Azbil MagneW Two-wire PLUS+ MTG15A, User Manual

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2-30
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 2-27.
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 2-26 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 2-12 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 Fig. 2-27.
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 Fig. 2-26. The torque level for tightening the bolts is not
related to the gasket material. See Table. 2-5 on page 2-24 for the appropriate torque. For
the internal diameter of the gaskets, see Table. 2-2 on page 2-12.
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.
Lining
Grounding ring Gasket
Fig. 2-26. Installation using SUS material grounding ring