Maintenance Of The Double Diaphragm Pump; Troubleshooting - ProMinent Duodos 50 PPS Assembly And Operating Instructions Manual

Maintenance of the double diaphragm pump

8 Maintenance of the double diaphragm pump

8.1 Troubleshooting

The pump is not working.
Cause:
The outlet valve on the discharge side is not
open.
No air supply.
The air pressure is too low.
Air is escaping from the connecting elements.
The air lines or additional equipment are
blocked with foreign bodies.
The outlet opening (silencer) of the pump is
blocked with foreign bodies.
The liquid line is blocked with foreign bodies.
The pump is blocked with foreign bodies.
20
User qualification, maintenance: instructed persons
n
2.2 'User qualification' on page 7
WARNING!
Danger from hazardous substances!
Possible consequence: Fatal or very serious inju‐
ries.
Please ensure when handling hazardous sub‐
stances that you have read the latest safety data
sheets provided by the manufacture of the haz‐
ardous substance. The actions required are
described in the safety data sheet. Check the
safety data sheet regularly and replace, if neces‐
sary, as the hazard potential of a substance can be
re-evaluated at any time based on new findings.
The system operator is responsible for ensuring
that these safety data sheets are available and that
they are kept up to date, as well as for producing
an associated hazard assessment for the worksta‐
tions affected.
Before all work
Before all work on the double diaphragm pump,
disconnect the double diaphragm pump from the
compressed air supply and the feed and discharge
lines, vent and decontaminate. Always observe the
safety data sheet for the chemicals to be con‐
veyed.
Recommended measure:
Open the discharge valve on the discharge side.
Switch on the compressor and open the air valve and the
air regulator.
Check the compressor and the configuration of the air
line.
Check the connecting elements and the torque of the
screws.
Check and clean the air line.
Check and clean the outlet opening and the silencer.
Check and clean the liquid line.
Remove, check and clean the pump housing.
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