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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.
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
make sure the maximum final pressure is not higher than the one
tolerated by the pump.
3. If the pump is supplied with a packing gland, check that the gland
exerts the right pressure against the seal rings. In case of
mechanicals seals, check that the cover is perfectly closed against
the casing. Open the washing liquid's feeding of the packing or of the
mechanical seal and regulate the flow.
4. If seal chamber's cooling is provided, open the feeding of the
cooling water, regulating its circulation.
5. When the pump is provided with steam preheating chambers, the
steam must flow in from the upper connections.
6. Start the pump with the delivery gate valve closed. Then open
slowly the discharge gate valve, regulating the working point within
the limits indicated on the plate. Make sure the rotation's direction is
the one shown by the arrow on the pump casing. If rotation is in the
opposite direction, reverse the connections of two phases.
Stopping the pump.
Close the delivery gate valve, if a check valve is not fitted.
Close the suction gate valve, if a check valve is not fitted
Switch off the motor.
5. PERIODICAL CHECKS AND MAINTENANCE
Caution: disconnect the electrical power before any
servicing operation.
Make sure the pump works in conformity with the range of specified
performance levels and the absorbed current indicated on the plate is
not exceeded.
Pumps with mechanical seal.
Mechanical seals do not require maintenance. Except for possible
initial leak after the first stat-up, the mechanical seal on the shaft
must function without any loss of liquid. Do not run the pump dry.
When a leak occurs and increases gradually, the seal must be
replaced.
Packing gland.
Pumps with packing glands need a little dripping.
When dripping through the stuffing box becomes excessive and it
cannot tighten any further, change the seal rings. (see fig. 5 and tab.
3).
Bearing.
Pumps are delivered without oil, therefore, before starting, it is
necessary to fill the bearing housing (see tab. 1).
About every 3000 working hours, remove ball bearing oil.
To choose oil viscosity follow tab. 1.
For grease lubrication follow tab. 2.
Liquid temp.
Viscosity cSt
-10+50°C
10+70°C
70+120°C
Tab.1 Oil characteristics
Typ
Grease
Typ
e
[g]
e
6305
5
-
6307
10
3307
6310
15
3310
6313
20
3313
Tab. 2 Grease characteristics
6. DISASSEMBLY AND REASSEMBLY
Before disassembling, close the suction and delivery gate valves.
See the sectional assembly drawing.
When
working
with
warnings.
5
Suggested oil type
AGIP - OSSO, ESSO - TERESSO
22
IP - HYDRUS, SHELL - TELLUS
32
MOBIL - D.T.E.
68
Grease
N.L.G.
Suggested grease
[g]
I.
-
3
ESSO – BEACON EP2
15
3
MOBIL – MOBILUX EP2
25
3
SHELL – ALVANIA EP
30
3
dangerous
liquids,
follow
type
GREASER
the
due
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