CAUTION!
Warning against bursting of the suction or discharge lines
Tube lines with insufficient pressure rating may burst.
– Only use tube lines with the required pressure rating.
CAUTION!
Warning against lines disconnecting
If suction, discharge and relief lines are installed incorrectly,
they can loosen / disconnect from the pump connection.
– Only use original tubing with the specified tube diameter
and wall thickness.
– Only use clamp rings and tube nozzles that correspond
with the respective hose diameter.
– Always connect the lines without mechanical tension.
CAUTION!
Warning against leaks
Leaks can occur on the pump connection depending on the
insert used.
– The pump is supplied with PTFE moulded composite
seals with a flare, which are used for the pump connec‐
tions. They seal the connections between grooved pump
valves and the grooved inserts from ProMinent - see
Ä on page 31
.
– In the event that an unflared insert is used (e.g. third
party part), an elastomer flat seal must be used - see
Ä on page 31
.
Numerous installation instructions with drawings are con‐
tained in the "General Operating Instructions for ProMinent
®
motor-driven metering pumps and hydraulic accessories".
–
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.
CAUTION!
Warning of backflow
A back pressure valve, spring-loaded injection valve, relief
valve, foot valve or a liquid end do not represent absolutely
leak-tight closing elements.
– For this purpose use a shut-off valve, a solenoid valve or
a vacuum breaker.
CAUTION!
Warning of illegal operation
Observe the regulations that apply where the unit is to be
installed.
Fig. 16: Moulded composite seals with
corrugated insert
Fig. 17: Elastomer flat seal for a smooth
insert
Installation
32
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