GEA VARIVENT X R Series, Operating Instructions Manual

Page: 31 / 104

Medium Maximum operating temper-
atures EPDM FKM HNBR
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 100 °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 - + +
Temperature resistance of the sealing materials
Sealing materials General temperature resistance*
EPDM -40 to +135 °C
(-40 °F to 275 °F)
FKM -10 to +200 °C
(+14 °F to +392 °F)
HNBR -25 to +140 °C
(-13 °F to +284 °F)
* The general resistance of the material does not correspond to the maximum operating temperature.
3.2.4 Pipe ends - General table of measurements
INFO Not every valve is available in every size. For information about the availa-
ble sizes of valves, see 3.2.2 Technical data .
Dimensions for tubes in DN
Metric DN Outside diame-
ter Wall thickness Inside diameter Outside diame-
ter acc. to DIN
11850
15 19 1.5 16 X
20 23 1.5 20 X
25 29 1.5 26 X
40 41 1.5 38 X
3.2 Technical data - 31 / 104