Griswold 811 - Page 15

GRISWOLD PUMP COMPANY Installation Page 13
Installation, Operation and Maintenance Manual
Griswold Model 811
Griswold Pump Company Installation Page 15
As previously mentioned, pump and motor shafts need to be in alignment while they are at their
intended operating temperature. When the shafts are aligned “cold” (at ambient temperature),
we will intentionally position the motor shaft up or down in vertical parallel alignment to allow
for thermal growth. Then, when the alignment is checked “hot” (at stable operating
temperature), the shafts should be confirmed to be in alignment. Use the values in the following
table:
Table 2
Cold Setting of Parallel Vertical Alignment
Pumpage
Temperature
Set DRIVER Shaft,
inches
50
0
F 0.002" low
150
0
F 0.001" high
250
0
F 0.005" high
350
0
F 0.009" high
450
0
F 0.013" high
550
0
F 0.017" high
650
0
F 0.021" high
700
0
F 0.023" high
Laser alignment is usually the most accurate method. Follow the laser alignment equipment
manufacturer’s instructions for this method.