ProMinent Sigma 3 Basic Operating Instructions Manual page 53

Standard liquid ends:
Interval
Quarterly*
After approx. 4,000 oper‐
ating hours
After approx. 5000 oper‐
ating hours
After 18,000 operating
hours or 23,500 operating
hours (API)
Maintenance work
Check that the metering lines are tight at the liquid end and
n
check for leak-tightness.
Check that the suction valve and discharge valve are firmly fixed
n
in place and tightly sealed.
Check the leak-tightness of the entire liquid end - particularly
n
around the leakage hole!
With critical applications, check or replace the diaphragm at reg‐
Ä 'Check the condition of the metering dia‐
ular intervals - see
phragm' on page 54 .
Check that the dosing head screws are tight.
n
Check that the diaphragm rupture sensor is firmly seated.
n
Check whether the diaphragm rupture sensor stops the pump or
n
generates an alarm after it has been triggered.
Check that the flow is correct: Allow the pump to prime briefly.
n
Observe the maximum permissible operating pressure!
Check the oil level.
n
Check that the electrical connectors are intact.
n
Check the tight, clean electrical connection of the earthing wires.
n
Check the tight, clean electrical connection of the potential
n
equalisation wires.
Check the gear ring/DZ element of the coupling as per their oper‐
ating instructions.
Change gear oil - refer to "Changing gear oil" in this chapter.
Adhere to the motor manufacturer's recommendations - see oper‐
ating instructions for the motor.
After 40,000 h: The upper screw shaft bearing must be replaced for
ongoing ATEX use.
* Under normal loading (approx. 30% of continuous operation).
Under heavy loading (e.g. continuous operation, aggressive feed chemi‐
cals etc.): shorter intervals.
WARNING!
In the area at risk from explosion: stop the pump imme‐
diately and rectify these anomalies. ProMinent Service
may be needed if required.
Under heavy loading (e.g. continuous operation) shorter
maintenance intervals are recommended than those
given.
Third-party spare parts for the pumps may result in 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.
Maintenance
Personnel
Technical per‐
sonnel
Technical per‐
sonnel
Instructed per‐
sonnel
53