BOMAFA develops and produces high-quality valves for steam, gas and water. The valves are used in nearly all kinds of power plants, chemical and petrochemical plants and a range of various other industrial applications.

BOMAFA Valves

Desuperheaters Customized designs for each application

Stable temperature control

Efficient vaporization

Avoidance of thermal stress

Power Chemstry Industry

BOMAFA Desuperheaters

Stable temperature control and high reliability

Processes in the chemical and petro-chemical industry as well as in power plants require hot steam with well-defined parameters.

When it is taken out of a different ano-ther process, it must be regulated in accordance to the required pressure and temperature.

Desuperheaters conduct the cooling of the steam in the pipe. The injection of cooling water is preferably carried out by BOMAFA desuperheaters in the region of the smallest flow cross-section, with correspondingly highest steam velocities.

Due to the streamlined design, unintended pressure losses are effectively prevented. Therefore: The more accurate the steam control, the more economical the result of the entire process.

Desuperheaters for each application

Customized design

Radial DesuperheaterVenturi DesuperheaterMotive-Steam assisted Desuperheater

Variable Nozzle Desuperheater

Center - Flow Desuperheater

From BOMAFA you get desuperheaters, precisely designed for your application. With the adequate type of injection, a high vapor quality is achieved as well as avoidance of down-time costs.

Motive-Steam assisted Desuperheater

Design Features

Vaporization assisted by motive steam

Best mixing of steam and water, even at minimal loads of 5%

Very short vaporization distances

Data: Motive-Steam assisted DesuperheaterDN of steam line from DN 100

DN of motive steam line from DN 25

DN of water line from DN 15

Connection of Desuperheater to steam line BWE or flange

Connection of Desuperheater to water line BWE or flange

No. of nozzles 1 bis 3

Min. steam velocity no limit

Turndown ratio 1 : 25

Desuperheating close to saturation temperature atminimal loads

At the motive steam assisted desuperheater, the atomization of water is achieved by separately supplied atomizing or motive steam at high pressure.

The motive steam is passed at high speed through the nozzle and cooling water injection. There it tears the injected water immediately into very fine droplets.

A motive steam nozzle is often positioned directly behind a pres-sure reduction system. It is taken from the high pressure side. Otherwise motive steam must be supplied from an outside source.

The motive steam with its correspondingly high pressure leads under optimized geometrical conditions to very high relative velocities between water droplets and vapor.

Design Features

Control of a wide load range from 10 to 100% of maximum steam capacity

No installations in steam flow required

Minimized pressure drop

Data: Venturi DesuperheaterDN of steam line DN 40 to DN 300

DN of water line from DN 15

Connection of Desuperheater to steam line BWE or flange

Connection of Desuperheater to steam line BWE or flange

Type of injection Annular gap or hollow cone nozzles

Min. steam velocity no limit

Turndown ratio 1 : 10

Highest controllability at low steamvelocities

By reducing the pipe cross-section, Venturi desuperheaters increase steam velocities which lead to greater turbulence and therefore to improved mixing behavior. The diameter of the pipe is approximately halved.

An efficient evaporation of the injection water and short evaporation distances even at low vapor velocity are characteristics of this desuperheater. End temperatures of 6-8 C above saturated steam temperature can be obtained.

The application range of Venturi desuperhe-aters reaches from DN 40 to DN 300. A hollow cone nozzle or an annular chamber is used for water for injection at the lowest point of the cross section, where highest turbulences in the steam flow occur.

Venturi Desuperheater

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Desuperheater

Radial Desuperheater

Design Features

Spring-loaded, individually replaceable nozzles

Even injection into the evaporation chamber

Avoidance of superimposed spray patters

Data: Radial DesuperheaterDN of steam line from DN 200

DN of water line from DN 25

Connection of Desuperheater to steam line BWE or flange

Connection of Desuperheater to steam line BWE or flange

No. of nozzles 3 - 24

Min. steam velocity 8 m/s

Turndown ratio 1 : 4

Injection of large water volumes

Radial desuperheaters are based on the principle of pres-surized atomization. Through the use of connected indivi-dual nozzles they_ are particularly suitable for the injection of large volumes of water at low-costs.

The individual nozzles are connected with a ring line. The control of water injection into the steam line is acchieved by a separate water - injection control valve and the spring loading of the individual nozzles.

Each nozzle is exchangeable which guarantee very fast and easy service works. The radiator is welded as a unit into pipes.

Special nozzles

By specific characteristics of the spring gap ope-nings in the nozzles, the injection water can be sprayed effectively even at low pressure differences.

Design Features

Exactly control of each nozzle possible

Wear-resistant sealing of all control elements

Contains integrated control valve for cooling water injection

Data: Variable Nozzle DesuperheaterDN of steam line fom DN 200

DN of water line from DN 15

Connection of Desuperheater to steam line Probe type, flanged

Connection of Desuperheater to steam line Flange

Type of nozzles Hollow cone nozzles

No. of nozzles 1 - 6

Min. steam velocity 8 m/s

Turndown ratio 1 : 12

Highest controllability at a wide load rage

Variable nozzle injection desuperheaters are used when precise control over a wide load range is required.

The injected volume of water is regulated by controlled opening and clo-sing of the single nozzles. The water pressure is held constant, so that variations in the pressure difference to the steam and related large water drops can be effectively prevented.

Integrated Water - injection Control Valve

Variable nozzle desuperheaters form a unit of integra-ted water valve and injection system.

The individual nozzles can be opened and closed by a movable piston with a wear-resistant seal.

Variable Nozzle Desuperheater

Center-Flow Desuperheater

Design Features

Injection takes place centrally in the vapor stream (Center Flow)

Control of cooling water injection through upstream control valve

Verschleißresistente, modulare Bauweise

Data: Center-Flow DesuperheaterDN of steam line from DN 80

DN of water line from DN 15

Connection of Desuperheater to steam line Probe type, flanged

Connection of Desuperheater to steam line Flange

Type of nozzles Hollow cone nozzles

No. of nozzles 1 - 6

Min. steam velocity 8 m/s

Turndown ratio 1 : 4

Superheated steam at narrow load range

The Center Flow desuperheater is preferably used for cooling in tem-perature ranges well above the saturated steam line and at narrow load ranges. As a service-friendly probe type desuperheater, it is flanged to water and steam pipe.

For the pressurized atomization, the water is injected by specialatomizing nozzles centrally into the stream flow.

Mostly hollow cone nozzles are used where the water is brought into a twist by a special geometry of the nozz-les and the pressure difference between the steam and water. The water is circularly atomized by the centrifugal force into fine droplets.

An upstream water - injection control valve regulates the water supply.

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