Basic Installation Notes - ProMinent MAKRO TZ Operating Instructions Manual

Route the leakage liquid drainage line

7.1.1 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 pressure.
– Protect the motor and gear of the system against posi‐
tive pressure using other mechanisms.
– Protect the system against illegal positive pressure using
other mechanisms.
– Precise metering is only possible when the back pres‐
sure 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.
The leaked liquid is drained off 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 components
Hydraulic components can rupture if the maximum permis‐
sible 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.
CAUTION!
Hazardous feed chemicals can escape
With hazardous feed chemicals: Hazardous feed chemical
can leak out when using conventional bleeding procedures
with metering pumps.
– Install a bleed line with a return into the storage tank.
Shorten the return line so that it does not dip into the feed chemical
in the storage tank.
Installation
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