EXPO ML576, Manual, Page: 5 / 12

ML576 | v2
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Expo Technologies UK
T: +44 (0) 20 8398 8011
E: sales@expoworldwide.com
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Expo Technologies China
T: +86 532 8906 9858
E: qingdao@expoworldwide.com
Oil Class 2
In each cubic metre of compressed air, not more than 0.1mg of oil is allowed. This is a total level for liquid oil,
oil aerosol and oil vapour.
When an inert gas is being used to supply the purge system, risk of asphyxiation exists. Refer to Application
Suitability section.
Before connection of the air supply to the purge system, the supply pipe work should be flushed through
with instrument quality air to remove any debris that may remain in the pipes. This must be carried out for at
least 10 seconds for every meter of supply pipe.
Unless a supply shut-off valve has been fitted to the air isolation unit
system, an external shut-off valve with
the same, or larger, thread size as the Control Unit inlet fitting should be fitted by the installer to prevent any
restriction of purge flow.
The purge air from the air isolation unit
should be piped within the pressurized enclosure to ensure
purging of potential dead air spots.
The purge system is fitted with an internal regulator factory set to 3 bar feeding the logic.
When an inert gas is being used to supply the air isolation unit, risk of asphyxiation exists. Refer to Application
Suitability section. Before connecting the air supply to the Air supply isolator, the supply pipe work should be
flushed through with instrument quality air to remove any debris that may remain in the pipes. This must be
carried out for at least 10 seconds for every metre of supply pipe.
Instrument Air Quality
Solid Particles 0.5 μm < particle size ≤ 1 μm, maximum 1000 particles / m3
Residual Water 1μm maximum density, +3
o C* pressure dewpoint
Oil Content ≤ 0.01 mg / m3 concentration total oil