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Structures and Materials Division Research and Technology Directorate NASA Glenn Research Center

Tribology and mechanical Components Branch
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Seal Flow Test Fixture LFF1
The Linear Flow Fixture #1 (LFF1) test fixture is an ambient temperature seal flow rig designed to quantify the ability of seals to restrict gas flow through a defined interface gap. Removable seal holder cartridges facilitate testing of samples up to 12 in. long at varying levels of seal compression up to 100 psig (Figs. 2 and 3). For this test fixture, the seal interface is limited to sealing against a metallic surface. The results from testing in this rig are used to determine initial suitability for specific applications as well as generating data for fluid dynamics and thermal models.

  • Gas: Air
  • Pressure range: 0 – 100 psig
  • Flow range: 0 – 3000 SLPM
  • Gap range: 0 – 0.4 in.
  • Seal compression range: 0 – 55%
  • Seal diameter: Up to 1.5 in.
  • Seal length: Up to 12 in.
  • Sealing surface: Metallic
Photograph of flow fixture LFF1
Above: Photograph of flow fixture LFF1.

Cross-section of flow fixture LFF1
Above: Cross-section of flow fixture LFF1.

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Last Updated: April 21, 2009