Patent application number | Description | Published |
20100116365 | REMOTELY READABLE VALVE POSITION INDICATORS - Remotely readable valve position indicators and related methods are described. An example valve position indicator includes a wireless identifier device coupled to a valve stem or shaft to move with the valve stem or shaft. The wireless identifier device is to convey information indicative of the position of the valve stem or shaft to a remote wireless electronic reader. The example valve position indicator also includes a shielding body to prevent the wireless identifier device from conveying the information to the remote wireless electronic reader when the valve stem or shaft is in a first position and to permit the wireless identifier device to convey the information to the remote wireless electronic reader when the valve stem or shaft is in a second position. | 05-13-2010 |
20100187454 | ACTUATOR HAVING AN OVERRIDE APPARATUS - Actuators having override apparatus are described herein. An example actuator having an override apparatus includes a first actuator stem coupled to a control actuation member. The override apparatus is operatively coupled to the actuator. A spring is coupled to an override member to move the first actuator stem to a predetermined position in response to an override condition. | 07-29-2010 |
20100319799 | FLUID PRESSURE REDUCTION DEVICES - An example fluid pressure reduction device includes a plurality of nested cylinders forming a hollow structure comprising an inner surface and an outer surface. The device also includes a plurality of passageways extending between the inner and outer surfaces through the nested cylinders. At least one of the cylinders includes first apertures substantially differently shaped from second apertures in a second one of the cylinders. At least one of the first apertures has a first wetted perimeter that is greater than a second wetted perimeter of another aperture having the same area as the at least one of the first apertures. | 12-23-2010 |
20120286183 | MULTI-PIECE FLOW CONTROL APPARATUS FOR USE WITH FLUID VALVES - Multi-piece flow control apparatus for use with fluid valves are described. An example flow control apparatus described herein includes a sleeve having first and second ends, the first end including a lip. A valve plug tip is disposed in the sleeve and has a shoulder engaged with an inner surface of the lip. An insert is disposed in the second end of the sleeve and engaged with the valve plug tip to urge the shoulder of the valve plug tip against the inner surface of the lip. The insert has an opening to receive a stem of the valve. | 11-15-2012 |
20120326885 | REMOTELY READABLE VALVE POSITION INDICATORS - Remotely readable valve position indicators and related methods are described. An example apparatus in accordance with the teachings of this disclosure includes a valve body, a valve stem and a fluid flow control apparatus coupled to the valve stem. The fluid flow control apparatus is longitudinally displaceable between a first position and a second position to control fluid flow through a flow aperture of the valve body. The apparatus also includes a valve position indicator including an identifier device coupled to the valve stem. In the first position, the wireless identifier device associated with a first value indicative of the first position of the fluid flow control apparatus. In the second position, the wireless identifier device associated with a second value indicative of the second position of the fluid flow control apparatus. | 12-27-2012 |
20130240770 | LOAD RELIEVING STEM CONNECTORS - Example apparatus including load relieving stem connectors are disclosed. An example apparatus includes a connector housing including an internal cavity therein, a load relieving body disposed in the internal cavity, and a shaft coupled to the load relieving body. In the example apparatus, the shaft is to rotate the load relieving body between a first position and a second position. | 09-19-2013 |
20140014859 | ACTUATOR APPARATUS HAVING INTERNAL PASSAGEWAYS - Actuator apparatus having internal passageways are disclosed. An example apparatus includes an actuator casing having a load apparatus to define an upper pressure chamber and a lower pressure chamber. The upper pressure chamber is opposite the lower pressure chamber. A yoke is to couple to the actuator casing to a fluid valve. An internal passageway is formed in a body of the yoke to fluidly couple a control fluid to at least one of the first or the lower pressure chamber. A fluid connector assembly is positioned in the actuator casing to fluidly couple the internal passageway to the upper pressure chamber. The load apparatus is between the internal passageway of the yoke and the upper pressure chamber. | 01-16-2014 |
20160109035 | GAS PRESSURIZED PACKING SYSTEM FOR CONTROL VALVES - A gas pressurized packing system for use in a control valve is disclosed. The gas pressurized packing system may include a first packing member, a second packing member and a pressurized gas supply. The first and second packing members may be arranged about, respectively, lower and upper portions of an operating member that extends through a bore in the control valve. The pressurized gas supply may be configured to pressurize a portion of the bore arranged between the first and second packing members. Also disclosed are a low fugitive emission control valve and a low fugitive emission control valve system. | 04-21-2016 |