Fisher Controls International LLC

A globe valve assembly can include a globe valve that can include a valve stem that defines a valve stem axis, a valve seat, a plug secured at a distal end of the valve stem, and a valve body that supports the valve seat. The valve body can define an inlet passage that extends between an inlet opening and the valve seat and an outlet passage that extends between an outlet opening and the valve seat.

A control valve includes a body having an inlet and an outlet, a valve seat positioned in a passageway of the body between the inlet and the outlet, and a valve plug movable between a closed position and an open position. A trim assembly is disposed within the body to provide guidance for the valve plug and to condition a flow of fluid through the control valve. The trim assembly includes a top portion and a bottom portion. A plurality of ribs extend between the top portion and the bottom portion and a plurality of arcuate lattice segments are removably secured between the top portion and the bottom portion and separated from adjacent lattice segments by a rib of the plurality of ribs. Each lattice segment has a plurality of passages that extend between an inner surface and an outer surface of the lattice segment.

Example valve bodies having resistant inner cores are disclosed herein. An example method includes forming a monolithic inner core of a valve body using a first material. The monolithic inner core defines a flow path of the valve body. The monolithic inner core has a thickness that varies between a first wetted portion of the flow path and a second wetted portion of the flow path different than the first wetted portion. The monolithic inner core provides erosion and corrosion resistant characteristics against process fluids. The method further includes overmolding an outer shell of the valve body to the monolithic inner core, the outer shell including a second material different than the first material.

An example apparatus is disclosed herein comprising a valve that includes a valve body defining a fluid passageway between an inlet and an outlet, a flow control member in the fluid passageway, a stem coupled to the flow control member, and a bonnet coupled to the valve body. The stem extends through a channel in the bonnet. A section of the channel forms a bore. The bore is threaded. The apparatus includes packing in the channel to form a seal between the bonnet and the stem. The apparatus includes a worm wheel nut threadably engaged with the bore. The stem extends through an opening in the worm wheel nut. The apparatus also includes a worm meshed with the worm wheel nut. The worm is to rotate the worm wheel nut to cause the worm wheel nut to move and adjust a load on the packing.

Systems, apparatus, articles of manufacture, and methods for rotary bearing maintenance are disclosed. An example apparatus includes a valve body defining a fluid passageway; a flow control member in the fluid passageway; a drive shaft coupled to the flow control member, the drive shaft extending through a shaft bore defined in the valve body; and a bearing around at least a portion of the drive shaft. The bearing includes: a first layer including a first material having a first coefficient of friction with the drive shaft when the first material is in contact with the drive shaft; and a second layer including a second material having a second coefficient of friction with the drive shaft when the second material is in contact with the drive shaft, the second coefficient of friction greater than the first coefficient of friction.

An example valve includes a valve body defining a fluid passageway between an inlet and an outlet, a plug, and a cage in the fluid passageway. The plug is disposed in the cage. The plug is moveable in the cage to control fluid flow through the fluid passageway. The cage includes an inner wall having first openings, an outer wall having second openings, the outer wall disposed coaxially around the inner wall, and an insert having third openings. The insert is disposed between the inner wall and the outer wall.

A control valve for use with process fluids at low temperatures. The control valve includes a valve body, a valve seat disposed in a fluid flow path of the valve body, a control element, and a valve stem coupled to the control element. The valve stem is configured to move the control element between a closed position, in which the control element sealingly engages the valve seat, and an open position, in which the control element is spaced from the valve seat. The control valve also includes an extension coupled to the valve body and including an extension cavity, a bonnet coupled to the extension to close the extension cavity, and a thermal displacer coupled to the valve stem and disposed within the extension cavity. The thermal displacer is configured to limit thermal conductivity between process fluid flowing through the fluid flow path and the bonnet.

A valve assembly can include a valve body and a seal ring. The seal ring can be seated in a seal cavity of the valve body. The seal ring can include a base that extends in an axial direction within the seal cavity, a leg that extends from the base, and a foot that extends from the leg. When a disk of the valve assembly is in a closed valve position, a primary seal can be formed between the foot and the disk and a secondary seal is formed between the base and a first wall of the seal cavity. The seal ring can accommodate disk drift at least partly via elastic bending, and can provide disk tracking via lateral movement within the seal cavity.

A feedthrough apparatus, such as for a passage through a barrier between a first compartment and a second compartment of a housing, can include a sleeve configured to sealingly couple with the passage, a printed circuit board (PCB) disposed through the sleeve and configured to provide electrical communication among the first compartment and the second compartment of the housing, and a seal disposed within the sleeve. The seal can be sealingly coupled to the PCB, and the sleeve, the PCB and the seal can be configured to hermetically seal the passage. The seal can include potting material and a V-groove connection.

Valve trim apparatus for use with fluid valves are disclosed. A cage for a valve trim includes a body defining an outer surface between a first end and a second end. The body has a central aperture, a first counter bore, and a second counter bore. A seal ring positioned in the first counter bore. A biasing element is provided in the second counter bore, where the biasing element imparts a force on the seal ring.