pump.
CAUTION
Do not run the pump dry, as this may
damage the pump and/or steady
bearings.