PB3 User Instruction
Page 16 of 39
3.4 Initial alignment
3.4.1 Shaft/coupling alignment
NOTE
The following information regarding shaft alignment is only offered as a general
guideline. PUMPIRAN requires that all shaft alignment be performed in accordance
with specifications set forth in Chapter 7, Shaft Alignment from API Recommended
Practices 686/PIP REIE 686, First Edition.
Caution
Shaft alignment must be correct for successful operation. Rapid wear, noise,
vibration and actual damage to the equipment may be caused by shaft misalignment.
The shafts must be aligned within the limits given within this section
.
NOTE
Adjustment to correct the alignment in one direction may alter the alignment in
another
direction
. Always check in all directions after making any adjustment.
Coupled equipment must be aligned to minimize unnecessary stresses in shafts, bearings and coupling. Flexible
couplings will not compensate for appreciable misalignment. Foundation settling, thermal expansion or nozzle
loads resulting in base plate/foundation deflection and vibration during operation may require the full coupling
misalignment capability.
3.4.1.1 Alignment methods
The following methods may be used to align equipment train. The methods a) and b) are dial indicator based.
a)
Rim and face alignment
