Linn High Therm GmbH

Heinrich-Hertz-Platz 1 , 92275 Eschenfelden
Germany

Telephone +49 9665 9140-0
Fax +49 9665 1720
info@linn.de

Trade fair hall

  • Hall 11 / H63
 Interactive Plan

Hall map

glasstec 2016 hall map (Hall 11): stand H63

Fairground map

glasstec 2016 fairground map: Hall 11

Our range of products

Product categories

  • 01  Glass production/Production Technology
  • 01.04  Glass melting technology
  • 01.04.08  Electrically heated systems
  • 01  Glass production/Production Technology
  • 01.09  Kiln technology
  • 01.09.03  Annealing lehrs, continuous/intermittent operation

Annealing lehrs, continuous/intermittent operation

  • 01  Glass production/Production Technology
  • 01.09  Kiln technology
  • 01.09.05  Pre-heating furnaces

Pre-heating furnaces

  • 01  Glass production/Production Technology
  • 01.09  Kiln technology
  • 01.09.06  Fusing Kilns

Fusing Kilns

  • 02  Glass processing and finishing
  • 02.04  Forming and bending technology

Forming and bending technology

  • 02  Glass processing and finishing
  • 02.09  Safety glass technology
  • 02.09.01  Pre-tempering technology
  • 02.09.01.01  Furnaces for thermal pre-tempering of glass

Furnaces for thermal pre-tempering of glass

  • 03  Glass products and applications
  • 03.10  Technical processing, treatment, finishing design.
  • 03.10.03  Glass finishing
  • 03.10.03.03  Glass painting/glass art
  • 03.10.03.03.05  Glass smelting/fusion technology

Glass smelting/fusion technology

Our products

Product category: Electrically heated systems

AHK-MODEL

CHAMBER FURNACE FOR HARDENING AND ANNEALING, BRICK AND ASW INSULATION, TMAX 1200 °C, 40 - 600 L
Applications:
annealing, hardening, heat treatment, powder carburization, pre-heating, shrink fitting, stress-relieving, temperingThe most important characteristics
Combined hardening and annealing furnace
Electrically heated small chamber furnace with electronic control
For hardening up to 1200°C and annealing with forced air circulation up to 800°C
Two swivelling doors and one ventilator
Insulation made of high quality lightweight refractory brick combined with modern fiber materials
High thermal power
High energy efficiency
Robust design
Flexible use
Quality -  made in Germany
Easy operation and handling
We make it possible
Linn High Therm is specialized in adapting its products to customer’s requirements. Please let us know if you need any modifications apart from our standard offer. We will do everything to satisfy your wishes.

Options
Useful chamber temperature 1300 °C (nur für die Betriebsart Härten)
Temperature controller G800
Temperature program controller
Serial interface for G800 controller
Screen recorder
Gas purging device with sheet cover around furnace brick lining
Lifting door

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Product category: Electrically heated systems

AK-MODEL

CHAMBER FURNACE FOR ANNEALING, BRICK AND ASW INSULATION, TMAX 800 °C, 22 - 603 L
Applications:
annealing, curing, drying, heat treatment, oxydation, pre-heating, shrink fitting, stress-relieving, temperingThe most important characteristics
Annealing furnace
Max. temperature up to 800 °C
Insulation with shaped brick made of high quality fiber boards and lightweight refractory bricks on the walls, furnace bottom lined with SiC boards
 Air circulation by ventilator in door for better temperature distribution and heat transfer
Short heating up and cooling down cycles
Quality - made in Germany
Easy operation and handling
We make it possible
Linn High Therm is specialized in adapting its products to customer’s requirements. Please let us know if you need any modifications apart from our standard offer. We will do everything to satisfy your wishes.

Options
Temperature controller G800
Serial interface
Temperature program controller
Screen recorder
Gas purging device with sheet cover around furnace brick lining

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Product category: Electrically heated systems

FBV/GBV-MODEL

CHAMBER FURNACE, BOTTOM LOADER, PCW-INSULATION, HIGH TEMPERATURE, GASTIGHT, TMAX 2400 °C, 2-1000 L
Applications:
annealing, bright annealing, graphitization/carbonisation, heat treatment, melting, reduction, remelting, sinteringThe most important characteristics
Resistance heated by MoSi2, molybdenum, tungsten or graphite heater
Chamber furnace in bottom loader design
gastight
Max. operating temperatures up to 2400 °C
4-sided heated
Insulation of a combination of high-quality PCW-materials, graphite felt or refractory bricks (bubble alumina)
Extremely short heating up and cooling down times
High energy efficiency
Wide range of options for customer-specific adaption
Quality made in Germany
Easy handling
 
We make it possible
Linn High Therm is specialized in adapting its products to customer’s requirements. Please let us know if you need any modifications apart from our standard offer. We will do everything to satisfy your wishes.

Standard options
Different temperature controllers
Gassing unit for save operation when using flammable and explosive gases, burning-off device with flame supervision for save operation when using flammable and explosive gases
Safety package for safe operation
Gas warning system for safe operation when using flammable and explosive gases
Insulation for hydrogen operation, energy saving when using gases with high heat conductivity
Viewing glass for visual process control or additional pyrometer measuring
Condensate trap for “dirty” processes such as debinding, pyrolysis
Process guiding software for full control and documentation via PC
Other options
Multi-zone-heating for best temperature accuracy
Trailing thermocouples
Gas recooling for fast cycles
Bursting disc as safety component
Temperature recorder
Quick lock furnace door bottom
Design according to ATEX guide lines                                                    
 
Technical data
Furnace housing
The protective gas and vacuum tight, from all sides reinforced inner housing is cooled by a fan to avoid outer wall temperatures of the housing of 180 °C, also during continuous operation.

The corresponding designed outer housing remains cool (max. 40 °C above room temperature).

The furnace bottom with a special sealing can be automatically moved up and down with a mechanism and is guided via a strand guide section.

The protective gas respectively vacuum tight bottom door is designed as explosion door (pressure limit appr. 10 – 20 mbar) and intended with turn-locks with adjustable spring pressure resistors.

On the rear side of the furnace there are connection flanges for inlet and outlet of protective gas, vacuum and the thermocouple.

Door flange, connections for thermocouple and heating elements as well as gas outlet are water cooled.

Insulation
The inner housing is lined with high-quality insulation materials (graphite or high temperature bricks as well as PCW plates). Lightweight, low energy consumption materials enable extremely short heating up and cooling down times (brick insulation excluded).

Heating
The furnace is heated on four sides by replaceable MoSi2, Mo, W or graphite heating elements, which are operated by a 3-phase thyristor unit with phase-angle and a transformer. The heating element connections are led out on the furnace rear wall.

Lateral, appr. In the middle of the furnace (seen from the rear wall), there is a PtRh-Pt double thermocouple type S (type B/C) (accuracy: class 2 according to DIN IEC part 2), which measures the temperature. A thermoelement pair leads to the temperature controller, the other one to the safety controller. A pyrometer measuring is (optionally) carried out laterally or from the cover.

Switch and control unit
1 pc. Lockable safety controller for additional protection of heating and insulation

1 pc. 3-phase thyristor unit for phase-angle and current limitation

1 pc. pre-transformer

1 pc. Working hours counter

3 pcs. power indicator

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Product category: Electrically heated systems

FDHK-MODEL (100 - 1500 MM)

ROTARY TUBE FURNACE/KILN, ROTARY DRUM FURNACE/KILN, GASTIGHT, Ø20 – 1500 MM, HEATED LENGTH 100 – 1500 MM, TMAX 1900 °C.
Applications:
ashing, calcination, oxydation, pyrolysis, reduction, thermal recyclingThe most important characteristics
Thermal treatment of bulk materials (powder, granules, fiber, waste)
Resistance heated with FeCrAl-, APM-, MoSi2-heating elements
Microwave-heated
Hybrid heating (microwave/ resistance heating, resistance/ hot air)
Max. operating temperatures up to 1900 °C
Insulation of qualitatively superior ceramic fiber
High energy efficiency
Adjustable inclination and speed
Large span of options for customer-specific adaptions
Quality made in Germany
Easy operation and handling
Continous or/ and batch operation 
We make it possible
Linn High Therm is specialized in adapting its products to customer’s requirements. Please let us know if you need any modifications apart from our standard offer. We will do everything to satisfy your wishes. 

Standard options
Different temperature controllers
Gassing for safe operation when using flammable and explosive gases
Burning-off device with flame supervision for safe operation when using flammable and explosive gases
Safety package for safe operation
Gas warning system for safe operation when using flammable and explosive gases
Viewing glass for visual process control or additional pyrometer measuring
Condensate trap
Process guiding software for full control and documentation via PC  
Further options
Up to 10 or more heating zones for best temperature distribution
Trailing thermocouple(s)
Foldable for easy tube change
End caps of stainless steel or alumina or quartz glass for high-purity processes
Conveyor system (screw conveyor, vibration or belt conveyor, cellular wheel sluice, double sluice)
Feed tank
Collecting vessel
Inlet and outlet head
Gas feeding device for one or more process gases
Automatization or integration in manufacturing process chain
Dust collector (cyclone, dust filter)
Gas/ air pre-heater
Thermal afterburning
Fittings in rotary tube for improvement of flowing qualities
Emergency drive
UPS
Current measuring
Cooling water-heat exchanger
Different drum and rotary tube designs are possible
PRODUCT SPECIFICATIONS
Technical data
Furnace housing
The furnace housing is mounted on a tilting frame and fixed on an underframe. The furnace inclination can be adjusted with a manual/ mechanical/ hydraulic lifting device.

The rotary tube drive is done via a frequency-controlled three-phase motor. The lead time can be varied steplessly via speed and work angle of the rotary tube.

Insulation
The insulation mainly consists of energy saving ceramic fiber material and is designed, depending on application, for cyclic or continuous operation.

Insert tube
Depending on temperature and firing good, different materials for the rotary tube can be used:

Metallic tubes up to 1250 °C
Ceramic tubes up to 1800 °C
Quartz glass tubes up to 1050 °C
Graphite/ sapphire tubes up to 1900 °C
Special materials for special applications (acid-resistant stainless steels, Mo, W)
In the insert tube different fittings for improvement of mixing, for prevention of caking, for avoidance of lump formation etc. can be realized.

Rotary tubes can be also realized as cooling tracks with indirect water cooling.      

Gastight design
The gas flows in the rotary tube can be realized in direct current as well as in countercurrent.

Switch and control unit
Safety controller for each heating zone for protection of heating and insulation
3-phase thyristor unit for power regulation
Pre-transformer (if necessary)
Operating hours counter

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Product category: Electrically heated systems

FDHK-MODEL (1500 - 5000 MM)

ROTARY TUBE FURNACE/KILN, ROTARY DRUM FURNACE/KILN, GASTIGHT, Ø100 – 1800 MM, HEATED LENGTH 1500 – 5000 MM, TMAX 1800 °C.
Applications:
ashing, calcination, drying, heat treatment, oxydation, pyrolysis, reduction, thermal recyclingThe most important characteristics
Thermal treatment of bulk materials (powder, granules, fiber, waste)
Resistance heated with FeCrAl-, APM-, MoSi2-heating elements
Induction-heated
Microwave-heated
Hybrid heating (microwave/ resistance heating, resistance/ hot air)
Max. operating temperatures up to 1800 °C
Insulation of qualitatively superior ceramic fiber
High energy efficiency
Adjustable inclination and speed
Large span of options for customer-specific adaptions
Quality made in Germany
Easy operation and handling
Continous or/ and batch operation 
We make it possible
Linn High Therm is specialized in adapting its products to customer’s requirements. Please let us know if you need any modifications apart from our standard offer. We will do everything to satisfy your wishes. 

Standard options
Different temperature controllers
Gassing for safe operation when using flammable and explosive gases
Burning-off device with flame supervision for safe operation when using flammable and explosive gases
Safety package for safe operation
Gas warning system for safe operation when using flammable and explosive gases
Viewing glass for visual process control or additional pyrometer measuring
Condensate trap
Process guiding software for full control and documentation via PC  
Further options
Up to 10 or more heating zones for best temperature distribution
Trailing thermocouple(s)
Foldable for easy tube change
End caps of stainless steel or alumina or quartz glass for high-purity processes
Conveyor system (screw conveyor, vibration or belt conveyor, cellular wheel sluice, double sluice)
Feed tank
Collecting vessel
Inlet and outlet head
Gas feeding device for one or more process gases
Automatization or integration in manufacturing process chain
Dust collector (cyclone, dust filter)
Gas/ air pre-heater
Thermal afterburning
Fittings in rotary tube for improvement of flowing qualities
Emergency drive
UPS
Current measuring
Cooling water-heat exchanger
Different drum and rotary tube designs are possible 
PRODUCT SPECIFICATIONS
Technical data
Furnace housing
The furnace housing is mounted on a tilting frame and fixed on an underframe. The furnace inclination can be adjusted with a manual/ mechanical/ hydraulic lifting device.

The rotary tube drive is done via a frequency-controlled three-phase motor. The lead time can be varied steplessly via speed and work angle of the rotary tube.

Insulation
The insulation mainly consists of energy saving ceramic fiber material and is designed, depending on application, for cyclic or continuous operation.

Insert tube
Depending on temperature and firing good, different materials for the rotary tube can be used: 

Metallic tubes up to 1250 °C
Ceramic tubes up to 1800 °C
Quartz glass tubes up to 1050 °C
Special materials for special applications (acid-resistant stainless steels, Mo, W)
In the insert tube different fittings for improvement of mixing, for prevention of caking, for avoidance of lump formation etc. can be realized. 

Rotary tubes can also be realized as cooling tracks with indirect water cooling.

Gastight design
The gas flows in the rotary tube can be realized in direct current as well as in countercurrent.

Switch and control unit 
Safety controller for each heating zone for protection of heating and insulation
3-phase thyristor unit for power regulation
Pre-transformer (if necessary)
Operating hours counter
PLC (e. g. Stange, Simatic, optional possible among others)

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Product category: Electrically heated systems

FDHK-MODEL (5000 - 12000 MM)

ROTARY TUBE FURNACE/KILN, ROTARY DRUM FURNACE/KILN, GASTIGHT, Ø250 – 1800 MM, HEATED LENGTH 5000 – 12000 MM, TMAX 1150 °C.
Applications:
ashing, calcination, drying, oxydation, pyrolysis, reduction, thermal recyclingThe most important characteristics
Thermal treatment of bulk materials (powder, granules, fiber, waste)
Resistance heated with FeCrAl heating elements
Hybrid heating (resistance/ hot air)
Max. operating temperatures up to 1150 °C
Insulation of qualitatively superior ceramic fiber
High energy efficiency
Adjustable inclination and speed
Large span of options for customer-specific adaptions
Quality made in Germany
Easy operation and handling
Continous or/ and batch operation 
We make it possible
Linn High Therm is specialized in adapting its products to customer’s requirements. Please let us know if you need any modifications apart from our standard offer. We will do everything to satisfy your wishes. 

Standard options
Different temperature controllers
Gassing for safe operation when using flammable and explosive gases
Burning-off device with flame supervision for safe operation when using flammable and explosive gases
Safety package for safe operation
Gas warning system for safe operation when using flammable and explosive gases
Viewing glass for visual process control or additional pyrometer measuring
Condensate trap
Process guiding software for full control and documentation via PC  
Further options
Up to 10 or more heating zones for best temperature distribution
Trailing thermocouple(s)
End caps of stainless steel
Conveyor system (screw conveyor, vibration or belt conveyor, cellular wheel sluice, double sluice)
Feed tank
Collecting vessel
Inlet and outlet head
Gas feeding device for one or more process gases
Automatization or integration in manufacturing process chain
Dust collector (cyclone, dust filter)
Gas/ air pre-heater
Thermal afterburning
Fittings in rotary tube for improvement of flowing qualities
Emergency drive
UPS
Current measuring
Cooling water-heat exchanger
Different drum and rotary tube designs are possible
PRODUCT SPECIFICATIONS
Technical data
Furnace housing
The furnace housing is mounted on a tilting frame and fixed on an underframe. The furnace inclination can be adjusted with a manual/ mechanical/ hydraulic lifting device.

The rotary tube drive is done via a frequency-controlled three-phase motor. The lead time can be varied steplessly via speed and work angle of the rotary tube.

Insulation
The insulation mainly consists of energy saving ceramic fiber material and is designed, depending on application, for cyclic or continuous operation.

Insert tube
Depending on temperature and firing good, different materials for the rotary tube can be used: 

Metallic tubes up to 1150 °C
Special materials for special applications (acid-resistant stainless steels) 
In the insert tube different fittings for improvement of mixing, for prevention of caking, for avoidance of lump formation etc. can be realized. 

Rotary tubes can also be realized as cooling tracks with indirect water cooling.

Gastight design
The gas flows in the rotary tube can be realized in direct current as well as in countercurrent.

Switch and control unit 
Safety controller for each heating zone for protection of heating and insulation
3-phase thyristor unit for power regulation
Pre-transformer (if necessary)
Operating hours counter
PLC (e. g. Stange, Simatic, optional possible among others)

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Product category: Annealing lehrs, continuous/intermittent operation

FKH/GKH/RUBISTAR-MODELS

CHAMBER FURNACE, HIGH PRESSURE, WATER COOLED PRESSURE VESSEL, PCW INSULATION, GAS AND VACUUM TIGHT, TMAX UP TO 2200°C, PMAX UP TO 200 BAR
Applications:
calcination, gemstone heat treatment, graphitization/carbonisation, heat treatment, melting, oxydation, sinteringThe most important characteristics:
Horizontal TÜV certified and approved pressure vessel with external water cooling
Product loading through special door in furnace front side
Max. temperature up to 2200 °C
Max. pressure up to 200 bar
Integrated power reserve for attainment of temperature and control accuracy
SE 502 controller
High quality stainless steel construction
Quality made in Germany
Easy operation and handling
Safe design (emergency pressure release, gas purging)
We make it possible:
Linn High Therm is specialized in adapting its products to customer’s requirements. Please let us know if you need any modifications. We will do everything to satisfy your wishes.

Options
Different controller systems
Emergency water cooling
Cooling water recirculation cooler
Process guiding software for full control and documentation via PC
Vacuum unit
Gas warning system for safe operation when using flammable and explosive gases
Burning-off device with flame supervision for safe operation when using flammable and explosive gases
UPS
Cooling water heat exchanger

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Product category: Annealing lehrs, continuous/intermittent operation

HK-MODEL

CHAMBER FURNACE FOR HARDENING, BRICK AND ASW INSULATION, TMAX 1300 °C, 31 - 600 L
Applications:
borating, forging, hardening, heat treatment, powder carburization, pre-heating, shrink fitting, temperingThe most important characteristics
Hardening furnace
Small electrically heated chamber furnace with electronic control
For hardening up to 1300°C
Insulation made of shaped stones surrounded by high quality fiber boards
Robust design
Extremely short heating up and cooling down cycles
High energy efficiency
Weight reducing design
Quality made in Germany
Easy operation and handling 
We make it possible
Linn High Therm is specialized in adapting its products to customer’s requirements. Please let us know if you need any modifications apart from our standard offer. We will do everything to satisfy your wishes. 

Options
Temperature controller G800
Serial interface
Screen recorder
Useful chamber temperature 1300 °C
Gas purging device with sheet cover around furnace brick lining
Lifting door to top

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Product category: Pre-heating furnaces

FRH/FRV-MODEL

TUBE FURNACE, HIGH TEMPERATURE, GAS AND/OR VACUUM TIGHT, Ø 25 - 150 MM, HEATED LENGTH 150 - 1000 MM, TMAX 1800 °C
Applications:
activation, ashing, brazing, bright annealing, calcination, calibration, carburization, crystal growing, curing, CVD chemical vapour deposition, debinding, directional solidification, firing, fusion, gemstone heat treatment, heat treatment, melting, pulling, reduction, shrink fitting, sintering, soldering, stress-relieving, surface coating, temperingThe most important characteristics
Tube furnace type FRH / FRV
Max. temperature up to 1800 °C
Insulation made of energy saving fiber material
Integrated power reserve for attainment of temperature and control accuracy
3-zone connection of heating elements for better temperature control
Extremely short heating up and cooling down cycles
High quality stainless steel construction
Quality made in Germany
Easy operation and handling
We make it possible
Linn High Therm is specialized in adapting its products to customer’s requirements. Please let us know if you need any modifications apart from our standard offer. We will do everything to satisfy your wishes.

Options
Temperature program controller
Serial interface
Three-zone control
Process guiding software
Cable
Insert tubes
Protective gas tight end caps
Gas feeding device
Safety devices
Vacuum operation

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Product category: Fusing Kilns

HT-MODEL

CHAMBER FURNACE, HIGH TEMPERATURE, GAS TIGHT, TMAX 2100 °C, 3-52.5 L
Applications:
brazing, calcination, calibration, crystal growing, firing, gemstone heat treatment, melting, oxydation, reduction,sinteringThe most important characteristics:
Resistance heated by MoSi2, molybdenum, tungsten or graphite heater
Chamber furnace
Gas tight
Maximum operating temperature up to 2100 °C
Insulation by a combination of high quality ceramic fiber, graphite felt or porous alumina brickwork
Extremely short heating up and cooling down cycles
High energy efficiency
Wide range of options for customizing
High quality – made in Germany
Easy handling 
We make it possible:
Linn High Therm is specialized in adapting its products to customer’s requirements. Please let us know if you need any modifications apart from our standard offer. We will do everything to satisfy your wishes.

Standard options
Different temperature controllers
Gas feeding device for save operation when using burnable and explosive gases according to ATEX rules                                               
Burning-off device with flame supervision for save operation when using burnable and explosive gases according to ATEX rules         
Safety package for save operation when using burnable and explosive gases according to ATEX rules                                                   
Gas warning system for save operation when using burnable and explosive gases according to ATEX rules                                                
Insulation for hydrogen operation H2, energy saving if gases with high thermal conductivity are used
Inspection glass for visual process control or additional pyrometer measurement
Door guidance for save and easy operation (insulation protection door)
Condensate trap to allow “dirty” processes like debinding
Process guiding software for complete control and documentation via PC  
Other options
3-zone heating for best temperature uniformity
Travelling thermocouple
Gas recooling unit for fast cycling
Inner insulation made of alumina bricks with high chemical and thermal stability
Glove box installation

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About us

Company details

Linn High Therm with over 120 employees is based in Eschenfelden, Germany. It is specialized in the production of industrial and lab furnaces/ kilns, microwave furnaces, sample preparation units for spectroscopy, induction heating systems, precision fine casting systems and customer-specific systems. There are only a few companies of such qualification and production spectrum: R&D, design, production, and quality control all under one roof with outstanding experience since 1969. From prototype to pilot-scale in almost no time. Linn is serving the following industries worldwide: Metal, ceramics, chemicals, glass, building materials, research and development, medical, nuclear, recycling, education and food. You can find Linn products everywhere heat treatment takes place - also in your production.

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Company data

Target groups
  • Manufacturing, Processing and Finishing
  • Solar Glass/Technical Glass