Measuring and testing – With fluid pressure – Leakage
Reexamination Certificate
2006-09-19
2006-09-19
Larkin, Daniel S. (Department: 2856)
Measuring and testing
With fluid pressure
Leakage
C073S040000, C137S312000, C137S557000
Reexamination Certificate
active
07107822
ABSTRACT:
Disclosed herein is an apparatus for on-line detection of leaky valve seals wherein the apparatus includes an isolation valve having at least one upstream seal, at least one downstream seal, a fluid flow diverter; an inner cavity isolated from a fluid flow path by the seals; a vent port disposed in fluid communication with the inner cavity; a vent valve disposed in fluid communication with the vent port; and a differential pressure sensor disposed in fluid communication with both the vent port and the fluid flow path. Also disclosed is a method of on-line detection of leaky valve seals wherein the method includes disposing at least one upstream seal, at least one downstream seal, a fluid flow path, and a fluid flow diverter in mutual fluid communication; isolating an inner cavity from the fluid flow path by means of the seals; disposing a vent port in fluid communication with the inner cavity; disposing a vent valve in fluid communication with the vent port; and disposing a differential pressure sensor in fluid communication with both the vent port and the fluid flow path. The method can also be used to detect the presence of a defective fluid flow diverter while an associated fluid transport system remains on-line.
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Summers Angela E.
Zachary Bryan A.
Arnold & Ferrera, L.L.P.
Ferrera Raymond R.
Larkin Daniel S.
Sis-Tech Applications, L.P.
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