Priming; Interrupting Operation - ProMinent Duodos 50 PPS Assembly And Operating Instructions Manual

7.2 Priming

7.3 Interrupting operation

1. To start the double diaphragm pump, open the air value by
approximately 1/2 to 3/4 of a turn
2.
Cavitation
If opening of the air valve causes the stroke
rate of the double diaphragm pump to
increase, but not however the flow volume
passing through the double diaphragm pump,
then cavitation is the cause. Slightly turn
back the air valve so that the air consumption
and feed rate of the double diaphragm pump
are set in an optimum ratio.
Once the double diaphragm pump is filled with water, open
the air valve further to set the required air flow.
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.
Rinse through the double diaphragm pump after every use if liquids
are used which when stationary have a tendency to form deposits
or to solidify. This avoids damage to the double diaphragm pump.
Liquid residues remaining in the double diaphragm pump may dry
out and form deposits. When restarting the double diaphragm
pump, this can lead to problems at the diaphragms and the ball
valves. At temperatures below 0 °C the double diaphragm pump
must always be completely drained.
Commissioning
19