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The graph does not take into account pipe
resistance, valves, load loss produced by the length
of the ducts, the viscosity of the liquid pumped or
the temperature itself.
If necessary, contact our Technical or Customer
Service Departments.
10
START-UP AND OPERATION
10.1
Preliminary checks
Before start-up, ensure that:
The suction line is connected and pressurized
(see chapter 9): the pump must never run dry.
1. The suction line ensures a hermetic seal over time.
2. Any shut-off valves between the supply source and the
pump are fully open. The outlet line is free discharge, to
permit rapid expulsion of the air present in the pump
manifold and therefore facilitate fast priming.
3. All suction and outlet fittings and connections are
properly tightened.
4. The coupling tolerances on the pump/transmission
shaft (half-joint misalignment, Cardan joint angle, etc.)
remain within the limits required by the transmission
manufacturer.
5. Oil in the pump casing is at the required level, verified
with the level indicators at the sides of the casing (pos. ,
Fig. 8).
In case of prolonged storage or long-term
inactivity, check proper functioning of the
suction and outlet valves.
10.2
START UP
1. At first start-up, verify that the rotation direction and the
supply pressure are correct.
2. Start-up the pump without any load.
3. Check that the supply pressure is correct.
4. Check that the rotation rpm during operation does not
exceed the nominal rpm of the pump.
5. Let the pump run for a period of no less than 3 minutes,
before putting it under pressure.
6. Before each pump stop, reset pressure by means of the
control valve or with any relieving devices and reduce to a
minimum rpm (activation with combustion motors).
10.3
Seal packing cooling circuit
During operation, a certain amount of water coming from
the seal packing cooling circuit is discharged from the port 1
(Fig. 9).
The draining of this circuit must be sent back to the suction
line before the booster pump (Fig. 9), or to a tank for
collection.
11
PREVENTIVE MAINTENANCE
For pump reliability and efficiency, comply with maintenance
intervals as shown in the table below.
PREVENTIVE MAINTENANCE
Every 500 hours
Check oil level
12
PUMP STORAGE
12.1
Long-term inactivity
If the pump is started for the first time after a long
period of inactivity, before operation check the oil
level, inspect the valves as specified in chapter 10,
then follow described start-up procedures.
Fig. 8
23
Fig. 9
Every 1500 hours
Change oil
Check / Replace:
Valves
Valve seats
Valve springs
Check / Replace:
H.P. seals
L.P. seals
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