3-6 | Model 888 ATEX IECEx Tail Gas Analyzer
Sample Tap Preparation
The analyzer is pipe-mounted to the process pipe using a probe, ball valve
and flange.
The sample pipe contains highly toxic and corrosive substances.
Proper personal protective equipment including fresh air breathing
apparatus, eye protection, and skin protection MUST BE worn when
installing the sample tap.
As an additional precaution against escape of toxic gases, AMETEK
recommends that a blind flange be installed on the sample tap flange
until the analyzer is installed.
Note the bolt-hole pattern and orientation of the analyzer mounting
flange in Figure 3-1. The tail gas pipe flange bolt pattern must line up
with the analyzer flange bolt pattern. This will provide two possible
analyzer mounting orientations. AMETEK recommends that the ana-
lyzer be installed with the backplate parallel to the tail gas pipe.
Ensure that all parts of the sample tap, from the very beginning of the
installation process, are kept heated at a minimum 150 °C and insu-
lated from the process pipe to the bottom of the analyzer (including
flanges). This will prevent plugging the sample tap with solid sulfur
which would interfere with commissioning the analyzer.
AMETEK recommends that a heated, 1-inch ball valve with a 2-inch,
150 lb. raised face flange (AMETEK PN 203176001 Steam Jacketed
Ball Valve or equivalent) be installed on the nozzle.
1. Install the recommended weld neck (two-inch, 150 lb raised face
flange) at a 90° angle to the top of a horizontal run of the tail gas pipe.
2. Mount the analyzer directly to this valve flange. Ensure that it is
installed plumb and level or the analyzer will not stand straight upon
installation (minor angles will not affect analyzer operation). If it is
!
WARNING
!
!
CAUTION
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