Azbil Corporation Instrument installation
Model MTG11A/18A, MTG11B/18B, MTG14C 2-33
Installation on PVC pipe (1)
Introduction
The installation method described in this section is used for the following combination
of pipe and grounding ring materials. For the installation method corresponding to any
other combination, refer to the table on page 2-30.
Pipe material: PVC
Grounding ring material: SUS material
Required parts
The following parts are required:
• Through-bolts and nuts
• Gaskets: Non-rubber gaskets are recommended (i.e. joint sheet or PTFE).
See Table 2-6 on page 2-29 for the recommended bore diameters.
When using rubber gaskets, another gasket of the same material
and with a thickness of 0.5 to 1.0 mm is required. See Table 2-3
on page 2-16 for the appropriated dimensions.
• Protective plate: Use a protective plate if bolt tightening to the specified torque
threatens to warp or damage the PVC pipe. The plate material
must be metal (such as stainless steel at least 6 mm thick) that will
not deform when the nuts are tightened. For the shape of the
protective plate, see Figure 2-31.
Installation procedure
The installation procedure varies depending on conditions such as the fastening torque and
the need for a protective plate. Choose one of the following three methods as applicable.
1. Use this method to install the detector to the specified fastening torque.
Install the detector as shown in Figure 2-30. The torque level for tightening the bolts
is not related to the gasket material. See Table 2-5 on page 2-27 for the appropriate
torque. For the internal diameter of the gaskets, see Table 2-2 on page 2-16.
m CAUTION
Please note that the use of rubber gaskets and a lower fastening torque may result in
insufficient surface pressure between the lining and the grounding ring, resulting in
leakage.
Figure 2-30 Installation using SUS material grounding ring
Lining
Grounding ring Gasket
CM2-MTG300-2001.book 33 ページ ２０１５年９月２９日 火曜日 午前１０時１４分
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