Operating instructions
CAUTION!
Warning against the discharge line bursting
With a closed discharge line (e.g. due to a clogged discharge
line or by closing a valve), the pressure that the metering
pump generates can reach several times the permissible
pressure of the system or the metering pump. This could
lead to lines bursting resulting in dangerous consequences
with aggressive or toxic feed chemicals.
– Install a relief valve that limits the pressure of the pump
to the maximum permissible operating pressure of the
system.
CAUTION!
Warning against bursting of the suction or discharge lines
Hose lines with insufficient pressure rating may burst.
– Only use hose lines with the required pressure rating.
CAUTION!
Warning against lines disconnecting
With suction, discharge and relief lines installed incorrectly
can loosen / disconnect from the pump connection.
– Only use original hoses with the specified hose diameter
and wall thickness.
– Only use clamping rings and hose nozzles that corre‐
spond 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
Fig. 15.
– In the event that an unflared insert is used (e.g. third
party part), an elastomer flat seal must be used - see
Fig. 16.
Numerous installation instructions with drawings are con‐
tained in the "General Operating Instructions for ProMinent
®
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.
P_SI_0021
Fig. 15: Moulded composite seals with
corrugated insert
P_SI_0022
Fig. 16: Elastomer flat seal with an insert
without flare
Installation
24