Emerson Process Management GmbH & Co. OHG
1-2
X-STREAM XEFD
Instruction Manual
HASXEDE-IM-EX
07/2017
1.3 Protective Measures in Detail
The cast aluminum enclosure consists of two
parts: base and cover, connected by hinges.
The area where the two parts are in contact
is designed to work as a flange, quenching
flames entering the small path between them.
When operated, the analyzer enclosure has
to be closed and secured by 20 screws with
the respective torque given on an analyzer
label, evenly arranged all over the flange.
The flame path between the flange parts
is manufactured with very low tolerances
and best flatness, to ensure the function of
quenching flames. The maximum flange gap
is allowed to be 0.04 mm (0.0015 in). For this
reason, it is of particular importance to keep
the flanges surfaces free of scratches and
other damages! The only openings penetrat
-
ing the enclosure are threads, to be used for
gas and cable in- and outlets:
Depending on the measurement application
the instrument provides up to 8 gas in- and
outlets, each protected by an approved flame
arrestor. These arrestors are installed into
threads at the bottom side of the enclosure
base. Two fitting sizes are available for ex
-
ternal connection of gas pipes with 3.18 mm
(
1
⁄
8
") or 6.35 mm (
1
⁄
4
") outer diameter (OD). Op-
tionally a clamping ring for 6 mm OD may be
used, replacing the 6,35 mm version. Unused
threads are closed with blind plugs which are
certified within the Emerson approvals.
Cables are fed into the enclosure utilizing
up to 4 cable glands, located at the enclo
-
sure’s bottom right side. The user has to buy
approved cable glands for the cables to be
installed.
For installation in North America the enclsoure
are delivered with two metric-to-NPT thread
adapters.
Threads which are not used as cable feed
through have to be closed by the respective
blind plugs from Emerson.
All threads are designed to act as a flame
path of a length ensuring that flames are
quenched before exiting to the external
atmosphere. For this reason, avoid to
damage the threads, neither externally
nor internally!
All unused threads must be closed with plugs
when the instrument is operated to ensure
explosion protection.
Note!
See the X-STREAM series instruction man-
uals for more information about common
gas analyzers features, and special features
of the X-STREAM XEFD.
Fig. 1-2:
Bottom View
1: Plugged when not used (plugs certified by Emerson)
2: Gas fitting (part of flame arrestor)
3: Plug
4: Cable gland (or conduits)
1 2
3
4
1.3 Protective Measures in Detail
