Pratissoli MW Serie Manuel D'utilisation Et D'entretien page 54

VALVE CLOSED - SAFETY DEVICE
WORK POSITION - RELEASE
10.2 Start-up
1. At first start-up, verify that the rotation direction is correct.
2. Check the pump is fed correctly.
3. Start-up the pump without any load.
4. Check that the rotation rpm during operation does not
exceed the nominal rpm of the pump.
5. Let the pump run for a time 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.
Should there be any priming trouble due to
insufficient supply, it is possible to remove the
three plugs in front of the head as shown in pos.
ƒ Fig. 11 and Fig. 11/a.
Fig. 9
11
VALVE OPEN - REST
For pump reliability and efficiency, comply with maintenance
POSITION -
intervals as shown in the table below.
Every 500 hours
Fig. 10
* To replace, follow instructions contained in the repair
manual.
12
12.1
Method for filling pump with anti-corrosion emulsion or anti-
freeze solution using an external diaphragm pump based on
the layouts shown in par. 9.7:
a) Close the filter drainage, if open.
b) Make sure the connecting pipe is clean, spread with grease
and connect them to the high pressure discharge.
c) Fix the suction pipe to the diaphragm pump, open the
pump suction connection and attach the pipe between it
and the diaphragm pump.
Fig. 11
d) Fill the container with solution/emulsion.
e) Insert the free ends of the suction pipe and the high
pressure exhaust pipe inside the container.
f ) Switch on the diaphragm pump.
g) Pump the emulsion until it exits from the high pressure
exhaust pipe.
h) Continue pumping for at least another minute. The
emulsion can be strengthened if necessary by adding Shell
Donax for example to the solution.
i) Stop the pump, remove the pipe from the suction
connection and close with a plug
54
PREVENTIVE MAINTENANCE
PREVENTIVE MAINTENANCE
Every 1500 hours
Check oil level
Check / Replace*:
Check / Replace*:
ATTENTION: On pumps without a reduction
unit, replace the bearings and the
corresponding seal rings every 7000
hours of operation.
On pumps with a reduction unit,
replace all the bearings and the
corresponding seal rings every
10000 hours of operation.
Perform periodical checks on cleaning and
maintenance on the pump. See the "ATEX
EXPLOSION PROTECTION" manual.
PUMP STORAGE
Method for filling pump with anti-corrosion
emulsion or anti-freeze solution
Fig. 11/a
Change oil
Valves
Valve seats
Valve springs
Valve guides
H.P. seals
L.P. seals