Fig. No.
03
horizontal driver foundation
vt pump foundation
base frame
mounting flange
dia. - ref. catalogue
ø20 (4 nos.)
5 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
5.2. Mounting the pump
Pumps are usually supplied assembled. First clean the discharge head base mounting flange. Inspect the concrete
foundation for dust, dirt, oil, chips water etc. and remove any contaminants. Refer grout manufacturer’s instructions
for cleaning and follow the same. Remove water and/or debris from anchor bolt holes/sleeves also. When using sleeve
type bolts fill the sleeves with packing or rags to prevent grout from entering it.
Fit shackles on the lifting lugs with bolts. Sling through the shackles and hoist the pump into position over foundation.
Shackles and slings should be rated to handle in excess of the pump weight. Lower the pump assembly carefully until
the discharge head is just above the foundation bolts and guide it so that it doesn’t strike the sides of the concrete
foundation opening. Orient the pump so that the discharge nozzle is in the right direction and the holes in the base
provide permanent and rigid support to the entire pump. Foundation area should have adequate space for future
inspection and maintenance activities and should be sufficient enough to provide a solid footing. The foundation must
be capable of absorbing any vibration, normal strain or shock. It should have enough strength to support the complete
weight of the pump including driver related components and weight of the water passing through the pump during
operation.
As a rule of thumb, the weight of the raised concrete foundation should be
2
.
5
times the total weight of these components.
If structural foundations are provided instead of concrete foundation then it should be constructed properly after a
detailed structural strength analysis. The concrete foundation must have an absolutely level and even surface. Make sure
the concrete foundation has set before mounting the pump discharge head and driver base frame by allowing a curing
time of at least
48
hours.
The raised concrete base should be
200
mm larger than the mounting flange and driver base frame on all sides. (See Fig.
Nos.
02
and
03
). Pipe sleeves of the foundation bolt should be
2
.
5
times the bolt diameter embedded in the concrete.
Foundation bolt locations should be exactly as shown on the assembly drawing (showing pump, gearbox, drive shaft,
location of bolt holes for discharge head mounting flange and driver base frame) provided by manufacturer.
