BUCHI Inert Loop B-295 - Manual (Page 52)

6 Operation
52 B-290 Operation Manual, Version I
If the system is run with a PTFE filter, the fine particles can par tially be recovered by counter-pulsating
the filter membrane and blowing the particles away. For this purpose, proceed as follows:
Fig. 6.5: Recovering particles of the outlet filter
• Attach the PTFE membrane instead of the polyester filter and close the bottom with a polypro-
pylene plug.
• Separate the manometer tube from the filter and remove the filter housing completely from the
holder.
• Put the filter on the product feed table. Disconnect the nozzle cleaning tube from the nozzle and
connect it to the filter housing.
• Close the outlet gas connection with an SVL 42 screw cap.
• With the nozzle cleaning set on level 1, a pressure blow is generated every 5 seconds on the inner
side of the filter leading to a separation of the fines from the membrane. The particles fall into the
glass and can be recovered.