- Offer Profile
- Environmentally friendly and energy-efficient chimney systems made of stainless steel, components for chimney technology and heat recovery systems – for single room fireplaces in private buildings up to complex flue gas system solutions for trade and industry. Whether new construction or modernisation, we offer chimney systems and technology for every application. On request, we can take over the realisation of your project from the planning stage, through design and manufacture of the components, to assembly and turnkey handover.
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Raab Gruppe
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We are the Raab Group
With our brands Raab, Kutzner + Weber, NET and BOMAT, we are a leading supplier of environmentally friendly and energy-efficient stainless steel exhaust system solutions. Our philosophy is the “intelligent chimney”, a system of intelligently matched components to reduce emissions and realize energy savings.
Our product portfolio includes stainless steel flue gas systems, chimney components – such as fine dust particle separators, draught regulators, flue gas dampers, silencers, chimney fan – and heat recovery systems, both for private buildings and for commercial and industrial properties.
Perfectly matched to each other, these components ensure safety, equipment efficiency and emission reduction. All parts are made in Germany.
NET Solutions for heat recovery
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NET — NEW ENERGY TECHNOLOGY
NET has been active in the field of heat recovery for over 20 years. NET has been part of the Raab Group since 2015.
Fossil fuel saving is our profession. For us, this task is not a business area like any other, because reducing the consumption of these fuels is a question of humanity’s existence. Every company has untapped potential for saving fossil fuels. It is our goal to help you to use this potential in your business as well.
The variety of different situations in production plants requires individual solutions in each case. In doing so, we are looking for ways that are already economical for users today, even with the still low energy prices.
Manufacturing our products on the “extended workbench” makes us flexible in case of fluctuating order situation and enables us to offer a wide range of products. The long-standing, good cooperation with our manufacturers guarantees at the same time a high flexibility and a consistently good quality.
Thermojekt® R and RB
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Thermojekt® R and RB finned tube heat exchangers
The Thermojekt® R or RB is an efficient heat exchanger for heat recovery from clean and slightly polluted hot air or exhaust gases from oil and gas firing as well as process air up to 400 °C. Higher temperatures are possible on request.
This has a register of 12.5 mm high finned tubes made of high-alloy stainless steel (1.4571 / 1.4521).
The extendable register allows for easy and thorough cleaning. This is necessary if deposits have formed on the heat exchanger surfaces after prolonged operation.
During cleaning, the housing remains fixed. The register is extended after loosening the screw connection.
Thermojekt® SK
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Thermojekt® SK vapour condenser
The Thermojekt® SK is a very efficient heat exchanger for heat recovery from the condensation heat of polluted humid air such as baking vapours or fume extraction systems contaminated with suspended particles.
With these units, the high condensation heat of the water vapour in the steam can be recovered.
The extendable register consists of plain tubes made of high-alloy stainless steel (1.4404/1.4571), which are very easy to clean.
Thermojekt® G and GB
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Thermojekt® G and GB plain tube heat exchangers
The Thermojekt® G and GB is used for heat recovery on boilers operated with solid, liquid or gaseous combustibles.
The flue gas heat exchanger of the type series G and GB has a extendable register and is designed for flue gas temperatures up to 400°C.
On request, NET flue gas heat exchangers can also be produced as special designs for higher flue gas temperatures up to 500°C or even up to 1000°C.
Control engineering
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Control engineering
The electronic control TJ-HRC is used to control the flow temperature, toggling bypass damper, if applicable controlling three-way mixing valve incl. sensor package. This is available in different versions.
Variant speed control
The main component of this version is a control of the charging circuit by a speed-controlled charging pump. This control is preferably suitable for heat exchangers of the Thermojekt R/RB type.
Accessories for NET heat exchanger
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- Control TJ-HRC
Electronic control for regulating the flow temperature, switching the bypass damper, controlling the 3-way mixing valve if necessary, including sensor package. - Motor valve – 3-way mixer
Motor valve – 3-way mixer with female thread incl. Screw connection set. - Actuator
3-way mixing motor steady 0…10 V that fi ts mixer MV and control TJ-HRC - Balance valve
Tacosetter, female thread brass, TBmax 100 °C, PBmax 10 bar. - Connection set for heat exchanger with alkon port
Connection set for heat exchangers with Alkon ports includes two adaptors: Alkon sleeve side/smooth and Alkon socket side/smooth and two Alkon tension strips - Ceramax high performance lubricant
Sealing paste Ceramo up to 600 °C. - Standard connection set
Standard Connection Set includes 2 armoured tubes, 1 T-piece with reduction for thermowell 1/2″, 1 safety temperature limiter, 1 safety temperature monitor, 2 ball valves and 2 thermowells.
- Control TJ-HRC
General description heat exchanger
- The most effective use of energy is increasingly coming to the fore. The thermal energy from flue gases can be utilised with the help of heat exchangers.
Here, the flue gas heat exchanger transfers the waste heat of the flue gas to the water that flows through the heat exchanger’s register.
This heats the water and cools the flue gas. The heat recovered from the flue gas can be used elsewhere. This results in considerable energy cost savings, especially in energy-intensive industrial operations.
When does heat recovery make sense?
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Today, rising energy prices allow for shorter and shorter payback periods.
Flue gas temperature, burner output and operating hours determine how long the amortisation takes.
Extendable register
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The extendable register allows for easy and thorough cleaning.
This is necessary if deposits have formed on the heat exchanger surfaces after prolonged operation. During cleaning, the housing remains fixed.
The register can be easily pulled out after loosening a few screws.
Internal bypass solution
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If heat is not required at times, the hot air or flue gases can be routed past the register through the internal bypass.
The bypass dampers in the heat exchanger are moved by a maintenance-free actuator outside the casing.
These dampers are controlled by a thermostat or a controller with a temperature sensor at the heat storage tank and the heat exchanger.
External bypass solution
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For applications with extremely high temperatures we offer an alternative with an external bypass solution. The hot flue or exhaust gases are led past the register of the heat exchanger ”Thermojekt ® R“.
This completely prevents any vaporization of the carrier medium inside the registers due to residual heat transfer.
It also reduces the transfer of heat from the bypass to the register to a minimum.
These features ( extendable register and bypass solutions) can be inserted/added to the descriptions of the individual types (R,RB,G…).
Bomat - Making more of energy
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As the leading manufacturer of the original equipment for exhaust heat exchangers and a specialist for industrial waste heating solutions BOMAT is your first point of contact in the topic of condensing technology.
Flue and exhaust gas heat exchangers for heating exchangers - BOMAT PROFITHERM
Heating technology up to 160 kW combustion output
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Heat exchangers for flue gas heat recovery, for boilers with pressurejet gas or oil burners (other applications on request). For water-side integration into dual circuit system or boiler return.
FEATURES- Ceramic heat exchanger
- Height-adjustable feet
- Condensate drain
- Insulation
- White coated sheet steel casing
- Flue gas outlet with coupling
- AWR safety unit with 120 °C safety temperature limiter for flue pipe and 80 °C thermostat for heating water
- Cleaning apertures at flue gas connector and heat exchanger
Heating technology up to 350 kW combustion output
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Heat exchangers for flue gas heat recovery, for boilers with pressure-jet gas or oil burners (other applications on request).
FEATURES- Ceramic heat exchanger
- Flow switch
- Deaerator
- Flue gas outlet in polypropylene with coupling
- Condensate drain
- Insulation
- White coated sheet steel casing
- Water connections
- Flue gas inlet with connector
- BOMAT safety control panel incl. 120°C flue gas temperature limiter; AWR pump control with cable and plug
Heating technology up to 1000 kW combustion output
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Heat exchangers for flue gas heat recovery, for boilers with pressure-jet gas or oil burners (other applications on request).
FEATURES- Ceramic heat exchanger
- Flow switch
- Deaerator
- 3-flange* flue gas outlet in polypropylene
- Condensate drain
- Insulation
- White coated sheet steel casing
- Water connections
- 3-flange* flue gas inlet
- BOMAT safety control panel incl. 120 °C flue gas temperature limiter; AWR pump control with cable and plug
* choice of connection options
Heating technology up to 2200 kW combustion output
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Heat exchangers for flue gas heat recovery, for boilers with pressure-jet gas or oil burners (other applications on request).
FEATURES- Ceramic heat exchanger
- Flow switch
- Deaerator
- 3-flange* flue gas outlet in polypropylene
- Condensate drain incl. condensate hose
- Insulation
- White coated sheet steel casing
- Water connections
- 3-flange* flue gas inlet
- BOMAT safety control panel incl. 120°C flue gas temperature limiter for flue pipe; AWR pump control with cable and plug
* choice of connection options
Flue and exhaust gas heat exchangers for CHP industry series
BOMAT Profitherm Modular
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Flue gas heaters of the next generation in a modular design. BOMAT invests in efficiency and quality.
Highlights
- Suitable for operation with fuel oil, natural gas, biogas, sewer gas and landfill gas
- Up or down-sizing: exactly as you require
- Pipe sections individually selectable
- Easy to clean due to slide-in heater bank
- High heat recovery yield
- Low pressure drop on the flue gas side and fully corrosion-resistant
- Short payback periods
BOMAT ProfithermCHP industry series
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Profitherm exhaust gas heat exchangers for heat recovery from CHP units and industrial applications | CHP units.
FEATURES- Exhaust gas inlet chamber made from stainless steel with cleaning cover and flange
- Exhaust gas outlet chamber made from stainless steel with cleaning cover, condensate drain connector and flange
- Modular condensing heat exchanger design with ceramic pipes
- Flow switch on coolant side
- Injection cleaning for easy manual maintenance (included)
- Mineral wool insulation and powder-coated sheet steel casing
- Max. permissible exhaust gas sound pressure level 70 dB(A); provide suitable protection on site if sound pressure is higher
BOMAT Spiral tube flue gas heat exchanger
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The new spiral tube flue gas heat exchanger for CHP units up to 20 kWel: high heat recovery yield and very easy maintenance.
Highlights- High heat recovery yield
- Small and compact
- Low pressure drop
- Corrosion-resistant
- Very easy maintenance and cleaning: just unscrew front cover, remove spiral tube and clean. Job done.
BOMAT Minitherm
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Minitherm exhaust gas heat exchangers for heat recovery from CHP units.
FEATURES- Rotatable exhaust gas inlet header* with cleaning cover and flange adaptor for different exhaust pipe Ø
- Incl. protective cover
- Rotatable exhaust gas outlet bend with coupling and gasket to connect to exhaust pipe, incl. cleaning cover and condensate drain
- AWR safety unit, 230 V, with indicator lights, 80 °C temperature limiter for water temperature plus 120 °C high limit safety cut-out to protect exhaust pipe
- Cleaning brush for heat exchanger pipes
- Welded mounting plate for height-adjustable base frame or wall fixture (please order accessories separately)
Neutralising systems
BOMAT RNA cleaning and neutralising systems for heating and industrial applications
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The acidifying elements contained in fuel oil or natural gas (e.g. sulphur) cause aggressive acids (such as sulphuric acid) to be formed during combustion and subsequent condensation. BOMAT neutralising and cleaning systems treat (neutralise) this acidic condensate so that it is suitable to be fed into the public waste water system.
Note: In Germany, Code of Practice ATV-DVWK-A 251 regulates the discharge of condensate from combustion equipment. Acidic condensate from condensing systems can destroy waste water pipework.
Benefits of BOMAT RNA systems- Integral siphon
- Integral oil separator
- Replaceable absorber element for particle separation
- Large sedimentation volume for sludge settling
- Easy maintenance thanks to backflushing function and removable filter basket for neutralising granulate
- Compact construction and wide range of accessories
Sustainability
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BOMAT RNA cleaning and neutralising system.
The aim is to reduce the greenhouse effect radically. Many communes are fulfilling a key contribution by modernising municipal buildings and substituting private landlords with special programs. However the possibilities for already existing heating systems are very often not used efficiently:
- Very often low-temperature boilers are integrated which are clearly against the aims of the reduction of greenhouse gas.
- By using gas firing the so called “condensing boilers” are integrated. According to opinion-polls of experts up to 90% are not running throughthe operation of the condensing process and therefore do not reduce CO2 or contain high-quality metal which can not be replaced e.g. chrome, nickel, molybdenum and others. These condensing-technology units send metal ions into the waste water and are not only producing contaminants but also consuming resources of expensive metals which are of great importance for the future generations.
- For this reason many condensing-technology units have often been subsidised without reaching the requested function.
Centrifugal fans
Medium pressure centrifugal fans made from plastic
- Features
- Intake on one side
- Suitable for contaminated extract air and flue/exhaust gas
- Designed for continuous operation
- Manufactured in a vacuum moulding process (twin-sheet)
- Easy to dismantle, with intake cover incl. gasket as an inspection cover
- Pipe connection on the intake and pressure side with all-round soft PVC sleeve
References
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References and exemplary solutions of modern flue gas systems made of stainless steel in private, commercial and municipal buildings.
Airbus supplier Nordenham
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At the Premium AEROTEC plant directly on the Weser River, a special industrial pressurized furnace was installed for use in the production of aircraft fuselage parts made of carbon fiber composites.
Since very high flue gas temperatures and high pressures are generated during operation, a special flue gas system was a prerequisite. The planners found what they were looking for at Raab, which supplied the right product in the form of the ALKON stainless steel system.
Caterman Luxembourg
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The Caterman catering company in Luxembourg had Raab install the flue gas systems for its baking ovens.
A special structure made of steel girders is used for load transfer, and prefabricated wall ducts meet the requirements for fire protection.
1. FC Union Berlin
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In the stadium of the 1. FC Union Berlin “An der Alten Försterei” beats the heart of the real fans. Since summer 2013, the soccer arena with its numerous innovations can be fully used.
This also includes the heating system consisting of a CHP unit and gas condensing boilers, which was combined with a high-quality Raab flue gas system.
Firetube furnace smithy
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In Elterlein in the Ore Mountains, owner Axel Schmitz manufactures his unusual fireplaces in a historic industrial building.
When it comes to the flue gas system, he clearly relies on Raab quality.
Heraeus Quarzglas GmbH & Co. KG in Bitterfeld
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Expansion of the heating center at Heraeus Quarzglas GmbH & Co. KG in Bitterfeld. In addition, a Bosch Unimat UT-L boiler with 2.5 MW was installed in the heating center.
Here, the complete planning of the flue gas system was carried out in the Raab project department in Neuwied.
Augsburg calf hall
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A prime example of the conversion of industrial architecture from the turn of the century can be seen in Augsburg.
A special oven with combined gas and solid fuel operation was installed for food preparation. The associated flue gas technology comes from Raab and was expertly installed by a Raab partner.
Neuwied School for the Blind
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As part of a modernization project, the complete heating system and the heating network at the State School for the Blind and Visually Impaired in Neuwied-Feldkirchen were brought up to modern standards.
This also includes a three-flue gas system as well as Draught regulators and silencers.
MEWA Textile Wiesbaden
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The technical center was set up at the headquarters of MEWA Textil-Service AG in Wiesbaden.
Extensive tests for workwear take place there. One component of the new range is the customized five-pass flue gas system from specialist Raab in Neuwied, Germany.
Town Hall Bad Windsheim
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Contemporary chimney technology and historic baroque architecture are not mutually exclusive.
A prime example of the successful integration of a modern stainless steel flue gas system is the historic town hall of Bad Windsheim in Franconia, Germany.
