Long-life leak standard assembly

Basford, James A; Mathis, John E; Wright, Harlan C

Title: Long-life leak standard assembly

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Abstract

The present invention is directed to a portable leak standard assembly which is capable of providing a stream of high-purity reference gas at a virtually constant flow rate over an extensive period of time. The leak assembly comprises a high pressure reservoir coupled to a metal leak valve through a valve-controlled conduit. A reproducible leak valve useful in this assembly is provided by a metal tube crimped with a selected pressure loading for forming an orifice in the tube with this orifice being of a sufficient size to provide the selected flow rate. The leak valve assembly is formed of metal so that it can be "baked-out" in a vacuum furnace to rid the reservoir and attendent components of volatile impurities which reduce the efficiency of the leak standard.

Inventors:

Basford, James A ^[1]; Mathis, John E ^[1]; Wright, Harlan C ^[1]

Oak Ridge, TN

Issue Date:: 1982-01-01

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

OSTI Identifier:: 864285

Patent Number(s):: 4343176

Assignee:: United States of America as represented by United States (Washington, DC)

Patent Classifications (CPCs):: G - PHYSICS G01 - MEASURING G01M - TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES

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G - PHYSICS G01 - MEASURING G01M - TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES
G01M3/207 - {calibration arrangements}

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Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: long-life; leak; standard; assembly; directed; portable; capable; providing; stream; high-purity; reference; gas; virtually; constant; flow; rate; extensive; period; time; comprises; pressure; reservoir; coupled; metal; valve; valve-controlled; conduit; reproducible; useful; provided; tube; crimped; selected; loading; forming; orifice; sufficient; size; provide; formed; baked-out; vacuum; furnace; rid; attendent; components; volatile; impurities; reduce; efficiency; reference gas; vacuum furnace; assembly comprises; flow rate; valve assembly; metal tube; selected pressure; leak standard; pressure loading; constant flow; standard assembly; valve useful; metal leak; /73/

Citation Formats


                    Basford, James A, Mathis, John E, and Wright, Harlan C. Long-life leak standard assembly.  United States: N. p., 1982. 
        Web.

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                    Basford, James A, Mathis, John E, & Wright, Harlan C. Long-life leak standard assembly.  United States.

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                    Basford, James A, Mathis, John E, and Wright, Harlan C. Fri .  
        "Long-life leak standard assembly".  United States.  https://www.osti.gov/servlets/purl/864285.

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@article{osti_864285,

  title        = {Long-life leak standard assembly},

  author       = {Basford, James A and Mathis, John E and Wright, Harlan C},

  abstractNote = {The present invention is directed to a portable leak standard assembly which is capable of providing a stream of high-purity reference gas at a virtually constant flow rate over an extensive period of time. The leak assembly comprises a high pressure reservoir coupled to a metal leak valve through a valve-controlled conduit. A reproducible leak valve useful in this assembly is provided by a metal tube crimped with a selected pressure loading for forming an orifice in the tube with this orifice being of a sufficient size to provide the selected flow rate. The leak valve assembly is formed of metal so that it can be "baked-out" in a vacuum furnace to rid the reservoir and attendent components of volatile impurities which reduce the efficiency of the leak standard.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1982},

  month        = {1}

}

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