Goulds Pumps 3420 - IOM - Manual (Page 22)

ALIGNMENT AND ALIGNMENT PROCEDURE
!
Alignment procedures must be followed to prevent
unintended contact of rotating parts. Follow
coupling manufacturer’s installation and operation
procedures.
s
! WARNING
Before beginning any alignment procedure, make sure
driver power is locked out. Failure to lock out driver
power may result in serious physical injury.
To remove guard, refer to coupling guard assembly/
disassembly instructions.
The points at which alignment is checked and adjusted are:
•
Initial Alignment is done prior to operation when the
pump and the driver are at ambient temperature.
•
Final Alignment is done after operation when the
pump and driver are at operating temperature.
Alignment is achieved by adding or removing shims from
under the feet of the driver and shifting equipment
horizontally as needed.
NOTE: Proper alignment is the responsibility of the
installer and user of the unit.
Accurate alignment of the equipment must be attained.
Trouble-free operation can be accomplished by following
these procedures.
ALIGNMENT CHECKS
Initial Alignment (Cold Alignment)
•
Before Grouting Baseplate - To ensure alignment can
be obtained.
•
After Grouting Baseplate - To ensure no changes have
occurred during grouting process.
•
After Connecting Piping - To ensure pipe strains have
not altered alignment. If changes have occurred, alter
piping to remove pipe strains on pump flanges.
Final Alignment (Hot Alignment)
•
After First Run - To obtain correct alignment when
both pump and driver are at operating temperature.
Thereafter, alignment should be checked periodically
in accordance with plant operating procedures.
NOTE: Alignment check must be made if process
temperature changes, piping changes and or pump
service is performed.
ALIGNMENT CRITERIA
Good alignment is achieved when the dial indicator
readings as specified in the alignment procedure are .002
in. (.05 mm) Total Indicated Reading (T.I.R.) or less when
the pump and driver are at operating temperature (Final
Alignment).
During the installation phase, however, it is necessary to
set the parallel alignment in the vertical direction to a
different criteria due to differences in expansion rates of
the pump and driver. Table 1 shows recommended
preliminary (cold) settings for electric motor driven pumps
based on different pumpage temperatures. Driver
manufacturers should be consulted for recommended cold
settings for other types of drivers (steam turbines, engines,
etc.)
Table 1
Cold Setting of Parallel
Vertical Alignment
Pumpage Temperature Set Driver Shaft
ambient N/A
100 °F .000" - .002" HIGH
200
°F .002” - .004” HIGH
300 °F .004” - .006” HIGH
18
3420 IOM 08/09