J Line Pump
Horizontal Double Suction Centrifugal Pump ā API 610 Process Pump
35 V1.032818
Figure 5.7. Reverse indicator alignment of more than two units.
D. ACROSS THE DISC PACK ALIGNMENT GRAPHICAL ANALYSIS
When the distance between disc packs is long where it is not practical to try to span the distance with
indicator bracketry, the 'across the disc pack method' can be used.
On a sheet of graph paper, lay out the equipment that you are trying to align. You should use a scale
that is convenient to the size of the graph paper. The distances that are critical are:
1. Distance from centerline of one disc pack to the centerline of the other disc pack. In the
example, it is 9-1/2 inches (241.3 mm).
2. Distance from centerline of motor disc pack to center of front motor foot. In this example, it
is 3 inches (76.2 mm).
3. Distance from the center of the motor front feet to the center of the motor back feet. In this
example, it is 5-1/4 inches (133.4 mm).
4. Distance from disc pack to dial indicator on center member. In this example, the distance is
8 inches (203.2 mm).
Figure 5.8. Across the disc pack alignment graphical analysis example.
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