Coatings for valve parts to prevent erosion
US12234922B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2022 |
| Grant date | Feb 25, 2025 |
| Priority date | — |
| Expiry date | Apr 7, 2043 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K25/005
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
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 118. 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.