Patent ID: 6811141
Filing Date: 2004-11-02
Classification: F16K

Abstract:
A valve for controlling flow of a fluid therethrough, the valve comprising:a conduit having an internal surface; a piston disposed at least partially within the conduit, the piston having a longitudinal axis and including a pilot tip at an upstream end of the piston; the piston being movable between a first position, in which the piston is seated on a valve seat, thereby preventing flow of the fluid through the valve, and a second position, in which the piston is spaced apart from the valve seat to permit flow of the fluid through the valve; and the pilot tip having at least one operative surface configured for engagement with fluid flowing through the valve such that the fluid urges the piston transversely relative to the longitudinal axis upon movement of the piston between the first position and the second position, causing the piston to engage a part of the conduit's internal surface.