ProMinent Makro/ 5 Operating Instructions Manual page 34

Maintenance
Interval Maintenance work
Quarterly* EX pumps only: For special maintenance work see chapter "Important supplements for
metering pumps in hazardous locations" of the "General Operating Instructions for ProMi‐
nent
®
Check the tightening torques for the dosing head screws (1) (30 Nm) and the drive flange
screws (2) (25 Nm).
Check that the discharge valve and suction valve are correctly seated.
Check the correct seating and state of the metering lines at both discharge and suction
ends.
Check for firm seating of the diaphragm rupture sensor.
Check the tightness of the entire liquid end - particularly around the leakage hole!
Check the oil level.
Single head versions only: Check that the hole in the metal cap on the drive flange is
clear - see the figure in the "Safety Chapter".
Check that the electrical connections are intact
Check whether the pump is transporting media correctly - run briefly at high power.
Observe the maximum permissible operating pressure!
Check, whether moisture can be detected at the tube nozzle (3); if so a diaphragm rupture
has probably occurred.
Interval
After approx. 5,000 operating hours
After approx. 10,000 operating hours **
34
motor-driven metering pumps and hydraulic accessories"
Fig. 16: Liquid end
1 Dosing head screws
2 Drive flange screws
3 Tube nozzle
Maintenance work
Change the gear oil.
Replace the diaphragm - refer to the "Repair" chapter -
"Changing the diaphragm".
* Under normal loading (approx. 30 % of continuous operation)
Under heavy loading (e.g. continuous operation): Shorter intervals.
** under normal loading.
With very unfavourable metering parameters: Shorter intervals.
1
(30 Nm)
P_MAK_0040_SW
2
(25 Nm)
3