Carver Pump RSA - Page 43

RS – Multi-Stage, I-280
Centrifugal Pump 280 – 16.03.EN
37
Example – With Standard Sleeve Bearing
– RS9-A stage 11 Axial Impeller Alignment setting = .742”
Impeller without sleeve = .760” / With sleeve = .760” – No change
Add two shims = .020” – Measurement now at .765” – meaning .015” Gap between impeller and sleeve
Remove one shim = .010” – Measurement now at .760” minus the .005” Gap and minus the .005 Gap from
stage 10 gives a Final = .750” Axial Impeller Alignment setting for stage 11 = Good due to +/- .010”
tolerance.
Example – With Optional Mechanical Seal
RS9-A stage 15 Axial Impeller Alignment setting = (-.152”)
Impeller without sleeve = (-.135”) / With sleeve = (-.135”) – No change
Add two shims = .020” – Measurement now at (-.130”) – meaning .015” Gap between impeller and sleeve
Remove one shim = .010” – Measurement now at (-.135”) minus the .005” Gap and minus the .005 Gap
from stage 14 gives me a Final = (-.145”) Axial Impeller Alignment setting for stage 15 = Good due to +/-
.010” tolerance.
Table 17. Axial Alignment Worksheet
Table 3.
Axial
Impeller
Setting
Impeller with
NO Sleeve
Measurement
Impeller
WITH Sleeve
Measurement
Number
of (.010”)
Shims to
Lift
Impeller
Axial Impeller
Alignment
Measurement
#2
Number of
Shims Left
out to
Achieve
Table 3
Setting
Gap
left in
Stack-
up
Final Axial
Impeller
Alignment
Setting
Shims to
Remove
Stage 9
Stage 10
Stage 11
Stage 12
Stage 13
Stage 14
Stage 15
Stage 16
Stage 17
Stage 18