The resistance of sealing materials depends on the type and temperature of the
medium conveyed. The exposure time can adversely affect the service life of the
seals. The sealing materials comply with the regulations of FDA 21 CFR
177.2600 or FDA 21 CFR 177.1550.
Resistance:
•
+ = good resistance
•
o = reduced resistance
•
- = no resistance
* Depending on the installation conditions
Seal resistance for EPDM, FKM, HNBR, PTFE
Medium
Temperature
Sealing material (general operation
temperature)
PTFE
-40…+260°C *
(-40...500 °F)
C-PTFE
-40…+260°C *
(-40...500 °F)
Caustics up to 3%
up to 80 °C (176 °F)
+
+
Caustics up to 5%
up to 40 °C (104 °F)
+
+
Caustics up to 5%
up to 80 °C (176° F)
+
+
Caustics at more than 5%
+
+
Inorganic acids up to 3%**
up to 80 °C (176 °F)
+
+
Inorganic acids up to 5%**
up to 80 °C (176 °F)
+
+
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)
+
+
Steam, approx. 30 min
up to 150 °C (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
** Inorganic acids are, e.g. carbonic acid, nitric acid and sulphuric acid
Technical data
Resistance of Sealing Materials
430BAL011762EN_2
28.05.2018
21
