Third-party spare parts for the pumps may lead to prob‐
lems when pumping.
–
Only use original spare parts.
–
Use the correct spare parts kits. In the event of
doubt, refer to the exploded views and ordering
information in the appendix.
Interval
Maintenance work
Personnel
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
tion of the metering diaphragm’ on page 68
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 torques for dosing head
screws:
4.5 ... 5.0 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
68
Summary of Contents for Sigma 1 S1Cb
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