Valve stem packing assemblies may include at least one end ring and at least one sealing ring. The at least one end ring may include an inner ring and an outer ring. Valves include a valve body, a valve stem, and a valve stem packing assembly.

Valve stem packing assemblies may include at least one end ring and at least one sealing ring. The at least one end ring may include an inner ring and an outer ring. Valves include a valve body, a valve stem, and a valve stem packing assembly.

A butterfly valve that is capable of reducing torque and improves sealing performance. The butterfly valve 10 includes a shaft member 100, a tabular valve body that is provided on the shaft member 100, a case 310 that is attachable to and detachable from a through-hole 510 formed in an attachment member 500 to which the butterfly valve 10 is configured to be attached, a pair of bearings 320 that is provided in the case 310 and rotatably supports the shaft member 100, and a magnetic fluid seal that is provided between the pair of bearings 320 in the case 310 and seals an annular gap between the case 310 and the shaft member 100.

A valve seal device is for a valve in a pipeline. The valve seal device has four moveable seats configured for sealingly contacting a valve member, two seats being positioned on each side of the valve member. At least one of the moveable seats on each side of the valve member is an actuation seat being controllable from a non-contact position to a contact position where it seals against the valve member.

A valve seal device is for a valve in a pipeline. The valve seal device has four moveable seats configured for sealingly contacting a valve member, two seats being positioned on each side of the valve member. At least one of the moveable seats on each side of the valve member is an actuation seat being controllable from a non-contact position to a contact position where it seals against the valve member.

Aspects of the disclosure relate to locking assembly apparatus and methods for fluid ends, and associated components thereof. In one implementation, a locking assembly for fluid ends includes a first actuator and a second actuator disposed at least partially below the first actuator. The second actuator includes one or more coupling surfaces disposed in coupling engagement with one or more coupling surfaces of the first actuator. The locking assembly also includes a plurality of wedges disposed about the second actuator and movable between an unlocked position and a locked position.

Aspects of the disclosure relate to locking assembly apparatus and methods for fluid ends, and associated components thereof. In one implementation, a locking assembly for fluid ends includes a first actuator and a second actuator disposed at least partially below the first actuator. The second actuator includes one or more coupling surfaces disposed in coupling engagement with one or more coupling surfaces of the first actuator. The locking assembly also includes a plurality of wedges disposed about the second actuator and movable between an unlocked position and a locked position.

Bonnet and valve trim assembly and related methods are described. An example bonnet and valve trim assembly includes a bonnet structured to couple to a valve body via a valve body mounting flange, the bonnet including a cage mounting interface. A cage defining a body has a bonnet mounting interface to couple to the cage mounting interface of the bonnet. A retainer retains the cage mounting interface and the bonnet mounting interface to couple the cage and the bonnet. The retainer to enable axial movement between the cage and the bonnet when the retainer is coupled to the cage and the bonnet.

A valve assembly for a dose filling machine having a valve body, a rotor and a first end seal assembly. The valve body has a main supply bore, a rotor bore, an upper rotor piston bore, and a side rotor dispensing bore. The rotor is rotatably positioned in the rotor bore. The first end seal assembly comprising a first end rotor seal engaging the valve bore and the rotor. A first end inner plate overlies the first side of the valve body and the first end rotor seal. The first end outer plate includes a bearing positioned within an opening thereof. A transverse slot extends from the opening to an outer edge so that a leak beyond the first end rotor seal proceeds through the transverse slot away from the bearing.

A valve bonnet system including an emergency shut-off feature is presented. A bonnet can include a fluid inlet and a stopper inlet. A stopper member can be coupled with the stopper inlet, and engaging of the stopper member can effectively seal a channel of the fluid inlet to prevent the egress of liquid from a valve stem cavity of the valve through the fluid inlet channel. A stopper member can include a stopper, a gland nut, and a gland collar, and the stopper can be operated via a wrench head on the stopper. These principles can be applied to existing bonnets in the art with pre-existing fluid inlets, such that these bonnets can be improved to incorporate an emergency shut-off feature.