ProMinent Makro TZ Operating Instructions Manual page 27

Every 3 months: • On diaphragm liquid ends (TZMb and TZMa) (see Fig. 16):
ProMinent ®
• Always wear suitable protective clothing to work on the liquid end when the pump has
been used with hazardous or unknown media.
• Metering pumps and their periphery must be maintained by qualified or authorised
personnel.
• Read the safety guidelines in the operating instruction manual before working on the
motor.
• Always disconnect external fans, stroke positioning motor or auxiliary equipment where
present.
Check that the power is disconnected.
• Ensure that the pump cannot be switched on by unauthorized personnel while
maintenance or repair work is being carried out.
IMPORTANT
Always stock spare parts kits for maintenance work.
(Order numbers in "Technical data" under "Spare parts kits"! )
Services
check the tightening torque of the dosing head bolts (1) (30 Nm) and the drive flange bolts (2)
(25 Nm)
• On hydraulic diaphragm liquid ends (TZHa) (see Fig. 17):
check the tightening torque of the dosing head bolts (1) (30 Nm) and the spacer flange bolts
(2) (25 Nm)
• On piston liquid ends (TZKa) (see Fig. 18):
check the tightening torque of the dosing head flange bolts (1) (15 Nm) and the spacer flange
bolts (2) (25 Nm)
• Check that the discharge valve and the suction valve are firmly seated
• Check that the diaphragm rupture sensor is firmly seated
• Check that the dosing lines (suction and discharge sides) are firmly seated
• Check the oil level
• Check that the pump is pumping correctly (let it run at high power for a short period but bear
in mind the max. permissible operating pressure!)
• On diaphragm liquid ends (TZMb and TZMa), check whether any moisture is evident at the
leakage hole (3) (if moisture is present, there is probably a diaphragm rupture).
• On piston liquid ends (TZKa), check whether the leakage rate is acceptable (10 to 12 drops/min).
Under onerous duty conditions (e.g. continuous operation), shorter maintenance intervals are
recommended.
Maintenance
Page 27