Spacing Of The Impeller And Stub Shaft - Q-Pumps QIS Series Operation And Maintenance Manual

OPERATION AND MAINTENANCE MANUAL
QIS SERIES
Centrifugal Pump
3 . S PACI N G O F TH E I M PE LLE R AN D STU B S HAF T
The correct operation of the pump depends on the separation of the impeller (5) from the
backplate (7) and the fixation of the stub shaft (10) on the motor shaft. Follow the next steps
to fix the stub shaft on the motor shaft:
3a.
Position the stub shaft collar (13) with the corresponding Allen screws (14) loosely on the
stub shaft and place it on the motor shaft, it must slide in and out without problem. Figure D.
14
10
13
Figure D
3b.
Place and fix the backplate (7) into the adapter using the four hexagonal screws (22) and
washers (21). The orientation of the backplate is with the flushing holes in a vertical position;
those holes are used only with the double mechanical seal and the backplate has a square
shape in the back to keep the static face of the mechanical seal in place. Figure E.
22
21
7
Figure E
11
QIS SERIES-M02