Instruction manual

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cannot be cleaned and will be exchanged if
they are soiled. In case of compressed air
counters with integrated measuring section
the "measuring device" cannot be removed.
For this reason an expensive bypass line is
necessary.
New. The design of VA 420 enables the
removal and cleaning of the "measuring
device" with e. g. soap water without any
dismounting of the measuring section.
A closing cap grants a continuous use
of the line for the duration of the cleaning.
A bypass line is not necessary.
The alignment pin grants an accurate
installation of the measuring device.
The approved consumption sensor VA 400
is available for pipe diameters of 2" to DN
300. Its constructively sophisticated design
enables the installation into pipes with
nominal diameters up to DN 300 even under
pressure. The installation is effected by
means of a standard ½" ball valve.
By means of quick couplings the com-
pressed air counter can be integrated
quickly into the feed hose of a machine.
During the shutdown of the machine it is
possible to determine the leak rate, the
actual consumption can be obtained when
the machine is running. The power supply
is effected via the power socket by means
of the mains unit. For data recording over
a longer period of time we recommend to
use the compressed air analyzer DS 300
mobile.
For stationary use there are the following
outputs available for the data transfer to a
building management system or PLC:
4…20 mA for actual consumption.
Pulse output (galvanically separated)
for the total consumption.
Removal of the measuring device without complete dismounting of the measuring section
Stationary use
Solution for large pipe diameters
Mobile use
In most cases the compressed air in not
free from oil, condensate, dirt and particles.
In the course of time this leads to a soiling
of the compressed air counters which may
cause errors in measurement or even a
total breakdown.
The compressed air counters which have
been on the market up to now generally
Installation Removal
Alignment pin
Cleaning
Consumption
4
3
2
1