Long-life leak standard assembly. [Patent application]
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:
- Issue Date:
- OSTI Identifier:
- 6255152
- Assignee:
- Dept. of Energy
- DOE Contract Number:
- W-7405-ENG-26
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 47 OTHER INSTRUMENTATION; FLOWMETERS; CALIBRATION STANDARDS; LEAK DETECTORS; LEAK TESTING; STANDARDS; MASS SPECTROMETERS; VACUUM GAGES; DEGASSING; DESIGN; GASES; LEAKS; VALVES; CONTROL EQUIPMENT; EQUIPMENT; FLOW REGULATORS; FLUIDS; MEASURING INSTRUMENTS; METERS; PRESSURE GAGES; SPECTROMETERS; TESTING; 420200* - Engineering- Facilities, Equipment, & Techniques; 440300 - Miscellaneous Instruments- (-1989)
Citation Formats
Basford, J A, Mathis, J E, and Wright, H C. Long-life leak standard assembly. [Patent application]. United States: N. p., 1980.
Web.
Basford, J A, Mathis, J E, & Wright, H C. Long-life leak standard assembly. [Patent application]. United States.
Basford, J A, Mathis, J E, and Wright, H C. Wed .
"Long-life leak standard assembly. [Patent application]". United States.
@article{osti_6255152,
title = {Long-life leak standard assembly. [Patent application]},
author = {Basford, J A and Mathis, J E and Wright, H 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 = {Wed Nov 12 00:00:00 EST 1980},
month = {Wed Nov 12 00:00:00 EST 1980}
}