Desuperheater
DS VARIFLOW
The ValtekSul VariFlow Series multiple nozzles desuperheaters are designed to combine excellent water atomization with high rangeability.
The VariFlow offers a large variety of nozzle combinations (number and sizes) in order to provide accurate control of steam temperature in whatever condition
Variable Area
Desuperheater
Size
Water: 1; 1½; 2; 3 in.
Steam: 3 and 4 in.
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Rating
ASME/ANSI 150 to 2500
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Connections
RF; RTJ; BW
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Cv Range
Up to 50:1
Rangeability
Up to 50:1
DM VARIBULL
The multiple design VariBull is equipped with several DM wall-mounted nozzles connected among themselves and welded to an injection chamber BW inserted into the steam pipe.
The nozzles of MDM design may have different size and settings, for top performances of desuperheating at various flowrates, and to improve turndown as well
Desuperheater
Size
Water Connetion:
Singles DM: 1/2 to 2 in.
Type MDM: 1 to 4 in.
Chamber or Pipe:
From 8 to 40 in.
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Rating
ASME/ANSI 150 a 2500
Greater size on request
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Rating
Water: ANSI 150-1500
Steam: ANSI 150-1500
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Materials
Desuperheaters:
Carbon or Cr-Mo Steel
Injection Chamber:
Same material as the pipe
DY VARISPRING
Desuperheater
Variable Area
The variable area spring assisted desuperheater with DM nozzles minimizes the limitation of fixed area types deriving from the fluid velocity reduction when flowrate decreases. This is obtainedby automatically reducing the passage area when flowrate decreases to maintain a fluid velocity consistent with the need of a good atomization
Size
Water Connetion: 1 to 3 in.
Steam pipe: 4 to 20 in.
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Rating
ASME/ANSI 150 to 1500
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Materials
Nozzle Body:
AISI​ 422
Plug:
17-4PH H1100
Spring:
Inconel X750