Resistance of Sealing Materials
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 regula-
tions of FDA 21 CFR 177.2600 or FDA 21 CFR 177.1550.
Resistance:
•
+ = good resistance
•
o
= reduced service life
•
–
= not resistant
Table Resistance of Sealing Materials
Medium
Temperature
Sealing material (general operation temperature)
EPDM
-40...+135°C
-40...+275°F
FKM
-10...+200 °C
+14...+392°F
HNBR
-25...+140 °C
-13...+284°F
Caustics up to 3%
up to 80 °C (< 176°F)
+
o
+
Caustics up to 5%
up to 40 °C (< 104°F)
+
o
o
Caustics up to 5%
up to 80 °C (< 176°F)
+
–
–
Caustics at 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 80 °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
–
+
+
* depending on the installation position
7
8
Technical Data
Resistance of Sealing Materials
Operating Instructions · VARIVENT
®
Mixproof Valve M-C/2.0
Edition 2018-10-04
Содержание VARIVENT 24/7 PMO
Страница 69: ...Maintenance 69 Assembling 2 Hold carrier sleeve at Z using a hook spanner...
Страница 81: ...1 Spare parts list double seat valve M C 2 0 Fig 1 Spare parts list double seat valve M C 2 0 04 10 2018 81...
Страница 85: ...1 Spare parts list Switch bar T VIS A 15 Fig 1 Spare parts list Switch bar T VIS A 15 04 10 2018 85...
Страница 87: ...1 Spare parts list Switch bar T VIS M 15 Fig 1 Spare parts list Switch bar T VIS M 15 04 10 2018 87...
Страница 89: ...1 Dimension sheet double seat valve M C 2 0 Fig 1 Dimension sheet double seat valve M C 2 0 04 10 2018 1...
