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
2015-09 · Vanne de fond à double siège T_R / T_RL / T_R / Mixproof Bottom Valve T_R / T_RL / T_RC
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