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To
help you better gauge the usefulness of a seal
material in a given fluid environment,
we have compiled this Chemical Compatibility
Guide. It features over 2,000 different fluids
(liquids, gases, and solids) that your O-ring
seals may encounter in service.
This guide is based on volume
swell, and though excessive swell is perhaps
the most obvious sign of incompatibility, it
is not the sole indicator. Changes in physical
properties such as hardness and tensile
strength are common. Length of exposure and ambient
temperature will also undoubtedly affect
a material’s response to a chemical.
This
information is provided for educational purposes
only. It has been accumulated from multiple industry
publications and authorities. To the best of our
knowledge, it is complete and correct. R.L. Hudson
has not performed any tests or analysis to verify
the data contained herein, and the information
contained herein is not intended as, and shall
not serve as, any warranty or representation, either
expressed or implied. The user is solely responsible
for making any and all usage decisions. These decisions
should always be based on both an appropriate analysis
of the information and a thorough testing of the
products prior to actual field use.
CHEMICAL
COMPATIBILITY GUIDE
RECOMMENDATION CODES
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| 1= |
Excellent: No
more than 15% swell.
Any softening or surface degradation is
minimal. Material should perform well in all
but the most extreme conditions. |
| 2= |
Good: Up
to 30% swell. Minor softening or surface degradation
is likely, though static applications
may not be jeopardized. |
| 3= |
Poor: Up
to 50% swell. Chemical resistance is definitely
compromised, making the material unsuitable
for some static and many dynamic applications. |
| 4= |
Not
Recommended: More than
50% swell. Major softening and material
degradation are very likely. Usage should
be avoided and an alternative material
sought. |
| 5= |
No
Data Available: Material
response is unknown. Testing prior to actual
usage is needed to determine compatibility in
a given environment. |
CHEMICAL
COMPATIBILITY GUIDE
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“This
guide features over 2,000 different fluids (liquids,
gases, and solids) that your O-ring seals may encounter
in service.”
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