DL series multi-layer filter DL series multi-layer filter1, This machine fits to distill, sterilize, ... with density below 50%, low glutinosity, with little impurities.2, It adopts pressure-closed sterilization, with little sterilizing ... fit to production, so to ensure one machine with multi-function, and wide usage.4,,The filter board ... used in pharmacy and food industry. DL series multi-layer filter