DURAG D-R 290, Руководство по эксплуатации

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5 | Installation
D-R 290 71
WARNING Health hazard due to hot and/or toxic gases in the duct!
When a duct access port (such as a welded-in tube) is opened, pressurised gases
may escape.
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Always wear suitable protective equipment (such as a face mask, heat-resistant
gloves and clothing, protective breathing equipment).
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The applicable specifications safety regulations and the operating company work­
ing instructions for the plant must be complied with.
Possible material damage when making the opening in the duct.
Parts that fall may damage the duct wall or its coating.
Do not allow parts that are cut out to fall into the duct.
1. First mark the installation locations for the welded-in pipes with adjustment flanges,
2. Create an opening, using a technique appropriate to the material and situation of
the measurement duct.
3. The tube ends should project approx. 30 mm into the inside of the duct.
During installation note:
Important comments:
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The red dot on the adjustment flange must always be at the top when installed!
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The two threaded studs (A and B see Fig on the left) should be on the same hori­
zontal level.
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Before the welded-in pipes with adjustment flange can finally be fixed to the duct,
the tube for the measuring head and tube for the reflector must be aligned to each
other (see section 5.4.3 Alignment of the tube stubs [
}
76] ). The deviation be­
tween them most be no greater than ± 1°.
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Tube lengths greater than 600 mm require a larger pitch circle diameter and flange
diameter!
Fig. 5.4: Standard welded-in pipe with adjustment flange
For dimensions see Table 4.13