Flow shut-off valve device

摘要

A valve assembly having a valve-seal on a valve member that moves between an open and a closed position within a valve support housing for controlling fluid flow, particularly for use as a shut-off valve. In many embodiments, advancing the valve member sealingly engages the valve-seal with a valve seating area of the housing to close the valve and shut-off fluid flow through the housing, while retracting the valve member moves the valve-seal away from the seating area to allow fluid flow around the valve-seal and through the valve-seating area. In many embodiments, the valve member includes a proximal handle and angled ramp that engage with a helical ramp of the housing to translate rotation of the handle into axial movement of the member between open and closed positions.

主权项

1. A shut-off valve assembly, comprising:
a valve housing having a fluid flow conduit extending therethrough and a valve-seating surface within the fluid flow conduit; a valve member having a proximal end and a distal end, the valve member being axially movable between an open position and a closed position such that advancing the valve member distally moves the valve member to the closed position and proximally retracting the valve member moves the valve member to the open position, wherein the valve member is a single component; and a valve-seal attached to the distal end of the valve member and configured to sealingly engage with the valve seating surface when the valve member is in the closed position, wherein when the valve member is in the closed position, the valve member and/or the valve-seal includes a proximal facing surface in fluid communication with a pressurized fluid upstream from the valve-seal such that the pressurized fluid upstream of the valve-seal provides a force component in the distal direction against the proximal facing surface to provide a positive sealing pressure, wherein the proximal facing surface comprises a portion of the valve-seal.