6 | Software
Büchi Labortechnik AG
50/62
Operation Manual Sepiatec SFC-250
In the first cylinder of the recycling module dissolved modifier can condense. The
liquid collects at the bottom of the cylinder, where a valve-sensor-valve combination
is installed. When the sensor detects liquid, the upper valve is closed and the lower
valve is opened to drain the condensate.
Due to the recycling module, the gas-liquid separators (GLS) are also under pressure.
The fractionated liquid is fed to the recycling module via pressure-stable flexible
lines. A valve-storage tube-valve combination is available for each of the ten GLS.
When a GLS is switched active for fractionation in the software, the upper valve
(fraction valve in) opens and the storage tube fills with the fractionated liquid. The
software uses the flow rate of the modifier pump to calculate how long the valve can
remain open and when it is full. It will close and open the lower valve (fraction valve
out) to transfer the fractionated liquid to the collection container.
