Product Overview BEKO DRYPOINT M membrane dryer, part number 4005345 – type DM 08 G29. Membrane Drying Without Electricity DRYPOINT M membrane dryers dry compressed air at the point of use without electricity, refrigerant or condensate. A hollow-fibre membrane separates the moisture, and a small purge-air stream carries it away. The compact design fits anywhere and requires no drain connection. Typical Applications Point-of-use drying for pneumatic control, instrument air,