47
Technical Data
Pipe Ends
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 regulations of FDA 21 CFR 177.2600 or FDA 21 CFR
177.1550.
Resistance:
•
+ = good resistance
•
o
= limited resistance
•
–
= no resistance
Pipe Ends
Table of resistance of seals
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 conditions
Dimensions for Pipes in DN
Metric
DN
Outside diameter
Wall thickness
Inside diam-
eter
Outside diameter
acc. to DIN 11850
25
29
1.5
26
x
40
41
1.5
38
x
50
53
1.5
50
x
65
70
2.0
66
x
