Long-life leak standard assembly
- Oak Ridge, TN
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.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4343176
- OSTI ID:
- 864285
- Country of Publication:
- United States
- Language:
- English
Similar Records
Long-life leak standard assembly
Some considerations in standard gas leak designs and their applications to computer control systems
Related Subjects
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/