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ProMinent
®
10
Operation
10.1
Operation for SS version
Operate the metering pump at a stroke length of 100% and unpressurised metering line by
pneumatic control until the liquid end has been completely and bubble-free filled with the
medium. This is evidenced when the medium becomes visible in the venting or metering line or
if it discharges from the metering line.
Now connect the metering line to the metering valve.
10.2
Operation for PV version
Operate the metering pump at a stroke length of 100% and opened vent valve (9) by pneumatic
control until the liquid end has been completely and bubble-free filled with the medium. This is
evidenced when the medium becomes visible in the venting or metering line or if it discharges
from the metering line.
Close the vent valve (9) now.
In case slightly outgassing media, the fine venting can be permanently used for liquid ends with
vent valve (9):
For this purpose, remove the installed star handle (9a) and open the screw in the interior of the
vent valve (9) approx. 1 turn anti-clockwise.
9a
• This causes a constant partial flow of the metering volume returning to the store tank.
• The returned volume should amount to approx. 20% of the metering volume.
• The media must have a low viscosity and may not have any solids.
WARNING
The above mentioned measures guarantee no absolutely reliable metering after stop of the
pump!
A regular check is thus absolutely necessary!
9
Operation
Page 19
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