Replaceable valve plug tip
AssigneeFisher Controls International LLC
InventorJonathan W. Richardson
Life of this patent
Estimating the term…
Abstract
A valve plug assembly includes a valve plug base, a valve plug tip, and a clamp that removably couples the valve plug tip to the valve plug base. The valve plug base includes a base body portion arranged for attachment to the valve stem and a base mating portion coupled to the base body portion. The valve plug tip has a tip body portion and a tip mating portion coupled to the tip body portion, the tip body portion having a sealing surface arranged to sealingly engage the valve seat. The clamp includes a clamp bore sized to receive at least a portion of the base mating portion and at least a portion of the tip mating portion.
Claims20
A valve plug assembly for use in a control valve assembly having a valve stem, a fluid flow passageway, and a valve seat disposed in the fluid flow passageway, the valve plug assembly comprising:
- a valve plug base extending along a plug base axis, the valve plug base including a base body portion arranged for attachment to the valve stem and a base mating portion coupled to the base body portion;
- a valve plug tip extending along a plug axis coaxially aligned with the plug base axis, the valve plug tip having a tip body portion and a tip mating portion coupled to the tip body portion, the tip body portion having a sealing surface arranged to sealingly engage the valve seat;
- and
- a clamp that removably couples the valve plug tip to the valve plug base, the clamp extending along a clamp axis coaxially aligned with the plug base axis and the plug axis, the clamp comprising a plurality of mating surfaces that define a clamp bore,
- wherein at least a portion of the base mating portion and at least a portion of the tip mating portion are disposed in the clamp bore such that the base mating portion and the tip mating portion each engage at least one of the plurality of mating surfaces of the clamp.
A method of forming a valve plug assembly for use in a control valve assembly, the control valve assembly having a valve stem, a fluid flow passageway, and a valve seat disposed in the fluid flow passageway, the method comprising:
- providing a valve plug base comprising a base body portion and a base mating portion coupled to the base body portion;
- arranging the base body portion for attachment to the valve stem;
- selecting a valve plug tip comprising a tip body portion and a tip mating portion coupled to the tip body portion;
- providing a clamp defining a clamp bore;
- disposing at least a portion of the base mating portion and at least a portion of the tip mating portion in the clamp bore;
- and
- inserting a plurality of fasteners into a plurality of apertures formed in the clamp, thereby removably coupling the valve plug tip to the valve plug base.
A valve plug assembly for use in a control valve assembly having a valve stem, a fluid flow passageway, and a valve seat disposed in the fluid flow passageway, the valve plug assembly comprising:
- a valve plug base extending along a plug base axis, the valve plug base including a base mating portion;
- a valve plug body tip extending along a plug axis coaxially aligned with the plug base axis, the valve plug body tip made of a ceramic or a carbide material;
- and
- a clamp that removably couples the valve plug body tip to the valve plug base.
Dependencies are inferred from the claim text.