Example aspects of a bushing assembly for a bonnet and stuffing box assembly, a bonnet and stuffing box assembly, and a method for using a bonnet and stuffing box assembly are disclosed. The bushing assembly for a bonnet and stuffing box assembly can comprise a stuffing box bushing, the stuffing box bushing defining an outer stuffing box bushing surface and a stuffing box bushing bore wall; and a bonnet bushing, the bonnet bushing defining an outer bonnet bushing surface and a bonnet bushing bore wall, the bonnet bushing bore wall and the stuffing box bushing bore wall together defining a bushing bore configured to receive a stem therethrough.

Example aspects of a bushing assembly for a bonnet and stuffing box assembly, a bonnet and stuffing box assembly, and a method for using a bonnet and stuffing box assembly are disclosed. The bushing assembly for a bonnet and stuffing box assembly can comprise a stuffing box bushing, the stuffing box bushing defining an outer stuffing box bushing surface and a stuffing box bushing bore wall; and a bonnet bushing, the bonnet bushing defining an outer bonnet bushing surface and a bonnet bushing bore wall, the bonnet bushing bore wall and the stuffing box bushing bore wall together defining a bushing bore configured to receive a stem therethrough.

In at least one embodiment, the present invention provides a self-cleaning valve having a valve body defining an internal cavity and having a first end, a second end, a perimeter wall extending between the first end and a second end, an inlet fluidly communicating with the internal cavity, an outlet fluidly communicating with the internal cavity and a stem bore fluidly communicating with the internal cavity, a valve stem having a first end and second end and operable for linear movement between a first open position and a second closed position, the valve stem received in the stem bore, the first end of the valve stem having a plug, the plug adapted to seal the inlet of the valve body when in the second closed position.

An example assembly includes: a valve body having a cavity therein, wherein the valve body comprises internal threads formed in a first-handed direction and an external feature; a knob having an internal feature configured to engage with the external feature of the valve body to allow the internal feature of the knob to move past the external feature of the valve body in a linear direction when assembling the knob on the valve body; and a needle disposed in the cavity of the valve body and having external threads formed in the first-handed direction and engaging with the internal threads of the valve body, the needle being coupled to the knob such that rotation of the knob and the needle results in linear movement of the needle within the valve body due to engagement of the external threads of the needle with the internal threads of the valve body.

A valve assembly (6000) for use with a valve body (7000) having a valve seat (7112) is disclosed, the valve assembly (6000) comprising: a cartridge (6200) threadably engaged with and extending away from the valve body (7000); a poppet (6500) slidably engaged with the cartridge (6200); a plate (6600) engaged with the poppet (6500); a plunger (6400) slidably engaged with the cartridge (6200) and slidably extending through the plate (6600); and a retainer (6450) captured between the plate (6600) and a surface of the poppet (6500), wherein the retainer (6450) is threadably engaged with the plunger (6400). The valve assembly (6000) can regulate fluid flow.

A function fitting is provided, for regulating the fluid flow in a pneumatic system, including a first connector configured to make a fluidic through connection with a pipe of the system, a second connector configured to make a fluidic through connection with a pipe of the system, a restriction element arranged between the first connector and the second connector and including a spool configured to allow or obturate the passage of fluid between the connectors, controller operationally connected to the spool and including a rotary electric motor configured to move the spool, and transmission configured to connect the motor and the spool operationally in such a way as to convert the rotary movement of the motor into a linear movement of the spool, and an electrical connector configured to electrically connect the controller to an external electrical system, wherein the controller includes an angular position transducer configured to detect the angular position of the motor.

A solenoid valve includes: a valve body; a sleeve which the valve body is accommodated; a solenoid casing connected to the sleeve on a first end side in an axial direction of the solenoid valve, and is closed on a second end side opposed to the first end side in the axial direction; a solenoid molded body in the solenoid casing; a yoke including a tubular portion inside the solenoid molded body, a flange portion projecting radially outward from an end portion of the tubular portion on the second end side; a movable iron core, which moves in the axial direction inside the yoke. The valve body is moved with the iron core by energizing a coil of the solenoid molded body, and the flange portion has an annular outer peripheral surface that is continuous, and is disposed on the second end side of the solenoid molded body.

A bonnet and stuffing box assembly includes a bonnet defining a bonnet bore; a stuffing box connected to the bonnet, the stuffing box defining a stuffing box bore, the stuffing box bore and bonnet bore defining an assembly bore; a bushing assembly received in the assembly bore and comprising a stuffing box bushing and a bonnet bushing, the stuffing box bushing defining a narrow portion disposed in the stuffing box bore and a wide portion at least partially disposed in the bonnet bore, the bonnet bushing disposed in the bonnet bore and confronting the wide portion of the stuffing box bushing, the bushing assembly defining a bushing bore extending through the stuffing box bushing and the bonnet bushing; and a stem extending through the bushing bore.

A valve assembly includes a valve body defining a flow passage and a body cavity perpendicular to the flow passage. A bonnet is secured to the valve body. A valve member is moveable between an open position and a closed position, the valve member blocking the flow passage in the closed position, and allowing flow through the flow passage in the open position. A valve stem is coupled to the valve member. A debris barrier circumscribes the valve stem. The debris barrier comprises a first disk shaped member with a central opening through which the valve stem is inserted, and notches that extend radially from the central opening to define petals with ends that abut the valve stem.

A valve assembly includes a valve body defining a flow passage and a body cavity perpendicular to the flow passage. A bonnet is secured to the valve body. A valve member is moveable between an open position and a closed position, the valve member blocking the flow passage in the closed position, and allowing flow through the flow passage in the open position. A valve stem is coupled to the valve member. A debris barrier circumscribes the valve stem. The debris barrier comprises a first disk shaped member with a central opening through which the valve stem is inserted, and notches that extend radially from the central opening to define petals with ends that abut the valve stem.