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Anasayfa > Brands > Ge-pw > Router > VEGADIF 65 Chemical seal CSB
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5
3 Planning instructions for isolating systems
Chemical seal CSB • for VEGADIF 65
36133-EN-130417
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
lesserthetemperatureinuenceonthemeasuringresult.Note:To
keepthisinuenceinreasonablelimits,youshoulduseachemical
sealwithanominalwidth≥DN80.
Theresiliencealsodependsonthediaphragmstrength,thematerial
as well as a possible coating.
ThecapillarylineinuencesthetemperaturecoecientTK
Zero point
,the
permissible ambient temperature and the step response time of an
isolating system through the length and the inner diameter. See also
chapter "Inuenceofthetemperatureto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totherequire-
mentsofthemedium.Inthefoodprocessingindustry,e.g.,onlylling
oilsthatpresentnohealthrisksarepermitted,suchasmedicinal
whiteoil.Seeoverviewofllingoilsinthefollowingchart.
Filling oil Permissible
product temper-
atures
Permissible
product tem-
peratures at
0.05 bar
abs
< p
< 1 bar
abs
Densi-
ty in g/
cm³
Vis-
cosity
in m
2
/
s•10
-6
Expan-
sion
coe-
cient 1/K
Cor-
rective
factor
for TK
Application
area
Silicone oil
KN17
-40…+180°C(-
40 … +356 °F)
-40…+80°C(-
40 … +176 °F)
0.96
up to
25 °C
55
up to
25 °C
0.00104 1 Standard
silicone oil
KN2.2
-40…+200°C(-
40 … +392 °F)
-40…+150°C(-
40 … +302 °F)
0.96
up to
20 °C
55
up to
20 °C
0.00104 1 Standard
High tempera-
tureoilKN3.1
-10…+300°C(-
14 … +572 °F)
-10 … +200 °C
(+14…+392°F)
1.07
up to
20 °C
39
up to
20 °C
0.0008 0.77 High temper-
atures
High tempera-
tureoilKN3.2
-10 … +400 °C
(+14…+752°F)
-10 … +200 °C
(+14…+392°F)
1.07
up to
20 °C
39
up to
20 °C
0.0008 0.77 High temper-
atures
Separating diaphragm
Capillaries
Chemicalsealllingoil