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2016-09 · Doppelsitz-Bodenventil T_R / T_RL / T_R / Mixproof Bottom Valve T_R / T_RL / T_RC
Resistance of Sealing Materials
The resistance of sealing materials depends on the type and temperature of the medium conveyed.
The contact time can negatively 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.
Medium
Temperature
Sealing material (general operating temperature)
EPDM FKM
HNBR
-40...+135°C )
−
10...+200 °C
-25...+140 °C
-40...275°F
14...+392°F
13...+284°F
Caustics up to 3%
up to 80 °C (176°F)
good resistant
reduced service life
good resistant
Caustics up to 5%
up to 40 °C (104°F)
good resistant
reduced service life
reduced service life
Caustics up to 5%
up to 80 °C (176°F)
good resistant
not resistant
not resistant
Caustics über 5%
reduced service life
not resistant
not resistant
Anorganic
up to 80 °C (176°F)
good resistant
good resistant
good resistant
Acids up to 3%
Anorganic
up to 80 °C (176°F)
reduced service life
good resistant
reduced service life
Acids up to 5%
Anorganic
up to 100 °C (212°F) not resistant
good resistant
not resistant
Acids up to 5%
Water
up to 80 °C (176°F)
good resistant
good resistant
good resistant
Steam
up to 135 °C (275°F) good resistant
reduced service life
reduced service life
Steam, app. 30 min
up to 150 °C (302°F) good resistant
reduced service life
not resistant
Treibstoffe/Kohlen-
not resistant
good resistant
good resistant
wasserstoffe
Product with a fat content
good resistant
good resistant
good resistant
of max. 35%
Product with a fat content
not resistant
good resistant
good resistant
of more than 35%
Oils
not resistant
good resistant
good resistant