temperature of the outlet steam. DeSuperheater can be classified into two:

a. Non-Integral type DeSuperheater: where DeSuperheater nozzle and water valve are separate units

b. Integral type DeSuperheater: where DeSuperheater is in-built with actuator so that there is no need of separatespray water valve

DeSuperheater nozzles are also classified into:

a. Venturi type: Where nozzle orifice is fixed irrespective of flow variation

b. Variable orifice: where orifice area opening will vary according to the flow and pressure variations

Applications

PRDS and DeSuperheaters are used in all Process and Power Plants where steam service is involved. Typicalapplications are in Boiler steam, Turbine by-pass, Attemperator, HRSG (Heat recovery steam Generation), and typicalProcess application where steam temperature and Pressure are critical.

Turbine Bypass valve

Auxillary PRDS

Turbine Gland Sealing

Pegging Steam

Attemperator

Benefits at a glance

Normally steam will be produced in the Boiler with high pressure and temperature and depending on the processrequirement, pressure and temperature will be reduced at the consumption point at the plant. This will help to reducethe energy losses during the transmission.

PRDS used in turbine bypass application help to protect the turbine during start-up, power trip and also for part loadgeneration. Turbine by pass valve will prevent venting of steam into atmosphere and allow the steam to be dumpedinto condenser so that energy can be saved to generate high temperature Boiler Feed Water.

Applications

Thermal Power Plants and Cogeneration Plants

All process plants like Fertilizers, Petrochemical, Refineries, Pharmaceuticals, Sugar Pulp & Paper, Steel etc.

CD4

Features

Variable nozzle type DeSuperheater

Rangeability 40:1

Suitable for installation in steam pipe size of 6“ to 32” with 45° & 60° installation

Available with integral spray water valve

Pressure rating upto ANSI 2500# class

Body material in A217Gr.WC9

Suitable for deltaP up to 40 bar for CD4 & 100 bar for CD 46 between water & steam

CD-46

Features

Designed for differential pressure of 100 bar

Other features are similar as that of cd-4

CDM

Features

Pipeline type DeSuperheater with multi nozzle (Variable type)

Rangeability 25:1

Suitable for installation in steam pipe size of 10“ to 60”

Suitable with external spray water valve

Pressure rating up to ANSI 2500# class

Body material in Carbon steel, A335P11, A335P22

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CMD-14

Features

Ventury type DeSuperheater with fixed nozzle

Rangeability 15:1

Suitable for installation in steam pipe size of 2” to 4” with installation at 90°

No external spray water valve required, available with integral actuator

Suitable for deltaP of 20bar between water & steam

Pressure rating up to ANSI 2500# class

Body material in A182F11 / F12 / F22

Wafer type design sandwiched between two pipe flanges

CMD-V

Features

Ventury type DeSuperheater with fixed nozzle

Rangeability 15:1

Suitable for installation in steam pipe size of ½ “ to 4” with 90° installation

Suitable with external spray water valve

Pressure rating upto ANSI 2500# class

Body material in A182F11 / F12 / F22

Wafer type design sandwiched between two pipe flanges

DeSuperheater Installation

Possible in all piping orientation

Do not install in elbows

Use clean water or condensate

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