Pump Storage; Method For Filling Pump With Anti-Corrosion Emulsion Or Anti-Freeze Solution; Pipes; Precautions Against Frost - Pratissoli MK-MKS Serie Manual De Uso Y Mantenimiento

12

PUMP STORAGE

12.1 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 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.
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
j) Remove the hose from the high pressure exhaust. Clean,
grease and plug both pipe connections.
12.2

Pipes

a) Before greasing and protecting pipes according to
previously described procedure, dry connections with
compressed air.
b) Cover with polyethylene.
c) Do not wind too tight, ensure that there are no folds.
13

PRECAUTIONS AGAINST FROST

Follow the instructions in Chapter 12 in areas and
times of the year at risk of frost (see par. 12.1).
In the presence of ice, do not start the pump
for any reason until the circuit has been fully
defrosted, otherwise there can be 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:
1) improper use
2) failure to follow maintenance instructions
3) any use different from that described in the operating
instructions
4) insufficient flow rate
5) defective installation
6) improper positioning or sizing of pipes
7) unauthorised design modifications
8) cavitation.
15 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).
- 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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