Buchi Nano B-90, Руководство по эксплуатации, Страница: 52 / 104

5 Putting into operation
52
B-90 Operation Manual, Version B
5.6.1 ‘open loop’ air supply configuration
In ‘open loop’, compressed air or the Aspirator in blowing mode with inlet filter is required to establish
the necessary drying gas overpressure. To ensure the optimal drying air performance in this opera-
tion mode, the supplied air has to be dry and free of impurities. If this can not be guaranteed, BUCHI
recommends the use of a Wilkerson air maintenance unit (see next picture).
When working with pressurized gases:
• Turn off the pressure source and remove the power cord before installation work.
• Depressurize all system parts and supply tubes.
NOTE
If there is no compressed air available, the compressed air can also be supplied by an oil-free
compressor.
a b c
a
Coarse filter
b
Submicron filter
c
Activated charcoal filter
The optional Wilkerson air unit is to be installed be-
tween a compressed air source and the Nano Spray
Dryer B-90 air inlet. For installation, see documentation
of the Wilkerson air maintenance unit!
a
b
c
The drying air connection is located on the right side of
the instrument (see section 4.10 for details). The con-
nections are made via Polypress and Solaflex tubing
in combination with clamp fittings. Any exhaust gases
must be safely withdrawn (e.g. through a fume hood).
a
GAS OUT (Polypress with clamp fitting)
b
GAS IN (Polypress/Solaflex with clamp fitting)
c
Flow regulation valve (only necessary with direct
compressed air supply)