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Restrictive flow orifice : ウィキペディア英語版
Restrictive flow orifice
A Restrictive Flow Orifice (RFO) is a type of orifice plate. They are used to limit the potential danger of
an uncontrolled flow from, for example, a compressed gas cylinder by:〔(Matheson, Restrictive Flow Orifice ) accessed Sep 2011〕〔(RFO ) Stanford accessed Sep 2011〕
#limiting the accidental release of a hazardous gas (flammable, toxic, etc.) resulting from regulator or other component failure,
#restricting flow in a system in order to assure adequate pressure relief valve sizing and system over pressure protection, or
#restricting flow from bulk sources.〔Gas Flow Characterization of Restrictive Flow Orifice Devices, Sandia REPORT SAND97-1670, Jul. 1997〕
==Predicting Flow==
Correlations assist in predicting the flow of a particular gas or gas mixture through a RFO. This is done by first determining the
flow through the same RFO at the required pressure with a reference gas and then adjusting the specific gravity accordingly.
The pertinent equation for the reference gas of nitrogen (N2) is presented below.
Flow = \text
* \sqrt}}

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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