Yokogawa In-Situ Gas Analyzer TDLS200 User Manual
Page 12
12
IM11Y01B01-12E-A
1st Edition
The standard flange sizes are either 2” 3” or 4” 150# R.F. ANSI as well as DN50 and DN80. Please
check the exact flange size specified and provided for the particular installation. Other flange sizes
and a variety of materials (to suit the process) are available so please check these details prior to
installing the flanges on the process.
The process isolation valves should have at least a 95%
diameter clear bore size (aperture) to ensure there is sufficient
tolerance to align the laser beam after installation. Ducts and
Stacks that have thin and flexible walls should be reinforced to
ensure that the laser beam alignment is maintained at all times.
Rigid mounting for the process flanges is highly recommended
to ensure alignment is maintained.
In situations where the process flanges are mounted to these thin and flexible duct/stack walls, a
larger reinforcing plate should be welded around the mounting flange area to increase the
attaching region. The figure below depicts a typical suggestion however; it is the installer’s
responsibility to ensure appropriately rigid installation is provided for the analyzer.
Below: Typical 24” x 24” x 3/8” reinforcement plate.
This approach is NOT suitable for systems that use the Large Aperture Optics (LAO) detect
unit, these are typically installed on applications with at least 7m (21ft) optical path length.
For these long path length installations, more significant bracing and structural rigidity is
required – refer to following section: