| Phelps is proud to present four new
quality Compressed Gasket Materials. These gasket
materials have been extensively
tested for pressure and high temperature performance.
Phelps is the only company selling this
gasket material
in the USA.
We have chosen two tests. The DIN 52913
and the Hot Compression
Test both demonstrate the high temperature resistance
of the gasket material.
Hot Compression Test
-
A force of 7250 PSI is applied to a
washer.
-
Heat is applied every minute the
washer is under pressure
and is raised at the rate of 10°C per minute. This
is done until 572°F
(300°C) is reached.
-
If the washer cracks before 572°F
(300°C) is reached,
the result is recorded at that temperature. When the
washer does not crack,
the amount of compression is recorded in percentage.
-
The test result for the low
temperature test, 68°F (20°C),
is recorded in percentage as well.
Example: Style 7010
Hot Compression Test
7250 PSI @ 572?F (300?C) 16%
Total
7250 PSI @ 68?F (20?C) 9%
Total
(1/16"
Thickness Used For
Testing)
The Competition
-
Some manufacturers publish the test
results for the high
and low temperature Hot Compression Test that need
to be added together
to show the actual high temperature test
results. This is shown only
in the fine print.
-
Other competitors publish test results
that are performed
at half the stress load, 3675 PSI. This of
course is not an accurate
Hot Compression Test. Still others will state
test results showing
no temperature.
-
We have tested some of our
competitors’ material to find
they failed the Hot Compression Test at 572°F
(300°C).
-
Phelps has chosen to disclose full and
accurate Hot Compression
Test results.
DIN 52913
-
Both temperature tests are performed
for 16 consecutive hours
under the stress load of 7250 PSI.
-
Test one is performed at a temperature
of 347°F (175°C).
-
Test two is performed at a temperature
of 572°F (300°C).
The test results are expressed in
retained stress in
PSI.
Example: Style 7010
DIN 52913 Stress Relaxation @ 7250
PSI (50 MPA)
16 Hrs @ 347?F (175?C) >
5510 PSI (38 MPA)
16 Hrs @ 572?F (300?C) >
4350 PSI (30 MPA)
The Competition
Some manufacturers will show a
value under DIN 52913
with no temperature stated.
The questions is: “what test
temperature was used”?
Conclusion
Our gasket materials can withstand
elevated temperatures
and high stress loads.
The higher temperature/pressure
resistance a material
has, the better the overall performance will be in
your application.
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