•
– = no resistance
Table of sealing resistance / permitted operating temperature
Medium
Maximum
operating
temperatures
Sealing materials
EPDM
FKM
HNBR
PTFE
Alkalis up to 3%
up to 80 °C (176°F)
+
o
+
+
Alkalis up to 5%
up to 40 °C (104°F)
+
o
o
+
Alkalis up to 5%
up to 80 °C (176° F)
+
–
–
+
Alkalis more than
5%
o
–
–
+
Inorganic acids up
to 3%
up to 80 °C (176°F)
+
+
+
+
Inorganic acids up
to 5%
up to 80 °C (176°F)
o
+
o
+
Inorganic acids up
to 5%
up to 100 °C
(212°F)
–
+
–
+
Water
up to 80 °C (176°F)
+
+
+
+
Steam
up to 135 °C (275°
F)
+
o
o
+
Steam, approx. 30
min
up to 150 °C
(320°F)
+
o
–
+
Fuels/hydrocarbons
–
+
+
+
Product with a fat
content of max. 35%
+
+
+
+
Product with a fat
content of more
than 35%
–
+
+
+
Oils
–
+
+
+
* Depending on the
installation
conditions
Table sealing materials - temperature resistance
Sealing materials
General temperature resistance*
EPDM
-40...+135 °C *
(-40...275 °F)
FKM
-10...+200 °C *
(+14...+392 °F)
HNBR
-25...+140 °C *
(-13...+284 °F)
PTFE
-200...+260 °C
(-328...+500 °F)
* The general resistance of the material does not correspond to the maximum
operating temperature
Technical data
Resistance and permitted operating temperature of the sealing materials
430BAL008565EN_1
18
21.03.2022
Содержание VARIVENT TSVN
Страница 47: ...Dimension sheet VARINLINE Sampling valve type TSVN 430BAL008565EN_1 21 03 2022 47 ...
Страница 48: ......
