Yokogawa In-Situ Gas Analyzer TDLS200 - Manual (Page 18)

3.4 Process Flange Clear Aperture
The Launch and Detect unit fl anges (and insertion tubes if used) should be installed in such a way that a
minimum clear through aperture (opening) diameter of 1 ½” (38 mm) when the distance between the 2” 150#
fl ange faces does not exceed 6ft (~2 m).
Note: Larger clear through apertures may be required when operating over longer distances –
CONSULT FACTORY for further details.
3.5 Mounting the Launch and Detect Units to the Process Flange
Securely bolt the Launch and Detect Units to the process fl anges using the standard bolt holes provided. Ensure
the correct size bolts, nuts, and gasket are used in accordance with the fl ange specifi cations and in accordance
with the process specifi cations when applicable.
NOTE: If the process isolation valve fl ange is excessively hot due to the process temperature or radiant
heat, then a thermal insolating fl ange gasket should be used in order to minimize the heat transfer to the
analyzer fl ange face.
It is generally benefi cial to make the fl ange of the Launch and Detect Units and the fl ange of the process
concentric with each other. Due to the large clearance provided by standard fl anges and bolts, it is possible to
mount the two fl anges in an un-concentric manner – this should be avoided to aid laser beam alignment.
Figure 6 - Clear Aperture for Launch or Detect Unit Flanges
PROCESS FLANGE
CLEAR APERTURE TOLERANCE
LATERAL OFFSET OF NOZZELS MUST BE MINIZED AS TO
ALLOW FOR MINMUM 1.75” [45MM] CLEAR APERTURE.
BEST INSTALLATION WILL HAVE NO LATEAL OFFSET.
3-5 <3 INSTALLATION AND WIRING>
IM 11Y01B02-11E-A 5th Edition :June 5, 2012-00