F - Mech Eng,Light,Heat,Weapons – 17 – D
Patent
F - Mech Eng,Light,Heat,Weapons
17
D
F17D 1/02 (2006.01) B01F 3/02 (2006.01) F17D 5/02 (2006.01)
Patent
CA 2145160
A tracer gas line and a carrier gas line are used to provide a tracer gas, such as helium, and a carrier gas, such as nitrogen, for blending. A back pressure controlling regulator is positioned in the tracer gas line and is controlled by a signal from the carrier gas line, so that the tracer gas pressure matches the carrier gas pressure under varying carrier gas flow and/or downstream pressure conditions. The two gas lines are piped to a common discharge manifold, and contain valves or orifices adapted to maintain the same carrier and tracer gas flow proportions independent of changes in carrier flow or pressure.
Praxair Technology Inc.
Sim & Mcburney
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