YOKOGAWA EJX Series - 3.2 Mounting the Diaphragm Seals

  <3.Installation>
18
IM01C25A01-01E
3. Installation
IMPORTANT
• Whenweldingpipingduringconstruction,take
carenottoallowweldingcurrentstoowthrough
thetransmitter.
• Donotsteponthisinstrumentafterinstallation.
• ForEJ430,EJ440andEJ438,
theatmosphericopeningislocatedonthelow
pressuresidecoverange.ForEJ530and
EJX630AwhosecapsulecodeisA,B,orC,the
pipeoftheatmosphericopeningislocatedonthe
pressuredetectingsection.Theseopeningsmust
notfaceupward.
F00301.ai
Capsule code
Zero-adjustment screw
Pipe
(backside of the instrument)
6




Figure3.1 EJ530andEJX630AHorizontal
MountingPosition
3.1 Mounting
■ Thetransmittercanbemountedonanominal
50mm(2-inch)pipeusingthemountingbracket
supplied,asshowninFigure3.2and3.3.Tightenthe
(four)boltsthatholdthetransmitterwithatorqueof
approximately39N·m{4kgf·m}.
Transmitter
mounting bolt
U-bolt nut
Mounting bracket
50 mm(2-inch) pipe
U-bolt
F0302.ai
Figure3.2 TransmitterMounting
(HorizontalImpulsePipingType)
Vertical pipe mounting
(Process connector upside)
Transmitter
mounting bolt
Mounting
bracket
U-bolt nut
U-bolt
50 mm
(2-inch) pipe
Vertical pipe mounting
(Process connector downside)
F0303.ai
Figure3.3 TransmitterMounting
(VerticalImpulsePipingType)
Vertical pipe mounting
50 mm
(2-inch) pipe
U-bolt (L)
U-bolt (S)
Mounting
bracket
U-bolt
nut (S)
U-bolt nut (L)
Horizontal pipe mounting
F0304.ai
Figure3.4 EJ510andEJ530Mounting
3.2 MountingtheDiaphragmSeals
IMPORTANT
• Pleaseuseagasketwithaninsidediameter(ød)
thatisgreaterthanthediameterofthediaphragm
seal.Ifagasketwithasmallerinsidediameteris
used,thediaphragmmaynotfunctioncorrectly.
• Duringthediaphragmsealinstallation,ensureas
faraspossiblethatnosealliquidheadpressureis
appliedtothediaphragmseals.
• Exercisecaresoasnottodamagediaphragm
surfaces.Sincethediaphragmprotrudesapprox.
1mmfromtheangesurface,donotplacethe
pressuredetectorsectionfacedownonasurface
asthiscandamagethediaphragm.
• Donotsharplybendortwistcapillarytubeorapply
excessivestresstothem.
• Neverloosenthefourboltssecuringthecover
angeorthescrewsatthejointsbetweenthe
capillarytubeandcoveranges.Ifthesealliquid
leaks,thetransmittercannotbeused.