IM 01C25H01-01E
4-5
4. INSTALLATION
4.5 Affixing the Teflon Film
The FEP Teflon option includes a teflon film and
fluorinated oil.
Before mounting the diaphragm seal to the process
flange, affix the teflon film as follows:
IMPORTANT
(1) Position the diaphragm seal 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 dia-
phragm 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.
