Yokogawa EJX210B - Manual (Page 22)

<4. Installation>
4-4
IM 01C27C01-01EN
4.7 Affixing the Teflon Film
The FEP Teflon option includes a teflon film and
fluorinated oil. Before mounting the transmitter to
the process flange, affix the teflon film as follows:
IMPORTANT
1) Position the diaphragm so that the
diaphragm is in a upward position.
2) Pour the fluorinated oil on the diaphragm
and gasket area covering it completely
and evenly. Be careful not to scratch the
diaphragm or change the its shape.
3) Affix the teflon film over the diaphragm and
gasket area.
4) Next, carefully inspect the cover and try
to identify any entrapped air between
the diaphragm and the teflon film. The
air must be removed to ensure optimum
performance. If air pockets are present, use
your fingers to remove the air by starting at
the center of the diaphragm and work your
way out.
5) Position the gasket on the Teflon film.
6) Mount the transmitter onto the process
flange.
Teflon film
Diaphragm
Fluorinated oil
[PART No. : F9145YN]
Gasket area
PART No.
F9347XA
F9347YD
Prosess Flange size
3 inch (80mm)
2 inch (50mm)
F0407.ai
Figure 4.7 Affixing the Teflon Film