Duct Work
The transmitter and receiver units are mounted on opposite sides of the duct,
and interface with the site mounting flange. To protect operators, it is
recommended that an isolating valve is used for ducts that operate higher than
atmospheric pressure.
A stand-off pipe (not supplied), nominal bore 75mm should be used between
the duct and the site mounting flange. The pipe should be long enough to keep
the equipment clear of any duct lagging, and it also helps to insulate the
equipment from any high duct temperatures.
A hole should be cut, either side of the duct, to accept a slip fit with the stand-off
pipe. A stand-off pipe should now be welded to each hole and a mounting
flange welded to each pipe with the tapped holes four-square (it may be easier
to weld the pipe and the flange together before they are fixed to the duct). To
avoid vibration and movement, it may be necessary to fit spreader plates or
bracing fillets.
Figure 2 : Site Mounting Flange Details
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