To provide a fluid contact member whose corrosion resistance is particularly further improved than that in the related art. In order to solve this problem, a fluid contact member 10 includes a fluid contact portion 1 configured to be in contact with a fluid, the fluid contact portion 1 has a cobalt-based alloy phase 2 having a dendrite, and a compound phase 3 formed in an arm space of the dendrite and containing chromium carbide, and among a plurality of secondary arms 5 extending from one primary arm 4 constituting the dendrite, an average interval between adjacent secondary arms 5 is 5 μm or less. At this time, the average interval is preferably 3 μm or less. Further, the compound phase 3 is preferably formed discontinuously in the dendrite arm space.

A valve for controlling fluid flow, the valve comprising: a first plate comprising a plurality of first holes extending through said first plate; a second plate comprising a plurality of second holes extending through said second plate, the second holes being substantially offset from the first holes of said first plate; wherein said first plate and said second plate are arranged to form a cavity therebetween in fluid communication with the first holes of said first plate and the second holes of said second plate; and a flap disposed and moveable between said first plate and said second plate, said flap having holes substantially offset from the first holes of said first plate and substantially aligned with the second holes of said second plate; wherein said flap is operable to be motivated between said first and second plates in response to a change in direction of differential pressure of the fluid across the valve; wherein said first plate comprises a coating disposed on a surface of the first plate; wherein the first plate comprises a plurality of clearance regions, substantially aligned with the holes of the flap, in which a thickness of the coating is reduced; and wherein each of the clearance regions defines a respective inner region in which a thickness of the coating is generally greater than its defining clearance region.

A valve for controlling fluid flow, the valve comprising: a first plate comprising a plurality of first holes extending through said first plate; a second plate comprising a plurality of second holes extending through said second plate, the second holes being substantially offset from the first holes of said first plate; wherein said first plate and said second plate are arranged to form a cavity therebetween in fluid communication with the first holes of said first plate and the second holes of said second plate; and a flap disposed and moveable between said first plate and said second plate, said flap having holes substantially offset from the first holes of said first plate and substantially aligned with the second holes of said second plate; wherein said flap is operable to be motivated between said first and second plates in response to a change in direction of differential pressure of the fluid across the valve; wherein said first plate comprises a coating disposed on a surface of the first plate; wherein the first plate comprises a plurality of clearance regions, substantially aligned with the holes of the flap, in which a thickness of the coating is reduced; and wherein each of the clearance regions defines a respective inner region in which a thickness of the coating is generally greater than its defining clearance region.

A valve having a nose joined to a strike face. The strike face is configured to engage a tapered sealing surface formed on a component having a central fluid bore. The valve and component are configured to be installed within a fluid end. When the strike face of the valve engages the tapered sealing surface of the component, the nose is installed within the central fluid bore of the component. In operation, fluid is restricted from flowing between the strike face and the tapered sealing surface until fluid pressure has pushed the nose entirely out of the central fluid bore, thereby increasing the cross-sectional area available for fluid flow.

A valve having a nose joined to a strike face. The strike face is configured to engage a tapered sealing surface formed on a component having a central fluid bore. The valve and component are configured to be installed within a fluid end. When the strike face of the valve engages the tapered sealing surface of the component, the nose is installed within the central fluid bore of the component. In operation, fluid is restricted from flowing between the strike face and the tapered sealing surface until fluid pressure has pushed the nose entirely out of the central fluid bore, thereby increasing the cross-sectional area available for fluid flow.

The invention relates to an antiwear-coated metal component (1), in particular for a ball valve (6), the tribosurface of which component is at least partially provided with a multi-layer antiwear coating (2). The antiwear coating (2) has at least a metal adhesion layer (3a), an adhesion-promoting layer (3b) and at least one first cover layer (3c). The adhesion-promoting layer (3b) comprises a carbide-forming metal or a boride-forming metal. The at least first cover layer (3c) comprises a hydrogen-free tetrahedral carbon. The invention further relates to a method for applying an antiwear coating (2) to a metal substrate (9) in order to produce an antiwear-coated metal component (1) of this type. The invention further relates to a ball valve, comprising an antiwear-coated metal component (1) of this type and an antiwear coating (2).

The invention relates to an antiwear-coated metal component (1), in particular for a ball valve (6), the tribosurface of which component is at least partially provided with a multi-layer antiwear coating (2). The antiwear coating (2) has at least a metal adhesion layer (3a), an adhesion-promoting layer (3b) and at least one first cover layer (3c). The adhesion-promoting layer (3b) comprises a carbide-forming metal or a boride-forming metal. The at least first cover layer (3c) comprises a hydrogen-free tetrahedral carbon. The invention further relates to a method for applying an antiwear coating (2) to a metal substrate (9) in order to produce an antiwear-coated metal component (1) of this type. The invention further relates to a ball valve, comprising an antiwear-coated metal component (1) of this type and an antiwear coating (2).

This disclosure presents a pump body, such as a fluid end housing used in a reciprocating pump, which provides an integral seating or engagement surface (or a valve seat integrated with the pump body) for a valve member. The integral engagement surface removes the need for a separate, replaceable valve seat and can last as long as the service life of the fluid end housing. This saves multiple maintenance services during the service life of the fluid end housing, along with the associated down time, labor costs, and material costs for the new valve seats. The integral engagement surface thus performs as an integral valve seat to the pump body. In some embodiments, the integral engagement surface may be coated, heat-treated, or otherwise modified to increase its wear resistance, such as by including one or more wear-resistant inserts to at least partially contact the valve member.

This disclosure presents a pump body, such as a fluid end housing used in a reciprocating pump, which provides an integral seating or engagement surface (or a valve seat integrated with the pump body) for a valve member. The integral engagement surface removes the need for a separate, replaceable valve seat and can last as long as the service life of the fluid end housing. This saves multiple maintenance services during the service life of the fluid end housing, along with the associated down time, labor costs, and material costs for the new valve seats. The integral engagement surface thus performs as an integral valve seat to the pump body. In some embodiments, the integral engagement surface may be coated, heat-treated, or otherwise modified to increase its wear resistance, such as by including one or more wear-resistant inserts to at least partially contact the valve member.

A choke valve includes a choke body and a choke trim disposed within the choke body. The choke trim also includes an insert defining a plurality of positive beans and a plate defining an aperture. The plate is configured to contact and to rotate relative to the insert to cover and uncover the plurality of positive beans to adjust a fluid flow through the choke valve.