Vega VEGADIF 65 User manual

Operating instructions
Chemical seal CSB
for VEGADIF 65
Document ID: 36133

2
Contents
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
Contents
1 For your safety
1.1 Authorised personnel ....................................................................................................... 3
1.2 Appropriate use................................................................................................................ 3
1.3 Warning about incorrect use............................................................................................. 3
1.4 General safety instructions............................................................................................... 3
2 Product description
2.1 Conguration.................................................................................................................... 4
2.2 Principle of operation........................................................................................................ 4
2.3 Packaging, transport and storage..................................................................................... 4
3 Planning instructions for isolating systems
3.1 Inuenceofthecomponents ............................................................................................ 6
3.2 Inuenceoftemperaturechanges.................................................................................... 7
3.3 Dynamic behaviour of the chemical seals ...................................................................... 11
3.4 Installation position......................................................................................................... 12
3.5 Selection of the measuring range................................................................................... 14
3.6 Calculation of the temperature error ............................................................................... 16
4 Mounting
4.1 Application conditions .................................................................................................... 18
4.2 Oxygen applications....................................................................................................... 18
4.3 Instructions for handling ................................................................................................. 18
4.4 Mounting instructions ..................................................................................................... 19
5 Maintenanceandfaultrectication
5.1 Maintenance .................................................................................................................. 20
6 Supplement
6.1 Technical data ................................................................................................................ 21
6.2 Chemical seal with vacuum applications........................................................................ 21
6.3 Dimensions and weight .................................................................................................. 25
6.4 Industrial property rights................................................................................................. 33
6.5 Trademark ...................................................................................................................... 33
Editing status: 2017-03-17

3
1 For your safety
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
1 For your safety
1.1 Authorised personnel
All operations described in this operating instructions manual must
be carried out only by trained specialist personnel authorised by the
plant operator.
During work on and with the device the required personal protective
equipment must always be worn.
1.2 Appropriate use
Thechemicalsealisafunctionalpartofthedierentialpressure
transmitter VEGADIF 65.
Youcannddetailedinformationabouttheareaofapplicationin
chapter "Product description".
Operational reliability is ensured only if the instrument is properly
usedaccordingtothespecicationsintheoperatinginstructions
manual as well as possible supplementary instructions.
1.3 Warning about incorrect use
Inappropriate or incorrect use of the instrument can give rise to
application-specichazards,e.g.vesseloverllordamagetosystem
components through incorrect mounting or adjustment.
1.4 General safety instructions
The safety information in the operating instructions manual of the
respective sensor must be noted.

4
2 Product description
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
2 Product description
2.1 Conguration
The scope of delivery encompasses:
• Chemical seal mounted on VEGADIF 65
• Documentation
– This operating instructions manual
The CSB chemical seal consists of the following components: sepa-
ratingdiaphragm,processttingaswellastransmissionline(capillar-
ies). The components are fully welded together with each other and
withtheassociateddierentialpressuretransmitterandrepresenta
hermetically sealed system.
1
2
4
3
Fig. 1: VEGADIF 65 with chemical seal CSB
1 VEGADIF 65
2 Transmission line (capillaries)
3 Processtting
4 Separating diaphragm
2.2 Principle of operation
Chemical seals should be used if a separation between medium and
pressure transmitter is necessary, particularly with:
• High product temperatures
• Corrosive products
• Strong vibration at the measuring point
The process pressure acts on the separating diaphragm.This dia-
phragm transmits the process pressure through the capillary line to
thesensorelementofthedierentialpressuretransmitter.
2.3 Packaging, transport and storage
Your instrument was protected by packaging during transport. Its
capacity to handle normal loads during transport is assured by a test
based on ISO 4180.
The packaging of standard instruments consists of environment-
friendly, recyclable cardboard. For special versions, PE foam or PE
Scope of delivery
Constituent parts
Area of application
Functional principle
Packaging

5
2 Product description
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
foil is also used. Dispose of the packaging material via specialised
recycling companies.
Caution:
Instruments for oxygen applications are sealed in PE foil and provided
with a label "Oxygen! Use no Oil". Remove this foil just before mount-
ing the instrument! See instruction under "Mounting".
Transport must be carried out in due consideration of the notes on the
transport packaging. Nonobservance of these instructions can cause
damage to the device.
The delivery must be checked for completeness and possible transit
damage immediately at receipt. Ascertained transit damage or con-
cealed defects must be appropriately dealt with.
Up to the time of installation, the packages must be left closed and
stored according to the orientation and storage markings on the
outside.
Unless otherwise indicated, the packages must be stored only under
the following conditions:
• Not in the open
• Dry and dust free
• Not exposed to corrosive media
• Protected against solar radiation
• Avoiding mechanical shock and vibration
• Storage and transport temperature see chapter "Supplement -
Technical data - Ambient conditions"
• Relative humidity 20 … 85 %
Transport
Transport inspection
Storage
Storage and transport
temperature

6
3 Planning instructions for isolating systems
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
3 Planning instructions for isolating
systems
3.1 Inuenceofthecomponents
The following properties of the separating diaphragm determine the
application area of the chemical seal:
• Diameter
• Resilience
• Material
The bigger the diaphragm diameter, the higher the resilience and the
smallerthetemperatureinuenceonthemeasuringresult.Note:To
keepthisinuencewithinreasonablelimits,youshoulduseachemi-
calsealwithanominalwidth≥DN80.
The resilience also depends on the diaphragm thickness, the material
as well as a possible coating.
ThecapillarylineinuencesthetemperaturecoecientTKZero point,
the permissible ambient temperature and the step response time of
an isolating system through its length and inner diameter. See also
chapter "Inuenceofthetemperatureonthezeropoint", "Ambient
temperature range" and "Step response time".
Intheselectionofllingoil,productandambienttemperatureas
well as process pressure are of utmost importance. Also take note of
temperatures and pressures during setup and cleaning.
Anothercriteriumisthecompatibilityofthellingoilwiththerequire-
ments of the medium. In the food processing industry, for example,
onlyllingoilsthatpresentnohealthrisksarepermitted,e.g.medici-
nalwhiteoil.Seeoverviewofllingoilsinthefollowingchart.
The table also shows the permissible medium temperature depending
on the isolating liquid and instrument version for pabs > 1 bar/14.5 psi.
For the medium temperature with instrument version for pabs
< 1 bar/14.5 psi, see chapter "Chemicalsealforvacuumapplica-
tions".
Filling oil Permissible medium
temperature with pabs
> 1 bar/14.5 psi
Density in
g/cm³ at
25 °C
Kinemat-
ic viscosity
in cSt at
25 °C
Corrective
factor for
TK
Application area
SiliconeoilKN17 -40…+180°C(-
40 … +356 °F)
0.96 4.4 1 Low temperatures
SiliconeoilKN2.2 -40…+200°C(-
40 … +392 °F)
0.96 54.5 1 Standard
High temperature oil
KN32
-10…+300°C(-
14 … +572 °F)
1.06 47.1 0.77 High temperatures
High temperature oil
KN32
-10 … +400 °C
(+14…+752°F)
1.06 47.1 0.77 High temperatures
HalocarbonoilKN21 -40…+150°C(-
40 … +302 °F)
1.89 10.6 0.83 For chlorine appli-
cations
Separating diaphragm
Capillaries
Chemicalsealllingoil

7
3 Planning instructions for isolating systems
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
Filling oil Permissible medium
temperature with pabs
> 1 bar/14.5 psi
Density in
g/cm³ at
25 °C
Kinemat-
ic viscosity
in cSt at
25 °C
Corrective
factor for
TK
Application area
HalocarbonoilKN21
(BAMtested)
-40…+60°C(-
40 … +140 °F)
1.89 10.6 0.83 For oxygen appli-
cations
Med.whiteoilKN92
(FDAapproved)
-10 … +250 °C
(+14…+482°F)
0.85 45.3 0.63 Food applications
NeobeeM-20KN59
(FDAapproved)
-10 … +150 °C
(+14…+302°F)
0.92 10 Food applications
TheimplementedllingoilalsoinuencestheTKzeropoint, the permis-
sible ambient temperature and the step response time of a chemical
seal. See also chapter "Inuenceofthetemperatureonthezero
point" and "Step response time".
Thedierentialpressuretransmitteralsoinuencesthetemperature
applicationrange,theTKzeropoint and the step response time of the iso-
latingsystemthroughthevolumeofitslateralangesanditscontrol
volume.1)
3.2 Inuenceoftemperaturechanges
Thellingoilexpandsasthetemperatureincreases.Theadditional
volume presses on the chemical seal. The more rigid the diaphragm,
the more it counteracts a volume change. The additional volume also
adds to the process pressure on the measuring cell and thus shifts
thezeropoint.Therespectivetemperaturecoecient"TKProcess" is
listed in chapter "Dimensions and weights".
Thefollowingdiagramshowsthetemperaturecoecientdepending
on the capillary length.The process temperature corresponds to the
calibrationtemperature.Thetemperaturecoecientsdetermined
from the diagram apply to silicone oil and the diaphragm material
316L.Forotherllingoil,thesetemperaturecoecientshavetobe
multipliedwiththecorrectionfactorfortheTKoftherespectivelling
oil.
Dierentialpressure
transmitter
Inuenceofthetempera-
ture on the zero point
1) The control volume is the volume that must be shifted in order to utilise the
entire measuring range.

8
3 Planning instructions for isolating systems
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
1,4
4
0
2
6
10
8
12
[m]
0 1 2 3 4 5 6 7 8 9 10
[mbar
/
10 K]
1
2
3
4
5
Fig.2:Temperaturecoecient"TKAmbient"dependingonthecapillarylength.
Characteristics1…5relatedtotheprocessttingslistedbelow.
• Characteristics 1
– Clamp3"(ø91mm)accordingtoDIN32676,ISO2852/316L
• Characteristics 2
– EN/DINangeDN80PN10-40B1,316L
– EN/DINangeDN100PN10-16B1,316L
– EN/DINangeDN100PN25-40B1,AISI316L
– ASMEange3"150lbsRF,316/316L
– ASMEange3"300lbsRF,316/316L
– DIN 11851 DN 80 PN 25, 316L
– DIN 11851 DN 80 PN 25 socket, AISI 316L
– Cell DN 80 PN 16-400, 316L
– Cell DN 100 PN 16-400, 316L
– Cells 3" 150-2500 lbs, 316L
• Characteristics 3
– ASMEange3"150lbsRF,316/316L,extension:2"/4"/6"/8"
• Characteristics 4
– EN/DINangeDN50PN10-40B1,316L
– ASMEange2"150lbsRF,316/316L
– ASMEange3"300lbsRF,316/316L
– DIN 11851 DN 50 PN 25, 316L
– DIN 11851 DN 50 PN 25 socket, AISI 316L
– Cell DN 50 PN 16-400, 316L
– Cell 2" 150-2500 lbs, 316L
• Characteristics 5
– DRDDN50(65mm),PN25,316L
• Chemicalseal:EN/DINangeDN80PN10-40B1,AISI316L
• Capillary length: 5 m
• Ambient temperature capillaries/transmitter: 45 °C
• Filling oil: Silicone oil
To calculate the indication, proceed as follows:
Method of calculation

9
3 Planning instructions for isolating systems
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
1. Choose characteristics for the chemical seal from the list.
Result: characteristics 2
2. DeterminevalueforTKAmbient from the diagram.
Result:1.4mbar/10K
3. TAmbient - TCalibration=45°C-25°C=20°C;(1.4mbar/10K)•20K=
2.8 mbar
Result:
Inthisapplicationcase,thezeropointisshiftedby2.8mbar.
Theinuenceofthetemperatureonthezeropointcanbecorrected
by a position adjustment.
Thefollowingareoptionsforreducingthetemperatureinuence:
• Smallercapillaryinnerdiameter(Note:Thestepresponsetime
increases with decreasing diameter, however)
• Shorter capillaries
• Chemical seal with larger diaphragm diameter
• Fillingoilwithasmallerexpansioncoecient
The following parameters determine the ambient temperature range
of the chemical seal system:
• Filling oil
• Capillary length
• Capillary inner diameter
• Oil volume of the chemical seal
• Process temperature
The following diagrams show the permissible ambient temperature
range depending on the capillary length. They apply to a process
temperature of 25 °C and silicone oil.The application range can be
extendedbyusingallingoilwithasmallerexpansioncoecientand
shorter capillaries.
• Group B
– Cell 2" 150-2500 lbs, 316L
– ASMEange2"150lbsRF,316/316L
– ASMEange2"300lbsRF,316/316L
– Cell DN 50 PN 16-400, 316L
012345678910
–40
–20
0
20
40
60
80
Ambient temperature [°C]
Capillarylength[m]
GroupB
permitted
operating range
Fig.3:Permissibleambienttemperaturerangedependingonthecapillary
lengthforchemicalsealsofgroupB
Reduction of the tem-
peratureinuence
Ambient temperature
range

10
3 Planning instructions for isolating systems
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
• Group C
– EN/DINangeDN80PN10-40B1,316L
– EN/DINangeDN100PN10-16B1,316L
– EN/DINangeDN100PN25-40B1,AISI316L
– DIN 11851 DN 80 PN 25, 316L
– Cell DN 80 PN 16-400, 316L
– Cell DN 100 PN 16-400, 316L
– Cell 3" 150-2500 lbs, 316L
012345678910
–40
–20
0
20
40
60
80
Ambient temperature [°C]
Capillarylength[m]
GroupC
permitted
operating range
Fig.4:Permissibleambienttemperaturerangedependingonthecapillary
lengthforchemicalsealsofgroupC
• Group D
– ASMEange3"150lbsRF,316/316L
– ASMEange3"300lbsRF,316/316L
– Cell 3" 150-2500 lbs, 316L
012345678910
–40
–20
0
20
40
60
80
Ambient temperature [°C]
Capillarylength[m]
GroupD
permitted
operating range
Fig.5:Permissibleambienttemperaturerangedependingonthecapillary
lengthforchemicalsealsofgroupD
• Group E
– ASMEange3"150lbsRF,316/316L,extension:2"/4"/6"/8"

11
3 Planning instructions for isolating systems
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
012345678910
–40
–20
0
20
40
60
80
Ambient temperature [°C]
Capillarylength[m]
GroupE
permitted
operating range
Fig.6:Permissibleambienttemperaturerangedependingonthecapillary
lengthforchemicalsealsofgroupE
• Group F
– DRDDN50(65mm),PN25,316L
012345678910
–40
–20
0
20
40
60
80
Umgebungstemperatur [°C]
Kapillarlänge[m]
Gruppe F
erlaubter
Einsatzbereich
Fig.7:Permissibleambienttemperaturerangedependingonthecapillary
lengthforchemicalsealsofgroupF
3.3 Dynamic behaviour of the chemical seals
Theviscosityofthellingoil,thecapillarylengthaswellastheinner
diameterinuencethefrictionalresistance.Thehigherthefrictional
resistance, the longer the step response time.The step response time
isalsoinuencedbythecontrolvolumeofthemeasuringcell.The
smaller the control volume of the measuring cell, the shorter the step
response time.
Thefollowingdiagramshowsthetypicalstepresponsetimes(T90)of
thedierentllingoilsdependingonthemeasuringcellandcapil-
laryinnerdiameter.Thevaluesarespeciedinsecondspermeter
capillary length and must be multiplied by the actual length of the
capillaries. The step response time of the transmitter must also be
taken into account.
Step response time

12
3 Planning instructions for isolating systems
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
1
2
3
4
5
6
7
DN50
(1 mm)
DN80
(2 mm)
500 mbar3bar
DN50
(1 mm)
DN80
(2 mm)
0
2
4
6
8
Fig.8:Typicalstepresponsetimes(T90)ins/mfordierentllingoilsdepend-
ingonthemeasuringcellandcapillaryinnerdiameter.Ambienttemperature=
20°C
1 Silicone oil
2 High temperature oil
3 Med. white oil
4 Inert oil
5 Nominal width
6 Capillaryinnerdiameter
7 Measuring cell
90 %
100 %
t
T90%
1
2
Fig.9:Presentationofthestepresponsetime(T90)
1 Pressure jump
2 Output signal
For minimisation of the step response time, you have to following
options:
• Bigger capillary inner diameter
• Shorter capillaries
• Filling oil with lowest viscosity
3.4 Installation position
When the pressure transmitter is mounted above the lower chemical
seal,themax.heightdierenceH1accordingtothefollowingillustra-
Minimization of the step
response time
Standard applications

13
3 Planning instructions for isolating systems
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
tion may not be exceeded. The value depends on the density of the
llingoilandthesmallestpressurethatmayactonthechemicalseal
oftheplusside(emptyvessel).
Typical values for H1 are 7 m with silicone oil and 4 m with halocarbon
oil.
+ –
+
–
H1
–+
Fig.10:Max.heightwhenmountingabovethelowerchemicalseal
In vacuum applications, the pressure transmitter should be mounted
at the same height as or below the lower chemical seal. By doing
this,anadditionalvacuumloadfromthellingoilinthecapillariesis
avoided.
+ –
+
–
Fig.11:Preferredmountingbelowthelowerchemicalseal
Vacuum applications

14
3 Planning instructions for isolating systems
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
=∆p
hg
+
–
h
1
Fig.12:DensitymeasurementwithVEGADIF65,h=denedmountingdis-
tance,Δp=dierentialpressure,ρ=densityofthemedium,g=accelerationof
gravity
1 VEGADIF 65
1
+
–
h
2
3
Fig.13:InterfacemeasurementwithVEGADIF65
1 VEGADIF 65
2 Liquidwithhigherdensity
3 Liquidwithlowerdensity
3.5 Selection of the measuring range
Forinstrumentswithchemicalsealsandcapillaries,thezeropoint
shiftduetothehydrostaticpressureoftheuidcolumninthecapillar-
ies must be taken into account when selecting the measuring cell.
Density measurement
Interface measurement

15
3 Planning instructions for isolating systems
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
+ –
+
–
min.
∆
ρM
= 0,96 kg/dm3
= 1,0 kg/dm3
pi
ρFl
H1 = 0,3 m
Hv = 1,8 m
H = 1 m
Hu = 0,2 m
max.
Fig.14:Dataforselectionofthemeasuringcell
Pressureontheminussideofthedierentialpressuretrans-
mitter with min. level:
p-= pHv + pH1=Hv•ρFl•g+H1•ρFl•g+ pi
=1.8m•(0.96kg/dm³•9.81m/s)+0.3m•(0.96kg/dm³•9.81m/s)
+ pi
= 197.77 mbar + pi
Pressureontheplussideofthedierentialpressuretransmit-
ter with min. level:
p+=pHu + pH1=Hu•ρFM•g+H1•ρFl•g+pi
=0.2m•(1kg/dm³•9.81m/s)+0.3m•(0.96kg/dm³•9.81m/s)+pi
= 47.87 mbar + pi
Dierentialpressureonthetransmitterwithmin.level:
ΔpTransmitter = p+- p-
= 47.87 mbar - 197.77 mbar
= -149.90 mbar
Dierentialpressureonthetransmitterwithmax.level:
ΔpTransmitter = p+- p-+ΔH•(1.0kg/dm³•9.81m/s)
= -149.90 mbar + 98.1 mbar
= -51.80 mbar
Hence a 100 mbar measuring cell is required for this application
example.
Exampleforselectionof
the measuring cell

16
3 Planning instructions for isolating systems
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
3.6 Calculation of the temperature error
With double-sided mounting of chemical seals, the total temperature
inuenceiscomposedofthefollowing:
• Inuenceoftheprocesstemperatureonthechemicalseal
(TKProcess)
• Correctivefactorwithspecialmaterials(withTantalum,Alloy:1.5;
with PTFE coating: 1.8)
• Correctivefactorforllingoil
• InuenceoftheambienttemperatureTKAmb. on the pressure trans-
mitter(thermalmodicationofzerosignalandspan)
The calibration temperature of the isolating system is 20 °C. For the
calculation, the temperature must be deducted from the respective
process or ambient temperature.
TheTKProcess chemical seal is listed in the tables in chapter "Dimen-
sions and weights" of this operating instructions. The correction factor
forthellingoilislistedinchapter"Inuenceofthecomponents".
Thethermalchangeofzerosignalandspanisspeciedinchapter
"Technical data"ofthedierentialpressuretransmitter.
Information:
In case of double-sided, idential chemical seal mounting, the
temperatureinuencesshouldcompensate.Itshowsthatthereisnev-
erthelessanerrorthroughthetemperatureinuence.Inpracticewe
calculate with 20 % of the sum of the invidual errors of the two chemi-
cal seals. This is also taken into account in the following example.
Finally, the calculated temperature errors of pressure transmitter and
chemical seal must be added up geometrically.
• Process temperature: 100 °C
• Flange isolating diaphragm DN 80 PN 10-40
• TKProcessangeisolatingdiaphragm:1.34mbar/10K(seechap-
ter "Supplement" of this manual)
• Capillary length: 4 m
• Filing oil silicone: correction factor 1
• Diaphragm material.: Tantalum, correction factor 1.5
• Ambient temperature TU: 40 °C
• TKCapillaries=0.3mbar/10K(seediagraminchapter"Inuenceof
temperature changes" or delivery documents
ΔTProcesstemperature-Referencetemperaturechemicalseal
=100°C-20°C=80K
ΔTAmbienttemperature-Referencetemperaturecapillaries
=40°C-20°C=20K
Number of chemical seals = 2
Error calculation
Δpchemical seal=(1.34mbar/10K)•80K•2=21.44mbar
Corrective factor diaphragm material = 21.44 mbar • 1.5 = 32.16 mbar
ΔpCapillaries=(0.3mbar/10K)•20K•4m•2=4.8mbar
Actuating variables
Exampleofdouble-sided
chemical seal:

17
3 Planning instructions for isolating systems
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
ΔpTotal = 32.16 mbar + 4.8 mbar = 36.96 mbar
The total temperature error of the double-sided chemical seal is 20 %
of 36.96 mbar as listed above, i.e. 7.4 mbar.

18
4 Mounting
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
4 Mounting
4.1 Application conditions
Before mounting, setup and operation, take note that the pressure
transmitter as well as the chemical seal were selected according to
measuring range, version and material suitable for the process condi-
tions.The load limits must be maintained in order to guarantee the
speciedaccuracy.
Caution:
In dangerous substances such as e.g. oxygen, acetylene, combusti-
ble or toxic products as well as in refrigerating plants, compressors,
etc., the pertinent instructions must be observed in addition to the
general regulations.
Take note of the following issues in respect to the process and ambi-
ent temperature:
• Mountthedierentialpressuretransmitterinsuchawaythatthe
permissible process and ambient temperature limits are neither
underrun nor exceeded.
• Taketheinuenceofconvectionandheatradiationintoaccount
• Whenselectingthechemicalseals,makesurethatthettingsand
angesarepressureandtemperatureresistant
• For this purpose select the suitable material and pressure stage
• Mount in such a way that plus and minus side have the same
ambienttemperaturestokeepthetemperatureinuenceslow
4.2 Oxygenapplications
Oxygen and other gases can be explosive when brought into contact
with oils, grease and plastics, so the following measures must also be
taken:
• All components of the plant, such as e.g. measuring instruments
must be cleaned oil and grease-free for oxygen applications
accordingtotherequirementsofBAM(FederalInstituteforMateri-
als Research and Testing)
• Max. temperatures and pressures determined with oxygen appli-
cations must not be exceeded, see chapter "Technical data" and
"Chemicalsealswithvacuumapplications", also keep sealing
material in mind
Danger:
Instruments for oxygen applications must be unpacked just before
mounting.Afterremovingtheprotectivecoveroftheprocesstting,
the label "O2"willbevisibleontheprocesstting.Penetrationofoil,
grease and dirt should be avoided. Danger of explosion!
4.3 Instructions for handling
• Instrumentsmustbeprotectedagainstsoilingandstronguctua-
tions of the ambient temperature
Suitability for the process
conditions
Process and ambient
temperature
Oxygenapplications

19
4 Mounting
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
• Leave the measuring system in the packaging until mounting to
protect it against mechanical damages
• When removing the packaging and when mounting, take special
care to avoid mechanical damage and deformation of the dia-
phragm
• Do not carry the pressure transmitter by holding the capillary line
• Donotbentthecapillarylines.Kinkscancauseleakageandlead
to an increase in response time
• Never loosen sealed screws on the chemical seal or the pressure
transmitter
• Do not damage the isolating diaphragm: scratches on the isolating
diaphragm(e.g.fromsharpsubjects)arethemainareaswhere
corrosion can occur
4.4 Mounting instructions
• Suitable seals must be selected for sealing
• Forangemounting,useasealwithasucientlylargeinnerdiam-
eter and place the seal centrically; contact with the diaphragm will
cause measurement deviations
• When using soft material or PTFE seals, take note of the regula-
tionsofthesealmanuacturer,particularlywithrespecttotorque
and settling cycles
• Layinvibration-freeareastoavoidadditionalpressureuctuations
• Do not lay close to heating or cooling lines
• Insulate in case of colder or warmer ambient temperatures
• Bendingradiusofthecapillaries≥30mm
Sealing
Laying the capillaries

20
5Maintenanceandfaultrectication
Chemical seal CSB • for VEGADIF 65
36133-EN-170317
5 Maintenanceandfaultrectication
5.1 Maintenance
If the device is used properly, no special maintenance is required in
normal operation.
In some applications, product buildup on the separating diaphragm
caninuencethemeasuringresult.Dependingontheapplication,
take precautions to ensure that heavy buildup, and especially a hard-
ening thereof, is avoided.
Caution:
Never clean the separating diaphragm mechanically, for example with
tools! This can damage the diaphragm and lead to oil leakage.
If necessary, clean the separating diaphragm with a soft brush and
suitable cleaning detergent. Make sure that the materials are resistant
to the cleaning process. The wide variety of applications of chemical
seals makes special cleaning instructions necessary for each applica-
tion. Please ask the agency serving you.
Maintenance
Cleaning