Counterflow valve

Details Counterflow valve Counterflow valve

1991-04-24

1993-11-09

Noland, Tom

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

73 3103, 137597, 1376252, 13762543, F16K 11056

Patent

active

052592332

ABSTRACT:
A counterflow valve for switching between flowing gas streams without undesirable interaction of the gas with any dead volume area or non-metallic surfaces or both, which valve contains a four-way double ported ball valve having a first and second input and a first and second output, first and second inlet duct, a back pressure regulator, adjustable flow control orifice and a valve outlet duct.

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patent: 5199295 (1993-04-01), Mettes
Journal of Physics E. Scientific Instruments, vol. 17, No. 4, Apr. 1984, pp. 263-264, Jones and Bott. "A Simple Fast Acting Gas Selection Valve".
Patent Abst. of Japan, vol. 11, No. 368 (M-647) 2 Dec. 1987 and JP-A-62 141 400 24 Jun. 1987.
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