Tab. 2: "Maintenance" schedule for the metering system.
What?
Where?
Where described?
Metering pumps
Functional test
Daily inspection
Pump operating instruc‐
tions
Metering system operating
instructions
Inspection of the electrical connec‐
tions, mechanical intactness, secure
fixing and corrosion damage
Quarterly inspection
Check the starting torques of the
fixing bolts on the dosing head
24 hours after initial commissioning,
then quarterly or when the diaphragm
is replaced
Check and, if required, replace suc‐
tion and discharge valves
After 5,000 hours and/or as per the
information in the operating instruc‐
tions for the pump
Check and, if required, replace the
metering diaphragm
After 10,000 hours and/or as per the
information in the operating instruc‐
tions for the pump
Back pressure / relief valves
Functional test & diaphragm
replacement
Annually or in the event of a fault
Metering system operating
instructions
Multifunctional valve oper‐
ating instructions
Functional test
Weekly inspection
Metering system operating
instructions
Drip tray
Visual inspection for leak-tightness
and damage
Weekly inspection
Metering system operating
instructions
Leakage sensor (drip tray level switch)
Functional test
Annually and/or in line with the specifi‐
cations of the competent authority
Metering system operating
instructions
Threaded connectors and hose connectors
Check for secure fixing and leak-
tightness, tighten if required
Monthly inspection
Metering system operating
instructions
Pipework and hose lines
Visual inspection for leak-tightness
and damage / brittleness
Monthly inspection
Metering system operating
instructions
Maintenance and Troubleshooting
30