General Test Method

ARLA Test Fixture
ARLA Test Fixture
  1. Place the gasket in the ARLA fixture
  2. Measure the distance between platens
  3. Load the gasket to initial compressive stress
  4. Measure the stud length
  5. Measure the distance between platens
  6. Measure the leak rate (using a Helium Mass Spectrometer) using helium gas at 800 psig
  7. Age by placing the loaded fixture in a non-circulating air oven
  8. Remove the fixture from the oven and cool to room temperature
  9. Measure the stud length
  10. Measure the distance between platens

Test Results for GORE® GR Sheet Gasketing

  Gasket Thickness % Relaxation (Average of 3 Tests) Helium Leak Rate before aging (mg/s) Helium Leak Rate after aging (mg/s)
ARLA
5000 psi compressive stress
  • 34.5MPa (5000 psi)
  • 4 days at 315°C (600°F)
  • 55.2bar (800 psig) Helium
 1/16" 30.77 1.04E-04 1.42E-05
1/8" 43.19 1.04E-03 <1.0E-7

 

Test Results for GORE® Universal Pipe Gasket

  Gasket Thickness % Relaxation (Average of 3 Tests) Helium Leak Rate before aging (mg/s) Helium Leak Rate after aging (mg/s)
ARLA
  • 34.5MPa (5000 psi)
  • 4 days at 315°C (600°F)
  • 55.2bar (800 psig) Helium

1.5 mm
1/16"

 23.34 2.86E-05 <1E-07
3.0 mm
1/8"		 51.63 1.29E-04 <1E-07

 

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