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11
PREVENTIVE MAINTENANCE
For pump reliability and efficiency, comply with maintenance
intervals as shown in the table.
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 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
Method for filling pump with anti-corrosion emulsion or anti-
freeze solution using an external diaphragm pump based on
the layout shown in par. 9.7 in Fig. 7:
•
In place of the service tank, use a suitable container
containing the solution to be pumped.
•
Close the filter drainage, if open.
•
Make sure that the hoses to be used are clean inside and
spread grease on their connections.
•
Connect the high pressure exhaust pipe to the pump.
•
Connect the suction pipe to the diaphragm pump.
•
Connect the suction pipe between the pump head and
the diaphragm pump.
•
Fill the service container with solution/emulsion.
•
Insert the free ends of the suction pipes and the high
pressure exhaust pipe inside the container.
•
Switch on the diaphragm pump.
•
Pump the emulsion until it exits from the high pressure
exhaust pipe.
•
Continue pumping for at least another minute.
•
Stop the pump and remove the previously connected pipes.
•
Clean, grease and plug the connections on the pump
head.
The characteristics of the emulsion can be strengthened if
necessary by adding, for example, Shell Donax.
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 run the pump
for any reason until the circuit has been fully
defrosted, in order to avoid serious damage to
the pump.
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:
Every 1000 hours
Change oil
Check / Replace:
Valves
Valve seats
Valve springs
15
Valve guides
Check / Replace:
H.P. seals
L.P. seals
31
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
5) defective installation
6) improper positioning or sizing of pipes
7) unauthorised design modifications
8) cavitation.
OPERATING FAULTS AND THEIR
POSSIBLE CAUSES
The pump does not produce any noise upon
start-up:
-
The pump is not primed and is running dry.
-
No suction water.
-
Valves are blocked.
-
The outlet line is closed and does not allow air
present in the pump head to come out.
The pump pulsates irregularly:
-
Air suction.
-
Insufficient supply.
-
Bends, elbow bends, fittings along the suction
line are choking the passage of liquid.
-
The suction filter is dirty or too small.
-
The booster pump, where installed, is supplying
insufficient pressure or flow rate.
-
The pump is not primed for insufficient head or
the outlet is closed during priming.
-
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).
-
The number of rpms is less than the nominal rate;
-
Excessive 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 water temperature.
The pressure supplied by the pump is insufficient:
-
Use (nozzle) 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.
The pump is overheated:
-
The pump is working in pressure excess or the
number of rpms is higher than the nominal rate.
-
Oil in the pump casing is not at level or not the
recommended type as detailed in chapter 7 (see
par. 7.6).
-
Excess belt tension or joint or pulley alignment is
incorrect.
-
Excessive pump tilt during operation.
Vibrations and shock to pipes:
-
Air suction.
-
Imperfect functioning of the pressure control valve.
-
Valve malfunction.
-
Non-uniformity in the transmission motion.
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