Replacing The Diaphragm - ProMinent MAKRO TZ Operating Instructions Manual

Repairs
11.1

Replacing the diaphragm

38
CAUTION!
Warning of feed chemical spraying around
Feed chemical can spray out of the hydraulic components 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 unauthor‐
ised persons.
– Depressurise the system before commencing any work
on hydraulic parts.
1. Flush the suction line, discharge lines and liquid end (activate
flushing equipment 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 being switched back on.
5. If the liquid end has not been flushed according to the above pro‐
cesses, then protect yourself against the feed chemical - protective
clothing, safety glasses, ... .
After dismantling immediately place parts that have been wetting
with the medium in a trough with a suitable medium for flushing, in
dangerous media were used flush and rinse thoroughly.
6. Unscrew the hydraulic connectors on the discharge and suction
side.