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Knowledge for
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Materials of Construction - Gaskets
(Strong Acid)
October 03, 2001
Introduction
The following are recommended gaskets for use in strong
sulphuric acid service.
Acid Concentration : 90% to 100% H2SO4
Temperature: 248°F (120°C)
The ability of a gasket to effect a seal depends not only on
the quality of the materials, but also on the thickness of the material, the design of the
flanges, the amount of pressure exerted on the gasket by the bolts, and how the gasket is
assembled into the flanges and tightened. Consult the manufacturer for specifics
regarding your application.
| Manufacturer |
Garlock |
Durabla |
Thermoseal Inc. |
| Designation |
GYLON 3500 |
GYLON 3540 |
GYLON 3545 |
DURLON 9000 |
KLINGERtop-chem-2000
|
| Colour |
Fawn with Black Brand |
White with Black
Brand |
White with Black
Brand |
|
|
| Compositon |
PTFE with Silica |
Microcellular PTFE |
Microcellular
PTFE |
PTFE with Silica |
PTFE |
Temperature - Maximum
- Minimum
(Continuous) |
500°F (260°C)
-350°F (-212°C) |
500°F (260°C)
-350°F (-212°C) |
500°F (260°C)
-350°F (-212°C) |
520°F (271°C)
-350°F (-212°C) |
|
| Pressure - Maximum (Continuous) |
1200 psig (83 bar) |
1200 psig (83 bar) |
1200 psig (83 bar) |
1500 psig (103 bar) |
|
Compressibility Range
(ASTM F36) |
7-12% |
70-85%
(1/16" thickness) |
60-70%
(1/16" thickness) |
8-16% |
2%
(ASTM F36J) |
Recovery
(ASTM F36) |
40% |
8%
(1/16" thickness) |
15%
(1/16" thickness) |
40% |
55%
(ASTM F36J) |
M Values : Thickness
- 1/16" |
5.0 |
3.0 |
2.6 |
- |
|
| - 1/8" |
5.0 |
3.0 |
2.0 |
- |
|
| - 3/16" |
- |
2.0 |
2.0 |
- |
|
| - 1/4" |
- |
2.0 |
7.0 |
- |
|
Y Values : Thickness
- 1/16" |
2750 psi |
1700 psi |
1500 psi |
- |
|
| - 1/8" |
3500 psi |
2200 psi |
2200 psi |
- |
|
| - 3/16" |
- |
2200 psi |
2200 psi |
- |
|
| - 1/4" |
- |
2500 psi |
3700 psi |
- |
|
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Samples
| Gylon 3450 |
|
| Gylon 3454 |
|
| DURLON 9000 |
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