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6.2 Priming
6.3 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 dia‐
phragm 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 injuries.
Please ensure when handling hazardous substances
that you have read the latest safety data sheets pro‐
vided by the manufacture of the hazardous substance.
The actions required are described in the safety data
sheet. Check the safety data sheet regularly and
replace, if necessary, as the hazard potential of a sub‐
stance 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 associ‐
ated hazard assessment for the workstations 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
17
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