Goulds Pumps 3640 - IOM - Manual (Page 23)

Installation
NOTICE:
Proper alignment is the responsibility of the installer and the user of the unit. Check the
alignment of frame-mounted units before you operate the unit. Failure to do so can result in
equipment damage or decreased performance.
Alignment methods
Three common alignment methods are used:
• Dial indicator
• Reverse dial indicator
• Laser
Follow the instructions from the equipment manufacturer when you use the reverse dial
indicator or laser methods. Detailed instructions for using the dial indicator method are
contained in this chapter.
Alignment checks
When to perform alignment checks
You must perform alignment checks under these circumstances:
• The process temperature changes.
• The piping changes.
• The pump has been serviced.
Types of alignment checks
Type of check When it is used
Initial alignment (cold alignment) Prior to operation when the pump and the driver are at ambient
check temperature.
Final alignment (hot alignment) After operation when the pump and the driver are at operating
check temperature.
Initial alignment (cold alignment) checks
When Why
Before you grout the baseplate This ensures that alignment can be accomplished.
After you grout the baseplate This ensures that no changes have occurred during the grouting
process.
After you connect the piping This ensures that pipe strains have not altered the alignment.
If changes have occurred, you must alter the piping to remove pipe
strains on the pump flanges.
Final alignment (hot alignment) checks
When Why
After the first run This ensures correct alignment when both the pump and the driver
are at operating temperature.
Periodically This follows the plant operating procedures.
Permitted indicator values for alignment checks
NOTICE:
The specified permitted reading values are valid only at operating temperature. For cold
settings, other values are permitted. You must use the correct tolerances. Failure to do so can
result in misalignment and reduced pump reliability.
IMPORTANT
Model 3640 Installation, Operation, and Maintenance Manual 21