Xylem TVS - Manual (Page 36)

Installation, Operating and Maintenance Instruction
Model TVS
page 28
Maximum flows
The allowed operating range must comply with the
given of the order confirmation to secure trouble-free
operation. The maximum flow rates may not be
exceeded even temporarily. Otherwise damage may
be caused due to cavitation or reversal of the axial
thrust.
Installation position
Vertical and horizontal installation is allowed. The
maximum operating flow must be kept. The pump
design is with or without integrated non-return valve
(at vertical or horizontal installation).
Protection against running dry
The pumps must not run dry under any circumstances
(not even for a short time for the purpose of checking
the direction of rotation), since overheating can
damage
pump components. Therefore we
recommend monitoring the required minimum water
level in order to protect the pump.
Pump Backflow
It is not permissible to drain the pressure line after the
pump has been switched off as the backflow speed
can be many times the operating speed and would
destroy the unit. A backflow through the pump can be
prevented by suitable non-reflux fittings as close to the
pump as possible insofar as a non-return valve are not
installed in the pump.
2. Description
2.1 Models
TVS 8.*, 10.*, 12.*: Submersible pump for wells with
8“-12" bore.
Please see the Appendices for the sectional drawings
and index of parts for each pump.
The detailed designation of the pump is shown on the
pump nameplate ort he order confirmation.
2.2 Pipe Connection
Pipe Connection Internal thread
TVS 8.* Rp5 ÖNORM EN 10226
TVS 10.* Rp6 ÖNORM EN 10226
TVS 12.* API 8" NPT
Other pipe connections are executed optionally on
customer request and are seen in the order
confirmation.
2.3 Bearings
The pump shaft is maintained multiple in
maintenance-free plain bearings.
2.4 Motor
The motor of your pump has its own Operating
Instructions. It is vital that you read and comply
with the instructions and safety instructions
contained in them.
3. Transport, Handling, Storage
3.1 Transport, Handling
Check the pump/pump unit immediately upon
delivery/receipt of despatch for damage or missing
parts.
The pump/pump unit must be transported carefully
and by competent personnel. Avoid serious
impacts.
Keep the pump/pump unit in the same position in
which it was supplied from the factory. Take note
of the instructions on the packaging.
The intake and discharge side of the pump must
be closed with plugs during transport and storage.
Dispose of all packing materials in accordance
with local regulations.
Lifting aids (stacker, crane, crane mounting
device, lifting blocks, sling ropes, etc.) must have
the proper dimensions so that they can bear the
weight of the pump, motor and the pressure line
when it is full of water.
The pump/pump unit may only be lifted by solid
points. The following illustration shows the correct
method of carrying by crane.