ITT Goulds Pumps V 3298, Installation, Operation And Maintenance Instructions

Page: 19 / 148

ALIGNMENT AND ALIGNMENT PROCEDURE
s
! WARNING
Before beginning any alignment procedure, make sure
driver power is locked out. Failure to lock out driver
power can result in serious personal injury.
!
Alignment procedures must be followed to prevent
unintended contact of rotating parts. Follow
coupling manufacturer's coupling installation and
operation procedures.
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 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 to
alignment have occurred during grouting process.
·
After Connecting Piping - To ensure that pipe strains
haven’t 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 and maintenance
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 2 below shows recommended
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 2
Cold Settings of Parallel
Vertical Alignment
Pumpage
Temperature Set Driver Shaft
50°F (10°C) .002in. (.05mm) LOW
150°F (65°C) .001in. (.03mm) HIGH
250°F (120°C) .005in. (.12mm) HIGH
3298 Family Rev. 4/07
19
3
B