Patent ID: 8584705
Filing Date: 2013-11-19
Classification: F16K,G01F,Y10T

Abstract:
1. An valve for fluid flow control, comprising: a body with a first body side and a second body side; a main passageway through the body for conducting a fluid through the valve, the main passageway comprising a first passage opening at the first body side and a second passage opening at the second body side; a valve plug extending into the valve body and having a plug cavity positioned within the main passageway so that the fluid flowing through the main passageway may flow through the plug cavity; the plug cavity having the valve plug selectively rotatable in the body (a) to permit bidirectional fluid flow through the plug cavity and therefore through the valve in a “run” position, (b) to close the valve to the fluid flow in a “closed” position, and (c) to permit bypass fluid flow through the valve in a “bypass” position; and the valve plug having a ball check movably located within the plug cavity, the ball check movable by action of the fluid flowing through the main passageway into the plug cavity to seat against the valve seat to prevent the fluid flow through the valve, the ball check passable through the first opening, the plug cavity having a cavity top and a cavity bottom, an upward projection extending from the cavity bottom of the plug cavity into the plug cavity, the upward projection having a projection top, the projection top located below spaced-apart from and not in contact with the cavity top, the upward projection located for maintaining the ball check in the plug cavity and preventing the ball check from passing through the first opening and into the main passageway and from exiting the valve body.