Desuperheaters / Attemperators

Desuperheatersare used to lower the temperature of superheated steam to the desired set point by injecting atomized water into the superheated steam flow. IndiTech has a wide range of desuperheaters that provide precise steam temperature control for variousapplications. High performance custom designed nozzles ensure that water is atomized into a fine mist at all process conditions. The complete range of IndiTech desuperheaters is easy to install and requires low maintenance.

Variable Nozzle / Multi Nozzle Desuperheaters (Series 230)

IndiTech Series 230 variable nozzle desuperheaters are best suited for applications involving high load fluctuations. They are designed to controlthe quantity of spray waterat the point of water injection, thereby eliminating the need of a separate water control valve. This is achieved by coupling the desuperheater with an actuator and subsequently varying the number of injection nozzles in operation.Nozzle opening is controlled through precise positioning of the desuperheater stem in response to feedback from a controller and downstream temperature sensor. Temperature reduction occurs as the fine mist ofwater rapidly vaporizes into the superheated steam.

Technical Data

Steam Line Size 6” to 24” NB

Connection Size Steam Side Mounting Flange - 3”, 4” NB
Water Flange - 1”, 1 ½”, 2”NB

Pressure Rating ANSI #150, #300, #600, #900, #1500, #2500

Body MOC A105, A182 F11, A182 F22 Other materials available on request

Nozzle MOC SS 316 (Stellited optional)

Actuator Pneumatic, Electrical

End Connections Flanged

Rangeability 40:1

Features

  • No external cooling water control valve required.
  • Capable of maintaining steam temperature to saturation + 6°C.
  • High performance spray nozzles that atomize water into a fine mist. Nozzles are stellited for water pressure drop more than 25 bar.
  • Single piece forged body.
  • Wide range of Kv / Cv values by using special nozzle combinations.
  • All sealing joints (body-seat & body-nozzle holder) are stellited to provide leak tightness even after prolonged usage.
  • Spray nozzles vacuum brazed to the body to prevent leakage, thereby avoiding disturbancesin the water swirl pattern and atomization.
  • Approved under IBR (Indian Boiler Regulation Act).

Venturi Desuperheaters (Series 240)

IndiTech Series 240 venturi desuperheaters are best suited for applications where water pressures are marginally above steam pressure. The inlet section of the venturi desuperheater has a converging profile, where the steam velocity increases. The steam then passes through a vena contracta. The spray water is injected at the outlet section of the venturi desuperheater, where the rapidly diverging profile causes increased turbulence levels. This ensures quick vaporization and efficient mixing of the spray water into the superheated steam flow. The spraywater quantity is controlled by an external control valve whichresponds to feedback from a controller and downstream temperature sensor.

Technical Data

Steam Line Size 1” to 24” NB

Connection Size Water Flange - 1”, 1 ½”, 2” NB

Pressure Rating ANSI #150, #300, #600, #900, #1500

Body MOC A105, A182 F11, A182 F22 Other materials available on request

Venturi MOC SS 410, SS 431

Nozzle MOC SS 316 (Stellited optional)

End Connections Wafer Type, Butt Weld

Rangeability 10:1

Customized double venturi desuperheater available on request

Features

  • Ideal for water pressure marginally above steam pressure.
  • Efficient mixing due to water injection in highly turbulent& expanding steam after vena contracta.
  • No moving parts or special supports required.
  • Capable of maintaining steam temperature to saturation + 6°C.
  • High performance spray nozzles that atomize water into a fine mist.
  • Wide range of Kv / Cv values by using special nozzle combinations
  • Offers negligible steam pressure drop.
  • Approved under IBR (Indian Boiler Regulation Act).

Fixed Nozzle Desuperheaters (Series 250)

IndiTech Series 250 fixed nozzle desuperheaters are best suited for applications involvingminimalloadfluctuations. A fixed nozzle desuperheater utilizes high performancefixedgeometry nozzles to reduce the steam temperature by directly injecting water inside the superheated steam flow. The water enters the main desuperheater body,passes through the spray nozzlesand discharges into the steam line in the form of a fine mist. The spraywater quantity is controlled by an external control valve whichresponds to feedback from a controller and downstream temperature sensor.

Technical Data

Types 250-P Probe Type Fixed Nozzle Desuperheater 250-M Minicooler Type Fixed Nozzle Desuperheater

Steam Line Size Minicooler Type - 1” to 4” NB Probe Type - 6” to 40” NB

Connection Size Steam Flange - 1”, 2”, 3”, 4” NB (Minicooler Type) Steam Side Mounting Flange - 4”, 6” NB (Probe Type) Water Flange -1”, 1 ½”, 2” NB

Pressure Rating ANSI #150, #300, #600, #900, #1500

Body MOC Minicooler Type - A216 WCB, A217 WC6, A217 WC9 Probe Type - A106 Gr. B, A335 P11, A335 P22 Other materials available on request

Nozzle MOC SS 316 (Stellited optional)

End Connections Flanged

Rangeability 4:1

* Customized double venturi desuperheater available on request

Features

  • Fixed area orifice desuperheater.
  • Most simple and economical desuperheater
  • Capable of maintaining steam temperature to saturation +6°C.
  • High performance fixed geometry nozzles that atomize water into a fine mist. Nozzles are stellited for water pressure drop more than 25 bar.
  • No moving parts or special supports required.
  • Spray nozzles have in-built check valve to prevent entry of steam into water line.
  • Wide range of Kv / Cv values by using special nozzle combinations
  • Approved under IBR (Indian Boiler Regulation Act).

Spring Loaded Nozzle Desuperheaters (Series 260)

IndiTech Series 260 spring loaded nozzle desuperheaters are best suited for applications involving moderate load fluctuations. A spring loaded nozzle desuperheater utilizes high performancevariable geometrynozzles to reduce the steam temperature by directly injecting water inside the superheated steam flow. The spray water enters the nozzle chamber through multiple tangentially drilled holes, thereby causingwaterto swirl within the nozzle chamber. The spring, which is pre-compressed to a certain set pressure, keeps the nozzle plug pressed against the seat.As soon as the pressure differential between the water & steam exceeds thisset pressure, the plug lifts from its seat and the spray water exits through the small circumferential opening, in the form of a fine mist.Number of nozzles, spring range and spring set pressure is selected based on the process specifications.The spraywater quantity is controlled by an external control valve whichresponds to feedback from a controller and downstream temperature sensor.

Technical Data

Steam Line Size 6” to 40” NB

Connection Size Steam Side Mounting Flange - 4”, 6” NB Water Flange - 1”, 1 ½”, 2”, 3” NB

Pressure Rating ANSI #150, #300, #600, #900, #1500

Body MOC A106 Gr. B, A335 P11, A335 P22 Other materials available on request

Nozzle MOC SS 316 (Stellited optional)

End Connections Flanged

Rangeability 20:1

*Customized double venturi desuperheater available on request

Features

  • Variable area orifice, back pressure activated desuperheater.
  • Capable of maintaining steam temperature to saturation +6°C.
  • Set pressure & spring range selection ensures sequential opening of the individual nozzles.This leads to precise control of water flow and thereby temperature.
  • Wide range of Kv / Cv values by using special nozzle combinations.
  • High performance variable geometry nozzles that atomize water into a fine mist.
  • Replaceable individual nozzles.