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Desuperheaters

Steam System Accessories

Applications Steam is often pressurized and superheated for efficientdistribution. To maximize heat transfer properties, the steam temperature must then be reduced to saturation level. Kadant desuperheaters are designed to reduce the temperature ofsuperheated steam for optimal heat transfer and efficiency.
Features

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Desuperheaters sizes range from 2� to 30�

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No moving parts or special supports required Ejector Type

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Optional control package available The ejector type desuperheater can be used over a wide range of steam flow rates and can operate with a turndown ratio of50:1. This design uses a small amount of high-pressure steam to atomize the cooling water in the mixing chamber. The expansion of the atomizing steam creates a depression in the mixing chamber while cooling water is ejected into thechamber. Both flows are thoroughly mixed and discharged into the main process steam. Kadant desuperheaters are custom designed for eachapplication and are available in various materials. The simpleyet efficient designs allow for direct installation into the steam pipeline with flanged connections. All desuperheaters can be installed in either horizontal, vertical, or diagonal pipelinesproviding there is sufficient straight run both upstream anddownstream of the desuperheater.
Benefits

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Steam system knowledge is applied to design and sizing

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Consistent process performance

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Improved heat transfer Spray Type The simple spray type desuperheater isused in applications where the steam load remains relatively constant.Cooling water is injected into thesuperheated steam through a nozzle. The steam temperature is reduced by evaporative cooling. The maximumturndown ratio of the spray typedesuperheater is 2:1. Venturi Type The venturi design uses the velocity of the steam to atomize the cooling water and effectively increase the turndown ratioto 10:1. The cooling water entering the unit is preheated in acirculatory chamber located at the entrance of the inner venturi. The water is then introduced into the inner venturithrough a series of engineered jet ports and is atomized by the steam.
Spray Type Ejector Type Venturi Type