FLUID FLOW CONTROL APPARATUS FOR USE WITH FLUID VALVES
First Claim
1. An apparatus comprising:
- a plug of a sliding stem fluid valve, the plug having a first portion slidably coupled to a second portion, the first portion including a first bleed port, the second portion including a second bleed port opposing the first bleed port, the second portion to contact a seat of the fluid valve to close the fluid valve;
a cavity formed in an outer circumferential surface of the plug by the first portion and the second portion, an axial dimension of the cavity to decrease when the first portion slides toward the second portion, the decrease to radially outwardly displace a seal disposed in the cavity, the seal having a curved outer surface configured to engage an inner circumferential wall of a cage of the fluid valve in response to the second portion contacting the seat; and
a pin disposed in the first bleed port and the second bleed port, the pin to align the first portion and the second portion relative to a common longitudinal axis.
1 Assignment
0 Petitions
Accused Products
Abstract
Fluid flow control apparatus for use with fluid valves are disclosed. An example apparatus disclosed herein includes a plug of a sliding stem fluid valve. The plug has a first portion slidably coupled to a second portion. The first portion includes a first bleed port. The second portion includes a second bleed port opposing the first bleed port. The second portion is to contact a seat of the fluid valve to close the fluid valve. The example apparatus further includes a cavity formed in an outer circumferential surface of the plug by the first portion and the second portion. An axial dimension of the cavity is to decrease when the first portion slides toward the second portion. The decrease is to radially outwardly displace a seal disposed in the cavity. The seal has a curved outer surface configured to engage an inner circumferential wall of a cage of the fluid valve in response to the second portion contacting the seat. The example apparatus further includes a pin disposed in the first bleed port and the second bleed port. The pin is to align the first portion and the second portion relative to a common longitudinal axis.
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Citations
20 Claims
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1. An apparatus comprising:
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a plug of a sliding stem fluid valve, the plug having a first portion slidably coupled to a second portion, the first portion including a first bleed port, the second portion including a second bleed port opposing the first bleed port, the second portion to contact a seat of the fluid valve to close the fluid valve; a cavity formed in an outer circumferential surface of the plug by the first portion and the second portion, an axial dimension of the cavity to decrease when the first portion slides toward the second portion, the decrease to radially outwardly displace a seal disposed in the cavity, the seal having a curved outer surface configured to engage an inner circumferential wall of a cage of the fluid valve in response to the second portion contacting the seat; and a pin disposed in the first bleed port and the second bleed port, the pin to align the first portion and the second portion relative to a common longitudinal axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus comprising:
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a fluid flow control member of a fluid valve, the fluid flow control member having a first portion slidably coupled to a second portion, the first portion including a first bleed port, the second portion including a second bleed port opposing the first bleed port, the second portion to contact a seat of the fluid valve to close the fluid valve; a cavity formed in an outer circumferential surface of the fluid flow control member by the first portion and the second portion, an axial dimension of the cavity to decrease when the first portion slides toward the second portion, the decrease to radially outwardly displace a seal disposed in the cavity, the seal having a curved outer surface configured to engage an inner circumferential wall of a cage of the fluid valve in response to the second portion contacting the seat; and a pin disposed in the first bleed port and the second bleed port, the pin to align the first portion and the second portion relative to a common longitudinal axis. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification