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Fisher™ DFA Variable Geometry Desuperheater
FISHER?DFA可变几何减温器FISHER DFA（具有柔性结构的减温器）兼有水控制元件和可变几何、机械雾化、自给式减温器，适用于中高流量变化。DFA是通过NPS 8或更大管道侧的法兰连接安装的。
FISHER?DFA可变几何减温器FISHER DFA（具有柔性结构的减温器）兼有水控制元件和可变几何、机械雾化、自给式减温器，适用于中高流量变化。DFA是通过NPS 8或更大管道侧的法兰连接安装的。
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 replac 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 uRugged 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.
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