YOKOGAWA EJA210E - 3.5 Affixing The Teflon Film

<3. Installation>
33
IM01C25A01-01E
3.4.2 Mounting to Process Flange
Tightentheboltstocompletelyclosethegapbetweenthe
ringandthepressuredetectorsection.
Thematingange,gasket,studboltsandnutsareto
procuredbythecustomer.
F0310.ai
Ring
Diaphragm
Pressure-detector
section
Gasket
Mating flange
Spiral gasket
Figure 3.10 Mounting to Process Flange
IMPORTANT
• Conrmthatthereisnogapbetweenthering
andtheprocess-detectorsectionaftertheyare
mountedontheprocessange.Agapcanleadto
asudden,explosivereleaseofprocessuids.
• Whenmountingorremovingthering,takecarenot
totiltthepressuredetectordownwardasthering
can slip off and cause injury.
• Whenre-mountingthering,usethenewspiral
gasketasshowninbelowtable.
Table 3.1 Spiral Gasket for Pressure Detector
Section Side*
Part number Size Description
F9350SV ø100×ø120×t4.5 For3-inchange
F9970XF ø100×ø120×t4.5 For3-inchange**
F9350ST ø70×ø90×t4.5 For2-inchange
F9970XD ø70×ø90×t4.5 For2-inchange**
F9346ZH ø60×ø75×t4.5 For11/2-inchange
F9970XB ø60×ø75×t4.5 For11/2-inchange**
*: Material;316SST(Hoop),PTFETeon(Filler)
**: Foroil-prohibiteduse(Optioncode:/K1,/K2,/K5,/K6)
3.5 AfxingtheTeonFilm
IMPORTANT
TheFEPTeflonoptionincludesateflonfilmand
fluorinatedoil.Beforemountingthetransmittertothe
processange,afxtheteonlmasfollows:
1)Positionthediaphragmsealsothatthediaphragm
is in an upward position.
2)Pourtheuorinated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)Afxtheteonlmoverthediaphragmandgasket
area.
4)Next,carefullyinspectthecoverandtrytoidentify
anyentrappedairbetweenthediaphragmand
theteonlm.Theairmustberemovedtoensure
optimumperformance.Ifairpocketsarepresent,
useyourngerstoremovetheairbystartingatthe
centerofthediaphragmandworkyourwayout.
5)PositionthegasketontheTeonlm.
6)Mountthetransmitterontotheprocessange.
F0311.ai
EJ210 F9347YD
EJ118
EJ438
F9347YA
2 inch
F9347XA3 inch
Teflon film
PART No.
Diaphragm
Fluorinated oil
[PART No. : F9145YN]
Gasket area
Figure3.11 AfxingtheTeonFilm