Third party spare parts for the pumps may lead to prob‐
lems when pumping.
–
Use only original spare parts.
–
Use the correct spare parts kits. If in doubt, refer to
the exploded views and ordering information on our
website www.prominent.com.
Interval Maintenance work Personnel
After approx. 5,000 oper‐
ating hours
Change gear oil - refer to "Changing gear oil" in this chapter. Instructed personnel
Quarterly Check the oil level.
Quarterly*
n Check that the metering lines are tight at the liquid end and
check for leak-tightness.
n Check that the suction valve and discharge valve are firmly fixed
in place.
n Check that the dosing head screws are tight.
n Check the condition of the metering diaphragm - see
Ä „Check
the condition of the metering diaphragm“ on page 71
.
n Check that the flow is correct: Allow the pump to prime briefly.
n Check that the electrical connections are intact.
Technical personnel
* Under normal loading (approx. 30% of continuous operation).
Under heavy loading (e.g. continuous operation, aggressive feed chemi‐
cals etc.): shorter intervals.
The diaphragm is a wearing part, the service life of which is dependent on
the following parameters:
n System back pressure
n Operating temperature
n Feed chemical properties
When using abrasive feed chemicals, the diaphragm service life is
reduced. In these cases, more frequent checking of the diaphragm is rec‐
ommended.
Data Value Unit
Tightening torque for screws: 7.5±0.5 Nm
WARNING!
Warning of eye injuries
When opening the relief valve, a spring under high ten‐
sion can jump out.
– Wear protective glasses.
Standard liquid ends:
Check the condition of the metering dia‐
phragm
Tightening torques
Liquid ends with integral relief valve
Maintenance
71
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