Repair; Diaphragm Liquid End (Tzmb And Tzma) - ProMinent Makro TZ Operating Instructions Manual

Repair

Page 30
11 Repair
WARNING
• EX pump only: Always observe the "Important supplements for dosing pumps in EX
areas" section of the "General Operating Instruction for ProMinent
Metering Pumps and Hydraulic Accessories"!
• Protect yourself against hazardous feed chemicals.
• Always depressurise the suction and discharge lines before working on the pump!
• Always empty the liquid end and rinse before starting maintenance and repair work if
using dangerous or unknown media.
• Always wear suitable protective equipment to work on the liquid end when the pump has
been used with hazardous or unknown media.
• Isolate the supply before working on the motor and secure it against unauthorised
reconnection!
If an external fan, speed control or diaphragm rupture sensor are provided, isolate these
as well!
Check that no voltage is present!
11.1

Diaphragm liquid end (TZMb and TZMa)

Rinse out the feed line, suction line - and the liquid end (activate flushing assembly or immerse
in a suitable medium and pump for a while (remember to check that the medium is suitable
for your system) or proceed as follows):
Set the stroke length to 0 % while the pump is running.
Stop the pump.
WARNING
• Ensure that the pump cannot be switched on again.
• If the liquid end has not been rinsed out using one of the above methods you should
take suitable precautions to protect yourself from the feed chemical (protective goggles,
clothing . . . ) and immerse the parts in contact with the feed chemical immediately after
dismantling into a trough containing a suitable rinse aid (rinse thoroughly in the case of
hazardous media).
1
2
3
4
Fig. 20
9 8
7
6
1 Liquid end
2 Diaphragm
3 Armour plate
4 Screw
5 Leakage hole
6 Push rod
7 Screw fastener
8 Lantern
9 Head washer
5
®
Motor-Driven
ProMinent ®