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CONFIDENTIAL
AIXTRON
- Dokumentation
Maintenance
System Manual
Information on elastomer seals
CRIUS II
6
6.5
Information on elastomer seals
There are two basic types of ring-shaped elastomer seals:
•
Sealing ring: Elastomer cord whose ends have been glued or vulcanized
together
•
O-ring: Molded as one piece
6.5.1
Materials
Most elastomer seals are made of the following materials:
Tab. 6-13
Common elastomer seal materials
Solvents
6.5.2
Checking elastomer seals
1
Remove the seal from the sealing groove
Visual inspection
2
Inspect the seal. It must be:
•
Regular in diameter
•
Free from noticeable gluing joints
•
Free from any damage, such as cuts or swellings. See Fig. 6-3,
145.
Trade name
Abbreviation
Material
Temperature
range
Buna-N, Perbu-
nan
NBR
Nitrile rubber
-30…+100 °C
Viton
FKM, FPM
Fluorocarbon
rubber
-20…+200 °C
Kalrez
FFKM, FFPM
Perfluorocar-
bon rubber
-15…+230 °C
WARNING!
Unsuitable solvents.
Acetone, methanol and ethanol are unsuitable solvents. These chemi-
cals attack seals made of nitrile and fluorocarbon rubber (e.g. Perbunan
and Viton). In addition, methanol is toxic.
Avoid these solvents. Use isopropanol instead.
NOTE:
Be careful not to scratch the seal or the groove. Never use hard tools
(e.g. screwdriver) to remove a seal.
