Filter
Top Products
MLT 2 / BINOS
100 F
Emerson Process Management Manufacturing GmbH & Co. OHG
2 - 7
ATEX Instruction Manual
HAS8xE-IM-ATEX
January 2004
2-4-1 Hints on Flammable Gases
• When applying flammable gases (either
as sample gas or span gas) the
corresponding gas inlets and outlets
must be equipped with flame arrestors.
• To avoid internal release of flammable
gases the minimum pressure specified
for the pressurized enclosure is at least
50 Pa higher than the maximum
pressure specified for the containment
system. A differential pressure switch is
provided with the system to operate if
the pressure difference falls below
50 Pa.
2-4-1 Hints on Flammable Gases
The 50 Pa limit is the value
defined by the associated
standards. It is not allowed
to decrease this value but
higher values are allowed
and may be set dependent
on the application and diffe-
rential pressure switch
used.
Take care of the possible formation of flammable mixtures due to the possibility
of air penetration into the containment system and the resulting additional
precautions that may be necessary.
The purpose(s) for which the differential pressure switch is used (i.e. to activate
disconnection of power or to sound an alarm or otherwise maintain the safety
of the installation) is the responsibility of the user!