GEA VARIVENT TSVN Operating Instruction page 18

Technical data
Resistance and permitted operating temperature of the sealing materials
•
Table of sealing resistance / permitted operating temperature
Maximum
Medium operating
temperatures
Alkalis up to 3% up to 80 °C (176°F)
Alkalis up to 5% up to 40 °C (104°F)
Alkalis up to 5% up to 80 °C (176° F)
Alkalis more than
5%
Inorganic acids up
up to 80 °C (176°F)
to 3%
Inorganic acids up
up to 80 °C (176°F)
to 5%
Inorganic acids up up to 100 °C
to 5% (212°F)
Water up to 80 °C (176°F)
up to 135 °C (275°
Steam
F)
Steam, approx. 30 up to 150 °C
min (320°F)
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
EPDM
FKM
HNBR
PTFE
* The general resistance of the material does not correspond to the maximum
operating temperature
18
– = no resistance
Sealing materials
EPDM
+
+
+
o
+
o
–
+
+
+
–
+
–
–
FKM HNBR
o +
o o
– –
– –
+ +
+ o
+ –
+ +
o o
o –
+ +
+ +
+ +
+ +
General temperature resistance*
-40...+135 °C *
(-40...275 °F)
-10...+200 °C *
(+14...+392 °F)
-25...+140 °C *
(-13...+284 °F)
-200...+260 °C
(-328...+500 °F)
PTFE
+
+
+
+
+
+
+
+
+
+
+
+
+
+
430BAL008565EN_1
21.03.2022