Resistance:
•
+ = good resistance
•
o = reduced resistance
•
– = no resistance
Table of sealing resistance / permitted operating temperature
Medium
Maximum
operating
temperatures
Sealing material
EPDM
FKM
HNBR
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 100 °C
(176°F)
+
+
+
Steam
up to 135 °C
(275°F)
+
o
o
Steam, approx.
30 min
up to 150 °C
(302°F)
+
o
–
Fuels/hydrocarbons
–
+
+
Product with a fat content of max.
35%
+
+
+
Product with a fat content of more
than 35%
–
+
+
Oils
–
+
+
Sealing materials
General temperature resistance*
EPDM
-40...+135 °C
(-40...275 °F)
FKM
-10...+200 °C
(+14...+392 °F)
Technical data
Resistance and permitted operating temperature of the sealing materials
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Summary of Contents for VARIVENT K
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