Installation
XHD Installation, Operation, and Maintenance Manual
28
Types of alignment checks
Type of check
When it is used
Initial alignment (cold alignment)
check
Prior to operation when the pump and the driver are at ambient
temperature.
Final alignment (hot alignment)
check
After operation when the pump and the driver are at operating
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. The correct tolerances must be used. Failure to do so can
result in misalignment.
When dial indicators are used to check the final alignment, the pump and drive unit are
correctly aligned when the total indicator runout is a maximum of 0.10 mm | 0.004 in. at
operating temperature.
Cold settings for parallel vertical alignment
Introduction
This section shows the recommended preliminary (cold) settings for electric motor-driven
pumps based on different temperatures of pumped fluid. Consult driver manufacturers for
recommended cold settings for other types of drivers such as steam turbines and engines.
Recommended settings for model XHD
Pumped fluid temperature
Recommended setting for driver shaft
10°C | 50°F
0.05 mm | 0.002 in., low
65°C | 150°F
0.03 mm | 0.001 in., high
120°C | 250°F
0.12 mm | 0.005 in., high
Alignment measurement guidelines
Guideline
Explanation
Rotate the pump coupling half and the driver coupling half
together so that the indicator rods have contact with the same
points on the driver coupling half.
This prevents incorrect measurement.
Move or shim only the driver in order to make adjustments.
This prevents strain on the piping instal-
lations.
Make sure that the hold-down bolts for the driver feet are tight
when you take indicator measurements.
This keeps the driver stationary since
movement causes incorrect measure-
ment.
Make sure that the hold-down bolts for the driver feet are loose
before you make alignment corrections.
This makes it possible to move the driver
when you make alignment corrections.
Содержание Goulds Pumps XHD
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Страница 27: ...Installation XHD Installation Operation and Maintenance Manual 25 Direct coupled baseplate leveling worksheet ...
Страница 147: ...Parts Listings and Cross Sectionals XHD Installation Operation and Maintenance Manual 145 Figure 130 Optional features ...
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