Extractors acc. to Knöfler-Böhm, DURAN^® tubing

The condensate passes the extraction sample and flows back into the flask continuously without interrupting the extraction process, i.e. the solvent is recirculated continuously.
The complete apparatus consists of:
Jacketed extractor head made of DURAN^® tubing, Dimroth condenser with thread GL 14, made of DURAN^® tubing,
Round bottom flask material: DURAN^®