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RSD desuperheater has a ring design. It is suitable for reduction of the temperature when steam undergoes moderate load changes.
RSD desuperheater basically consists of hydraulic fine atomizing nozzles. It injects amount of water into a steam flow to lower the temperature of the steam. Highly efficient nozzles spray water at the outlet of the convergent pipe purposely profiled to accelerate the steam to be cooled and initialize its turbulent flow. Both increase rangeability of the desuperheater–RSD handles applications requiring load changes up to 20:1. Maintenance-free desuperheater has not any moving or quick wearing parts, but it does need the injection valve to control the coolant’s flow. As a rule, it is assembled between two flanges of the steam pipeline. There is variant with welded connections.