Fluid pressure control device having a throttling element seal
First Claim
1. A fluid flow control device comprising:
- a body defining an inlet, an outlet, and a fluid flow path extending from the inlet to the outlet;
a valve seat ring coupled to the body and defining an orifice through which the fluid flow path passes;
a cage coupled to the body and defining an interior bore, the cage including at least one passage through which the fluid flow path passes;
a throttling element sized for insertion into the cage interior bore and movable along an axis between a closed position, in which the throttling element engages the valve seat ring, and an open position, the throttling element defining a sealing surface located on an interior perimeter of the throttling element and oriented substantially parallel to the axis; and
a seal carried by a portion of the valve seat ring and positioned to engage the sealing surface when the throttling element is substantially in the closed position, thereby to restrict fluid flow through the valve seat ring orifice, the seal further positioned to disengage the sealing surface when the throttling element is moved to the open position.
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Accused Products
Abstract
A fluid flow control device includes a body defining an inlet, an outlet, and a fluid flow path extending from the inlet to the outlet. A valve seat ring is coupled to the body and defines an orifice through which the fluid flow path passes. A cage is also coupled to the body and defines an interior bore, wherein the cage includes at least one passage through which the fluid flow path passes. A throttling element is sized for insertion into the cage interior bore and movable along an axis between open and closed positions. The throttling element defines a sealing surface oriented substantially parallel to the axis. A seal is positioned to engage the sealing surface when the throttling element is substantially in the closed position, thereby to restrict fluid flow through the valve seat ring orifice.
32 Citations
6 Claims
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1. A fluid flow control device comprising:
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a body defining an inlet, an outlet, and a fluid flow path extending from the inlet to the outlet; a valve seat ring coupled to the body and defining an orifice through which the fluid flow path passes; a cage coupled to the body and defining an interior bore, the cage including at least one passage through which the fluid flow path passes; a throttling element sized for insertion into the cage interior bore and movable along an axis between a closed position, in which the throttling element engages the valve seat ring, and an open position, the throttling element defining a sealing surface located on an interior perimeter of the throttling element and oriented substantially parallel to the axis; and a seal carried by a portion of the valve seat ring and positioned to engage the sealing surface when the throttling element is substantially in the closed position, thereby to restrict fluid flow through the valve seat ring orifice, the seal further positioned to disengage the sealing surface when the throttling element is moved to the open position. - View Dependent Claims (2, 3, 4, 5)
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6. A fluid flow control device comprising:
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a body defining an inlet, an outlet, and a fluid flow path extending from the inlet to the outlet; a valve seat ring coupled to the body and defining an orifice through which the fluid flow path passes, the seat ring including a gland section having a channel recess opening outwardly away from a central axis; a cage coupled to the body and defining an interior bore, the cage including at least one passage through which the fluid flow path passes; a throttling element sized for insertion into the cage interior bore and movable along the axis between a closed position, in which the throttling element engages the valve seat ring, and an open position, the throttling element defining a sealing surface located on an interior perimeter of the throttling element and oriented substantially parallel to the axis; and a seal carried by the channel recess of the valve seat ring and positioned to engage the sealing surface when the throttling element is substantially in the closed position, thereby to restrict fluid flow through the valve seat ring orifice, the seal further positioned to disengage the sealing surface when the throttling element is moved to the open position.
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Specification