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11
PREVENTIVE MAINTENANCE
For pump reliability and efficiency, comply with maintenance
intervals as shown in the table of Fig. 14.
Many applications will require changes at the frequency
shown in the table due to severe and unusual operating
conditions.
PREVENTIVE MAINTENANCE
Every 100 hours
Check oil level
If the pump is temporarily not going to be
used, in order to prevent stiffening or corrosion
caused by the fluids being pumped, it is strongly
recommended to flush all the components inside
the head.
To increase the component life of hydraulic parts,
wash the parts with fresh water at the end of the
working day
12
PUMP STORAGE
12.1
Long-term inactivity
If the pump is started for the first time after a long
period from the date of shipment, before operation
check the oil level, inspect the valves as specified
in chapter 10, then follow described start-up
procedures.
12.2
Method for filling pump with anti-corrosion
emulsion or anti-freeze solution
a) Make sure the connecting pipe is clean.
b) Fix the suction pipe to the diaphragm pump, open the
pump suction connection and attach the pipe between it
and the diaphragm pump.
c) Fill the container with solution / emulsion.
d) Insert the free ends of the suction pipe and the high
pressure exhaust pipe inside the container.
e) Switch on the diaphragm pump.
f ) Pump the emulsion until it exits from the high pressure
exhaust pipe.
g) Continue pumping for at least another minute.
The emulsion can be strengthened if necessary by adding
Shell Donax for example to the solution.
h) Stop the pump, remove the pipe from the suction
connection and close with a plug.
i)
Remove the hose from the high pressure exhaust.
Clean and grease and plug both pipe connections.
13
PRECAUTIONS AGAINST FROST
Follow the instructions in Chapter 12 in areas and
times of the year at risk of frost (see par. 12.2).
In the presence of ice, do not start the pump
for any reason until the circuit has been fully
defrosted, in order to avoid serious damage to
the pump.
Every 300 - 500 hours
Change oil
Check / Replace:
Balls
Valve housings
Check / Replace:
H.P. seal
Wiper ring
Fig. 14
29
14
GUARANTEE CONDITIONS
The guarantee period and conditions are contained in the
purchase agreement.
The guarantee will in any case be invalidated if:
a) The pump is used for purposes other than for those agreed
upon.
b) The pump is fitted with an electric or combustion motor
with performance exceeding those indicated in the table.
c) Safety devices are decalibrated or disconnected.
d) The pump is used with accessories or parts not supplied
by Interpump Group.
e) Damage has been caused by:
1) improper use
2) failure to follow maintenance instructions
3) any use different from that described in the operating
instructions
4) lack of sufficient flow rate (suction)
5) defective installation
6) improper positioning or sizing of pipes
7) unauthorized design modifications
8) cavitation.
15
OPERATING FAULTS AND THEIR
POSSIBLE CAUSES
The pump does not prime upon start-up:
-
The pump is not primed and is running dry,
rpm too high - see graph in par. 9.8.
-
No suction bentonite.
-
Valves are blocked.
-
Outlet line is closed and thus prevents the
release of air trapped in the pump manifold.
Pump pulsates irregularly:
-
Air suction.
-
Insufficient supply.
-
Bends, elbow bends, fittings along the suction
line are choking the passage of liquid.
-
The pump is not primed for insufficient head.
-
The pump is not primed due to valve jamming.
-
Worn valves.
-
Worn pressure seals.
-
Imperfect functioning of the pressure control
valve.
-
Problems on the transmission.
The pump does not supply the nominal flow rate/
excessive noise:
-
Insufficient supply (see various causes as above).
-
Rpm lower than the nominal speed;
-
Excessive internal leakage of the pressure control
valve.
-
Worn valves.
-
Excessive leakage of the pressure seals.
-
Cavitation due to:
1) Improper sizing of suction ducts/undersized
diameters.
2) Insufficient flow rate.
3) High fluid temperature.
The pressure supplied by the pump is insufficient:
-
Use is or has become higher than the capacity of
the pump.
-
The number of rpms is insufficient.
-
Excessive leakage of the pressure seals.
-
Imperfect functioning of the pressure control
valve.
-
Worn valves.
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