Due to the versatile conditions of use (e.g. usage duration, switching frequency,
type and temperature of product and cleaning agents as well as usage
environment), GEA Tuchenhagen recommends that the user carries out
resistance tests.
Resistance:
•
+ = good resistance
•
o = reduced resistance
•
– = no resistance
Table of sealing resistance / permitted operating temperature
Medium
Maximum operating
temperatures
Sealing material
EPDM
FKM
FFKM
Alkalis up to 3%
up to 80 °C (176°F)
+
o
+
Alkalis up to 5%
up to 40 °C (104°F)
+
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
+
+
Inorganic acids up to 5%
up to 100 °C (212°F)
–
+
+
Water
up to 100 °C (212°F)
+
+
+
Steam
up to 135 °C (275°F)
+
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
–
+
+
Table sealing materials - temperature resistance
Sealing materials
General temperature resistance*
EPDM
-40...+135°C
(-40...275°F)
FKM
-10...+200°C
(-14...392°F)
FFKM
-10...+230°C
(+14...446°F)
* The general resistance of the material does not correspond to the maximum
operating temperature
5.4
Pipe ends - General table of measurements
Hint!
Not every valve is available in every size. Details of available sizes of
valves (see chapter 5)
Technical data
Pipe ends - General table of measurements
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