Ball valve
First Claim
1. A ball valve comprising:
- a casing comprising an entrance, a valve chamber, an exit and a discharge orifice, wherein said discharge orifice communicates with ambient air when said ball valve is installed in a piping system;
a valve shaft hermetically passing through said casing;
a valve ball within said valve chamber connected to said valve shaft within said casing;
an entrance-side ring valve seat between said casing and said valve ball on the entrance side of said ball valve; and
an exit-side ring valve seat between said casing and said valve ball on the exit side of said ball valve, wherein said exit-side ring valve seat comprises a through hole passing through said exit-side ring valve seat between said valve ball and said discharge orifice in said casing;
said valve ball comprising;
a circulation hole through the valve ball, wherein said entrance in said casing is connected and disconnected to said exit in said casing by rotate-operating said valve shaft and said valve ball;
a first passage hole between said circulation hole and said entrance when said valve ball is positioned in a first disconnection state wherein said valve ball disconnects said entrance from said exit; and
a second passage hole between said circulation hole and said through hole in said exit-side ring valve seat when said valve ball is positioned in said first disconnection state.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention is a ball valve which may be attached to a fluid pipe for connection/disconnection between an entrance and an exit. More particularly, the present invention is a ball valve having a discharge orifice communicating with ambient air in addition to the entrance and the exit for connection/disconnection between the entrance and the discharge orifice and/or between the exit and the discharge orifice. The ball valve of the present invention may be attached to piping systems such as, for example, the secondary side of a steam trap, which blocks steam but automatically discharges condensed water, and is used for checking a discharging state of the primary side steam trap and/or releasing remaining pressure on the secondary side.
58 Citations
17 Claims
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1. A ball valve comprising:
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a casing comprising an entrance, a valve chamber, an exit and a discharge orifice, wherein said discharge orifice communicates with ambient air when said ball valve is installed in a piping system; a valve shaft hermetically passing through said casing; a valve ball within said valve chamber connected to said valve shaft within said casing; an entrance-side ring valve seat between said casing and said valve ball on the entrance side of said ball valve; and an exit-side ring valve seat between said casing and said valve ball on the exit side of said ball valve, wherein said exit-side ring valve seat comprises a through hole passing through said exit-side ring valve seat between said valve ball and said discharge orifice in said casing; said valve ball comprising; a circulation hole through the valve ball, wherein said entrance in said casing is connected and disconnected to said exit in said casing by rotate-operating said valve shaft and said valve ball; a first passage hole between said circulation hole and said entrance when said valve ball is positioned in a first disconnection state wherein said valve ball disconnects said entrance from said exit; and a second passage hole between said circulation hole and said through hole in said exit-side ring valve seat when said valve ball is positioned in said first disconnection state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A ball valve comprising:
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a casing comprising an entrance, a valve chamber, an exit and a discharge orifice, wherein said discharge orifice communicates with ambient air when said ball valve is installed in a piping system; a valve shaft hermetically passing through said casing; a valve ball within said valve chamber connected to said valve shaft within said casing; an entrance-side ring valve seat between said casing and said valve ball on the entrance side of said ball valve; and an exit-side ring valve seat between said casing and said valve ball on the exit side of said ball valve, wherein said exit-side ring valve seat comprises a through hole passing through said exit-side ring valve seat between said valve ball and said discharge orifice in said casing; said valve ball comprising; a circulation hole through the valve ball, wherein said entrance in said casing is connected and disconnected to said exit in said casing by rotate-operating said valve shaft and said valve ball; a first passage hole between said circulation hole and said entrance when said valve ball is positioned in a first disconnection state wherein said valve ball disconnects said entrance from said exit; and a third passage hole between said circulation hole and said through hole in said exit-side ring valve seat when said valve ball is repositioned to second disconnection state 180 degrees from said first disconnection state; wherein said first passage hole is between said circulation hole and said exit when said valve shaft and valve ball are in said second disconnected state. - View Dependent Claims (14, 15, 16, 17)
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Specification