Salvatore Robuschi RD-RDL-RDM Instructions Pour L'utilisation page 5

Base plate
The pump, which is supplied with motor coupling and base plate, is
assembled in our company with the outmost care. Before the final
installation, it is necessary to check that no damage occurred in
transit. The pump has to be entrusted for connection by skilled staff:
a defective connection can cause operation accidents and a
premature pump's wear.
Foundation
The foundation has to be strong and rigid enough to damp vibrations
and hold the unit's alignment, which is usually obtained by means of
a concrete foundation, equipped with small wells (fig.4), where
foundation bolts are to be inserted and covered with final concrete
cast . Place the unit on the foundation and fit some shims close to the
foundation bolts, so that the group lies in an horizontal position,
checking with a water level on the shaft and delivery flange. Cast the
cement and when it has hardened (at least after 48 hours), tighten
the foundation bolts.
Aligning the pump-motor
Remove the coupling protection and unscrew the screws of the
support foot to avoid any stress or shifts of the axis' height. Use a
thickness gauge or comparator to check the angular alignment, then
make sure that the distance between the semi-couplings is the same
along the whole periphery. Then check the parallel alignment with a
ruler or comparator. The unit is aligned only when the distance
between each shaft and the ruler, placed on the coupling, is the same
looking from each of 4 diametrically opposed points. The maximum
axial and radial deviation between the two semi-couplings cannot
exceed 0,1 mm. (fig. 2) For any correction, loosen or take off the
screws, where required, in order to move the feet on the base and, if
it is necessary, fit additional calibrated steels or wash.
a
b
a
b
Fig. 2 Coupling alignment
The coupling cannot offset eventual assembly irregularities
of the group, but it has the unique function of transmitting
torque to the pump.
Suction and delivery pipes.
The suction pipe, whose internal diameter should never be smaller
than the suction port, should be arranged in accordance with the
suction conditions and consider
characteristics. Make sure that connections in the suction pipe are
perfectly airtight. Moreover, the suction pipe, in the horizontal
sections must have a positive slope towards the pump to avoid that
air pockets occur inside the pipeline.
Should the pump run with a positive slope, pipe is descendant
towards the pump.
Should the pump run with a negative slope in the suction pump,
install a foot valve at the end of the pipe, to allow and keep priming of
the pump.
Fit a check-valve in the delivery pipe to protect the pump from too
high counterpressures or reverse rotation (after each stop).
Pipe clamping.
Suction and delivery pipes have to be supported aside from the
pump, but as close to it as possible. Be sure that pipes are installed
to allow the perfect mating of flanges and counterflanges, avoiding
stress transmission to the pump. A compensation bellows is also
necessary to absorb expansions caused by hot liquids. (see fig.4)
Fig.4 Pipe clamping
Checking.
For a constant and efficient check, install a gauge on the discharge
pipe and a vacuum gauge on the suction pipe.
Pipette
Glass bulb
Fig.3: Oiler
product and temperature's
Electrical connection.
Electrical connection must be carried out by a qualified electrician in
accordance with local regulation. Make sure that the supply voltage
corresponds to the voltage on the motor plate. It will be the local
responsible' s task to make sure earthing is carried out first and all
the installation operations are performed in compliance with the
applicable regulation.
Provide a device to disconnect each phase from the supply with a
break of 3mm between the contacts in the open position.
Regarding motor protection, install a switch or a thermal relay for the
current indicated on the motor plate, plus 5%.
Coupling guard.
According to the security rules, pumps can work only if the coupling is
correctly protected. If not included in the supply, it must be installed
by the final user.
3. OPERATION
a) Check that the pump rotates freely by hand.
b) Check the direction of rotation shown on the pump.
c) Grease lubricated bearings:
- when bearings are ready for the delivery are preliminarily greased
with high quality grease.
d) Oil lubricated bearings:
- pumps are delivered without any oil, therefore, before starting, it is
necessary to fill the bearing housing. Oil is checked by the level rod
which bears the highest-lowest notches.
- Turn over the glass bulb and pour oil into the pipette until it reaches
the level as indicated in the fig. 3: fill the glass bulb and put it into the
vertical position. Check that the level of the glass bulb remains
constant. The types of oil indicated in tab.1 are valid for temperatures
between -10° and 120°C.
e) Auxiliary fittings: connect, where necessary, flowing-, barring-
heating- or cooling- pipes.
(Exec. A plan 32) Single mechanical seal with throat bushing.
If the stuffing box is not connected to the pump casing, flow the
mechanical seal with a consistent liquid at a pressure higher than that
inside the stuffing box.
Place a regulation valve at the inlet of the stuffing box.
(Exec. A plan 02) Single mechanical seal with throat bushing
and plug.
Before starting the pump, unscrew the plug 903.5 to bleed the air
(Exec. B) Packing gland
Let the mechanical seal drop
(Esec. C) Double back-to-back mounting.
It is suitable for adhesive and hot liquids, with a tendency to form
crystals, gas etc. Through this mounting, contact is avoided between
the spring and the pumped liquid. Washing and cooling are obtained
through the circulation of an auxiliary liquid (compatible with the
sealed liquid); this liquid must be at a pressure of at least 0,5 Bar
higher than the existent one in the pump's casing.
(Exec. F) Fluxed packing gland
Connect the flux line with an external net
(Exec. E plan 32) Simple mechanical seal.
Flush the seal with compatible liquid with a pressure higher than the
one in the stuffing box
(Exec. H) Heating cooling chamber.
Connect the chamber to the heating or cooling auxiliary circuit, with a
max pressure of 5 bar
(L exec.) Double in series mounting. Double in series mounting is
needed when cooling liquid and washing under pressure are not
available. With this mounting the sealed liquid can vary in pressure
from the auxiliary one independently, whose pressure must be
between 0,1 and 0,3 bar.
If the pump is supposed to work with cold, warm or
dangerous liquid, cautions have to be kept to prevent any
possible accident
4. STARTING
1. Do not run the pump dry.
2. Start the pump only after filling completely with liquid through the
hole designed for this purpose (replace threaded plug after each
operation). When operating with positive suction head, fill the pump
by gradually and completely opening the inflow gate valve, while
keeping open the delivery gate valve to release air. Close completely
the delivery gate valve and check the suction head's pressure to
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