90°
COMPANION FLANGE
DRIVER OR GEAR SHAFT
FLANGE FACE SHOULD BE
SQUARE WITH SHAFT TO
WITHIN
0.003
TIR
PILOT SHOULD BE CONCENTRIC TO BORE TO WITHIN
0.003
TIR
Fig. No.
10
10 of 10
Subject to change without prior notice
INSTALLATION OPERATION AND MAINTENANCE INSTRUCTIONS
VERTICAL TURBINE PUMP - NVT SERIES
Ref. No. NVT-IOM/2020/V.01
The horizontal drivers are mounted on the base frame while shipping from the factory. Use the lifting arrangement
shown in the Fig. No.
01
-a for hoisting the driver assembly. Lift the driver assembly and orient it so that the holes
in the base frame align with the foundation bolts. Lower the pump assembly until the bolts enter the holes in the base.
Fit shims to left and right of the foundation bolts, between the base frame and the foundation. If the shims are more
than
800
mm apart, position extra shims equal distant between them. Lower the hoist until the full weight of the
horizontal driver assembly is resting on the shims on the foundation.
Align the driver assembly using a precision spirit level (on the base frame) as shown in the Fig. No.
9
. All shims must
be perfectly flush and uniformly tighten up using securing means. Base plates have to be grouted with non-shrinking
mortar up to the upper edge of the frame after having been fixed in position.
Check flange bores and shaft diameters for proper fit. Clean all mating surfaces, bores and faces removing grease, oil,
dirt, nicks, paint and other contaminants to insure proper fit and function of mating parts. Companion flanges are
bored for a slip fit over driver and gear shafts.
Align flange key with shaft key and gently tap flange on to shaft with extreme care to avoid any damage for flange or
flange face. Tighten the set screw provided over keyway to lock flange into position.
Makes sure that the shaft at both driven end and driver end are not extended out beyond the flange face or pilot bore
boss. Check the run-out of flange face and pilot diameter. Ensure that the total indicated run out is below
0.003
" (see
Fig. No.
10
). In cases where fly wheel adapter disc is used for connecting drive shaft to diesel engines, instead of fitting
companion flanges on the stub shaft, this disc should be properly aligned and tightly bolted onto the engine flywheel.
5.5. Mounting Drive Shaft
