6500 Series Purge and Pressurization System
I/O Manual
36
Dilution applications can only be considered with the normal and abnormal leakage rates known, which
applications. In most cases, explosive liquids are not allowed and unlimited releases may require the
protective gas supply to be inert gas only.
The following example explains the dilution area and how potential leak points in the containment system
can affect the positioning of equipment. It is suggested that any equipment that needs to operate in the
enclosure that is an ignition capable apparatus (ICA) should be isolated from the leaking containment
system. The example below has some partitions to isolate the ICA from the containment system. The
protective gas supply is introduced into the enclosure at the location of the ICA and dilutes the area so that
the equipment can operate when the system is operating.
Warning!
Refer to applicable standard for level of dilution required for safe operation of the ICA.
Any equipment operating within the enclosure outside the dilution area would have to be protected for the
hazardous area, example Ex e, m, i, etc.
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