" RF" In the field of valves, it usually represents the abbreviation of Raised Face, which is a type of flange valve. Raised Face flange is a standard flange interface used to connect valves, pipelines, and other equipment. The characteristic of the Raised Face flange is that there is a slightly raised plane on the surface of the flange, which is used to tightly seal the interface between the two flanges.

RF flange valves are typically connected to RF flanges to ensure sealing performance. This type of flange valve is commonly used in high-pressure and high-temperature applications because the design of the Raised Face flange can provide better sealing performance to prevent fluid leakage.
Therefore, RF flange valves refer to valves connected using Raised Face flanges, typically used in industrial applications that require high pressure and high temperature sealing.