Instruction Manual

5 Putting into operation
37 B-290 Operation Manual, Version I
5.8 Tubing installation
The Mini Spray Dryer B-290 needs compressed gas for the two-fluid nozzle and the nozzle cleaner
between 5 and 8 bar. Therefore, the air or nitrogen is connected on the rear of the instrument via a
quick coupling.
Fig. 5.13: Quick coupling rear side
The Mini Spray Dryer B-290 can be used in an open or closed mode. The open mode is set in the
suction mode as a standard. However, if the exhaust gas is aggressive and could lead to a cor ro sion
of the aspirator, the instrument can also be run in a pressure mode. This mode leads to a higher noise
emission.
NOTE
Risk of instrument malfunction when the instrument is operated with bent hoses.
• Always inspect the instrument for bends or kinks in hoses and eliminate them prior to operation.
• Exchange hoses with signs of mechanical stress such as small cracks and blind spots at the
surface immediately.
1
2
a Tubing between cyclone respectively filter and
aspirator
b Exhaust tube
Fig. 5.14: Open mode set-up in suction mode