DFA | Fisher™ DFA Variable Geometry Desuperheater | Fisher

Fisher™ DFA Variable Geometry Desuperheater

The Fisher DFA (Desuperheater with Flexible Architecture) incorporates both a water control element and a variable geometry; mechanically atomized; self-contained desuperheater for moderate to high flow variation. The DFA is installed through a flanged connection on the side of an NPS 8 or larger pipeline.

• Custom designed bodies with a probe-style desuperheater; matched with multiple trim styles are able to meet almost any face-to-face; piping; or application requirements.
• Optimized spray pattern with AF nozzle technology allows for a wide operating range to achieve optimal mixing and quick vaporization at all flowing conditions.
• Nozzles can be easily removed; maintained; or replaced without having to replace the entire unit.
• The nozzle mount is engineered to minimize the potential for excitation due to vortex shedding and flow induced vibration.
• Multiple nozzle configurations are available to provide medium to large amounts of spraywater to cool steam to the required temperature.
• Uses a forged construction; optimized to move weld joints away from high stress regions.
• An integral thermal liner inside the desuperheater body pipe minimizes the potential for thermal shock when cool water is introduced.
• Increased wear-resistance of hardened; stainless steel trim means longer lasting service. When inspection or maintenance is necessary; the body can stay in the pipeline during removal of trim parts. Maintenance is simple and can easily be performed u
• Rugged seat guiding and cage guiding provides increased valve plug stability; which reduces vibration and mechanical noise.
• Valve trim is capable of full pressure drops and; in most cases; common with the Fisher easy-e™ and HP valves which reduces trim inventory costs.