Patent ID: 7506858
Filing Date: 2009-03-24
Classification: F16K

Abstract:
1. A butterfly valve comprising: a valve body having a passage; a valve shaft assembly comprising a first shaft portion and a second shaft portion in opposing spaced relation, an intermediate portion between the first shaft portion and the second shaft portion, and a support plate secured to the valve shaft assembly, the first and second shaft portions rotatably coupling the valve shaft assembly to the valve body, the intermediate member forming a chamber in fluidic communication with the passage, the support plate disposed within the chamber at a closed valve position approximately perpendicular to a direction of fluid flow through the passage; a plate secured to the support plate, the plate having an inner portion and a flange radially outward of the inner portion, the flange directed away from the support plate; and a tube disposed within the passage, the tube being friction fit or clearance fit over a portion of the plate.