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US 4,057,883 AGranted
Method of assembling rotary ball valve
AssigneeThe Lunkenheimer Company
InventorsGeorge J. Paptzun, Anthony B. Monnig
Life of this patent
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AssigneeThe Lunkenheimer Company
InventorsGeorge J. Paptzun, Anthony B. Monnig
Estimating the term…
A rotary ball valve includes a seat support integral with the valve body, a rotatable ball, a movable seat support, a retaining ring, and, on opposite sides of the ball, thin annular seating rings made from a material, such as tetrafluoroethylene. When the valve is assembled, the seating rings are deformed to engage the ball and supports and undergo a small amount of cold-flow outwardly toward interior passage walls of the valve body so that the outer periphery of the seat rings engages and forms a seal between the ball member and the interior passage wall. The seat-engaging surfaces of the seat supports each have grooves into which the seating rings cold-flow during valve assembly. Ribs are thus formed on the seating rings which keep the seats from rocking. The valve also provides an improved stem seal, including a Belleville washer confining a tetrafluoroethylene washer. In addition, the valve includes a handle having a novel projection for limiting movement of the ball to 90.degree. and for aligning the ball in its fully opened and fully closed positions.
A method of assembling a rotary ball valve having a valve body, a passageway therethrough defined by passageway walls, an integral seat support in said valve body extending into said passageway, a first flat annular seat ring made of a material susceptible to cold-flow, a ball valve member, a second flat annular seat ring made of a material susceptible to cold-flow, a movable seat support and an assembly retaining means, said seat supports each defining frustoconical seat ring support surfaces facing said ball valve member and wherein spaces between said frustonconical surfaces and said ball valve member increase in dimension from points near said passageway toward points radially outwardly thereof, the method comprising the steps of:
A method of assembling a rotary ball valve having a valve body, including passageway defining walls therein, a rotatable ball valve member, a seat ring on each side of said ball valve member, and seat ring supports having frustoconical seat ring support surfaces facing said ball valve member and engaging respective seat rings, said seat rings comprising flat annular discs having apertures therein and said method including the step of compressing said discs between said ball valve member and said frustoconical surfaces, respectively, and deforming each respective flat annular disc, incident to said compression, from said flat configuration into a frustoconical configuration tapered in cross-section to sealingly engage, respectively, said ball on one side of said seat ring and a respective support surface on another side of said seat ring and to sealingly engage said walls to provide a seal between said ball valve member and said walls.
A method of assembling a rotary ball valve having a valve body, a passageway therethrough defined by passageway walls, a rotatable ball valve member, seat rings, and seat ring supports having frustoconical seat ring support surfaces facing said ball valve member and intersecting said passageway walls, one of said frustoconical seat ring support surfaces movably intersecting said passageway walls, said seat rings comprising annular frustoconically shaped members having walls of uniform thickness and having apertures therein, and said method including the step of compressing said seat ring between said ball valve member and said frustoconical support surfaces, respectively, and deforming each respective seat ring incident to said compression, from said frustoconical configuration having walls of uniform thickness to a substantially frustoconical configuration seat ring having one concave wall sealingly engaging said ball, one frustoconical side sealingly engaging a respective frustoconical support surface on another side of said seat ring and one portion thereof sealingly engaging said passageway walls to form a seal between said ball valve member and said walls.
A method of assembling a rotary ball valve having a valve body, a passageway therethrough, an integral seat support in said valve body extending into said passageway and having a frustoconical seat support surface intersecting a wall of said passageway, a first flat annular seat ring made of a material susceptible to cold-flow, a ball valve member, said frustoconical seat support surface of said integral seat support facing said ball valve member, a second flat annular seat ring made of a material susceptible to cold-flow, a movable seat support having a frustoconical seat support surface facing said ball valve member and movably intersecting a wall of said passageway, and an assembly retaining means, the method comprising the steps of:
A method of assembling a rotary ball valve having a valve body, a passageway defined by walls therethrough, an integral seat support in said valve body extending into said passageway and having an inclined seat supporting surface intersecting said walls, a first annular seat ring made of a material susceptible to cold-flow and having a frustoconical configuration with walls of uniform thickness, a ball valve member, said inclined seat support surface facing said ball valve member, a second annular seat ring made of a material susceptible to cold-flow and having a frustoconical configuration with walls of uniform thickness, a movable seat support having an inclined seat supporting surface facing said ball valve member and movably intersecting a wall of said passageway, and an assembly retaining means, the method comprising the steps of:
Dependencies are inferred from the claim text.