Dresser, Inc.

Cyril Nicolas Vlassoff

Chad Eric Yates

Alexandre Serra Cachinhasky

Donald Stroman Sanders

Jeremy Asher Glaun

Mikhail Anisimov

Gheorghe Dodan

George Dodan

Wei Chen

A closure member is configured for use in a valve. These configurations may have a coating or conformal layer that may cover most, if not all, of the underlying material. This layer may include pre-propagated cracks that form due to thermal cycling prior to use in service. These pre-propagated cracks act as stress relief to accommodate for possible thermal stress that occurs due to different rates of thermal expansion between the underlying closure member and the coating. In one implementation, the layer may include a crack profile, which is engineered to direct formation of the pre-propagated cracks as well as to arrest crack development to a certain depth to maintain at least some integral layer of material over the underlying plug. This feature can extend service life of the plug, particularly in highly-erosive process fluids, like particle-entrained fluids commonly found in hydrocracking or refining operations.

Coatings for valve parts to prevent erosion

A closure member is configured for use in a valve. These configurations may include a plug with grooves or 'flutes' that extend along its length. Inserts in the flutes may comprise materials, like ceramics, that are different than the material that forms the core or base portion of the plug. These inserts are useful to slow erosion of the device, particularly in the flutes, which form an outwardly-facing surface that is subject to high velocity flow in the valve. This feature can extend service life of the plug, particularly in highly-erosive process fluids, like particle-entrained fluids commonly found in hydrocracking or refining operations.

Manufacturing a valve plug to reduce erosion

A valve housing is configured to maintain temperature of a valve. These configurations may incorporate paths or channels in structure of the valve that carry working fluid. Heating fluid, like steam or hot water, may flow through these paths to heat this structure. This feature can maintain or raise temperature of the working fluid to meet specifications, standards, or process parameters. In one implementation, the paths may have complex routes or geometry with curves, bends, or other feature that can maximize surface area that is available to distribute heat to the device. This geometry may require manufacturing techniques, like additive manufacturing, that can generate unitary or monolithic structures, particularly those structures that includes voids in the material to form the integral paths for the heating fluid.

Heating a valve body

A coating that is configured for use on parts of a control valve. The configurations may incorporate various material layers, preferably that form a layered structure on a base or substrate (for example, an Inconel body). In one implementation, the layered structure can be arranged as 'stacked' individual layers that exhibit different concentrations or ratios of materials, including by example tungsten carbide and nickel alloy. The concentration of tungsten carbide may increase from an innermost layer to an outer most layer. This feature can extend service life of the parts, particularly when in use with highly-erosive process fluids, like particle-entrained fluids commonly found in hydrocracking or refining operations. Manufacture of the layered structure on the parts may require use of additive manufacturing technology in order to deposit layers of material of varying composition and thickness on the unique fluted design contemplated herein.

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Saint-Georges des Groseillers, France

Cyril Nicolas Vlassoff