Replacing The Diaphragm - ProMinent Makro TZ Operating Instructions Manual

Repairs
10.1

Replacing the diaphragm

Important note
58
WARNING!
Warning of hazardous feed chemical
Should a dangerous feed chemical be used: it may
escape from the hydraulic components when
working on the pump, material failure or incorrect
handling of the pump.
– Take appropriate protective measures before
working on the pump (e.g. safety glasses,
safety gloves, ...). Adhere to the material safety
data sheet for the feed chemical.
– Drain and flush the liquid end before working
on the pump.
CAUTION!
Warning of feed chemical spraying around
Feed chemical can spray out of the hydraulic com‐
ponents if they are manipulated or opened due to
pressure in the liquid end and adjacent parts of the
system.
– Disconnect the pump from the mains power
supply and ensure that it cannot be switched
on again by unauthorised persons.
– Depressurise the system before commencing
any work on hydraulic parts.
CAUTION!
A diaphragm rupture may remain unnoticed
Should the multi-layer diaphragm be handled
incorrectly, the diaphragm rupture warning system
may fail.
– Take the multi-layer diaphragm from the pack‐
aging immediately before installing it.
– Do not allow dirt to come into contact with the
multi-layer diaphragm.
– Do not "inspect" the insert discs.
1. Flush the suction line, discharge line and liquid end (activate
flushing assembly or immerse suction lance in a suitable
medium and pump for a while (consider the effect of the
medium on your system first!)) or proceed as described
below.
2. Set the stroke length to 0% stroke with the pump running.
3. Switch off the pump.
4. Secure the pump to prevent it from being switched back on.