Basic Installation Notes - ProMinent Makro TZ Operating Instructions Manual

Diaphragm rupture indicator
Route the leakage liquid drainage line

7.2 Basic installation notes

Safety notes
CAUTION!
Danger due to incorrect use of the safety relief
valve
The safety relief valve can only protect the motor
and the gear, only against illegal positive pressure
that is monitored by the metering pump itself. It
cannot protect the system against positive pres‐
sure.
– Protect the motor and gear of the system
against positive pressure using other mecha‐
nisms.
– Protect the system against illegal positive pres‐
sure using other mechanisms.
Precise metering is only possible when the
–
back pressure is maintained above 1 bar at all
times.
If metering at atmospheric pressure, a back
–
pressure valve should be used to create a back
pressure of approx. 1.5 bar.
CAUTION!
Warning of unnoticed diaphragm rupture
Only above approximately 2 bar system back pres‐
sure is a signal generated in the event of the rup‐
ture of a diaphragm.
– Only rely on the diaphragm rupture indicator
with back pressures of greater than 2 bar.
Or install a back pressure valve and set it to a
minimum of 2 bar – if the installation permits
this.
Drain off the leakage liquid via the flushing collar and a hose
nozzle, without other parts of the liquid end coming into contact
with the medium.
1. Connect a hose to the lower hose nozzle.
2. Route the hose into a collection vessel for the leakage liquid.
CAUTION!
Danger resulting from rupturing hydraulic compo‐
nents
Hydraulic components can rupture if the maximum
permissible operating pressure is exceeded.
– Never allow the metering pump to run against
a closed shut-off device.
– With metering pumps without integral relief
valve: Install a relief valve in the discharge line.
Installation
37