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Compact Tube Furnaces
PRODUCT IMAGE  
RD 30/200/11  
PRODUCT IMAGE

Over-temperature limiter

RD 30/200/11 - RD 30/200/13

The RD product line furnaces convince with their unbeatable price-performance ratio, very compact outer dimensions and their low weight. These all-rounders are equipped with a working tube which also serves as support for the heating wires. Thus, the working tube is part of the furnace heating which has the advantage that the furnaces achieve very high heat-up rates. The furnaces can be supplied for 1100 °C or 1300 °C. Both models are designed for horizontal application. If the customer requires protective gas atmosphere, a separate working tube incl. gas supply system 1, e.g. made of quartz glass, must be inserted in the working tube.

  • Tmax 1100 °C or 1300 °C
  • Housing made of sheets of textured stainless steel
  • Inner diameter of the tube: 30 mm, heated length: 200 mm
  • Working tube made of C 530 material including two fiber plugs as standard
  • Thermocouple type K (1100 °C) or type S (1300 °C)
  • Solid state relays provide for low-noise operation of the heating
  • Heating wires wound directly around the working tube resulting in very fast heat-up rates

Additional equipment

  • Over-temperature limiter with adjustable shut-off temperature for thermal protection class 2 according to EN 60519-2 as over-temperature protection for furnace and load
  • Gas supply system for non-flammable protective or reactive gas
ModelTmaxOuter dimensions in mmInner tube ØHeated Length constantConnectedMinutesElectricalWeight
 °C ¹BTHmmlength/mmtemperature ∆T 10 K in mmload kWto Tmax²connection*in kg
RD 30/200/11110035020035030200651.5201-phase12
RD 30/200/13130035020035030200651.5251-phase12
¹Tmax. is reached outside the tube. Realistic working temperature inside the tube is approx. 50 °C lower. *Please see page 60 for more information about supply voltage
²If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE

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PRODUCT IMAGE PRODUCT IMAGE  
R 50/250/12 R 100/750/13  
PRODUCT IMAGE

R 50/250/13 with gas supply system 2

R 50/250/12 - R 120/1000/13

These compact tabletop tube furnaces with integrated control systems can be used universally for many processes. Equipped with a standard working tube of C 530 ceramic and two fiber plugs, these furnaces have an unbeatable price/performance ratio.

  • Tmax 1200 °C or 1300 °C
  • Housing made of sheets of textured stainless steel
  • Outer tube diameter of 50 to 120 mm, heated length from 250 to 1000 mm
  • Working tube of C 530 ceramic including two fiber plugs as standard equipment
  • Type S thermocouple
  • Solid state relays provide for low­noise operation

Additional equipment

  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
  • Charge control with temperature measurement in the working tube and in the furnace chamber outside the tube
  • Three-zoned design with HiProSystem control (heated length from 750 mm, for 1300 °C models)
  • Alternative gas supply systems for protective gas or vacuum operation
  • Process control and documentation with Controltherm MV software package
ModelTmaxOuter dimensions in mmOuter tube ØHeated Length constantTube lengthConnectedElectricalWeight
 °C³WDH/mmlength mmtemperature ∆T 10 K in mmin mmload kWconnection*in kg
R 50/250/12120040024049050250804501.21-phase20
R 50/500/121200650240490505001707001.81-phase25
R 100/750/12120010003606409075025010703.61-phase80
R 120/1000/1212001300420730120100033014006.03-phase²170
            
R 50/250/13130040024049050250804501.31-phase35
R 50/500/131300650240490505001707002.41-phase48
R 100/750/13¹130010003606409075025010704.43-phase²120
R 120/1000/13¹13001300420730120100033014006.53-phase²230
¹These models also available with three-zones *Please see page 60 for more information about supply voltage
²Heating only between two phases ³Tmax. is reached outside the tube. Realistic working temperature inside the tube is approx. 50 °C lower.

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Universal Tube Furnaces with Stand for Horizontal or Vertical Operation
PRODUCT IMAGE PRODUCT IMAGE
RT 50-250/13 RT 50-250/11 with gas supply system for nitrogen
RT 50-250/11 - RT 30-200/15

These compact tube furnaces are used when laboratory experiments must be performed horizontally, vertically, or at specific angles. The ability to configure the angle of tilt and the working height, and their compact design, also make these furnaces suitable for integration into existing process systems.

  • Tmax 1100 °C, 1300 °C, or 1500 °C
  • Compact design
  • Vertical or horizontal operation freely adjustable
  • Working height freely adjustable
  • Working tube made of C 530 ceramic
  • Type S thermocouple
  • Operation also possible separate from stand if safety guidelines are observed
  • Control system integrated in furnace base
ModelTmaxOuter dimensions in mmInner tube ØHeated Length constantTube lengthConnectedElectricalWeight
 °CWDH/mmlength mmtemperature ∆T 10 K in mmin mmload kWconnection*in kg
RT 50-250/11110035038074050250803601.81-phase25
RT 50-250/13130035038074050250803601.81-phase25
RT 30-200/15150044547574030200703601.81-phase45
*Please see page 60 for more information about supply voltage

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Universal High-Temperature Tube Furnaces with Silicon Carbide Rod Heating Gas Atmosphere or Vacuum
PRODUCT IMAGE PRODUCT IMAGE
RHTC 80-230/15 RHTC 80-450/15 with manual gas supply system
PRODUCT IMAGE

SiC rod heating

RHTC 80-230/15 - RHTC 80-710/15

These compact tube furnaces with SiC rod heating and integrated switchgear and controller can be used universally for many processes. With an easy to replace working tube as well as additional standard equipment options, these furnaces are flexible and can be used for a wide range of applications. The high-quality fiber insulation ensures fast heating and cooling times. The SiC heating rods installed parallel to the working tube ensure excellent temperature uniformity. The price-performance ratio for this temperature range is unbeatable.

  • Tmax 1500 °C
  • Housing made of sheets of textured stainless steel
  • High-quality fiber insulation
  • Active cooling of housing for low surface temperatures
  • Type S thermocouple
  • Solid state relays provide for low-noise operation
  • Prepared for assembly of working tubes with water-cooled flanges
  • Ceramic tube, C 799 quality

Additional equipment

  • Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect furnace and load
  • Charge control with temperature measurement in the working tube and in the furnace chamber outside the tube
  • Fiber plugs
  • Check valve at gas outlet avoids intrusion of false air
  • Working tubes for operation with water-cooled flanges
  • Display of inner tube temperature with additional thermocouple
  • Alternative gas supply systems for protective gas or vacuum operation
ModelTmaxOuter dimensions in mmOuter tube ØHeated Length constantTube lengthConnectedElectricalWeight
 °C³WDH/mmlength/mmtemperature ∆T 10 K in mmin mmload kWconnection*in kg
RHTC 80-230/15150060043058080230806007.53-phase²50
RHTC 80-450/1515008204305808045015083011.33-phase¹70
RHTC 80-710/151500107043058080710235108013.83-phase¹90
¹Heating only between two phases *Please see page 60 for more information about supply voltage
²Heating only between phase 1 and neutral ³Tmax. is reached outside the tube. Realistic working temperature inside the tube is approx. 50 °C lower.

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High-Temperature Tube Furnaces for Horizontal and Vertical Operation up to 1800 °C Gas Atmosphere or Vacuum
PRODUCT IMAGE PRODUCT IMAGE
RHTH 120/600/17 RHTV 120/480/16 LBS with working tube closed at one side, protective gas and vacuum option as well as with electric screw drive of the lift table
PRODUCT IMAGE

RHTH 120/600/16 with upstream furnace RT 50-250/11 to preheat the process gas

PRODUCT IMAGE

RHTV 120/150/17 vertical tube furnace with stand and gas supply system 2 as additional equipment

RHTH 120/150/.. - RHTH 120/600/.., RHTV 120/150/.. - RHTV 120/600/..

The high-temperature tube furnaces are available in either horizontal (type RHTH) or vertical (type RHTV) designs. High-quality insulation materials made of vacuum-formed fiber plates enable energy-saving operation and a fast heating time due to low heat storage and heat conductivity. By using different gas supply systems, operations can be performed under non-flammable or flammable protective or reactive gases or under vacuum.

  • Tmax 1600 °C, 1700 °C, or 1800 °C
  • MoSi2 heating elements, mounted vertically for easy replacement
  • Insulation with vacuum-formed ceramic fiber plates
  • Rectangular outer housing with slots for convection cooling
  • Models RHTV with hinges for wall mounting
  • Housing made of sheets of textured stainless steel
  • Ceramic working tube made of material C 799 incl. fiber plugs operation under air
  • Type B thermocouple
  • Power unit with low-voltage transformer and thyristor
  • Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the oven and load and with selectable maximum temperature gradient as tube protection
  • Switchgear and control unit separate from furnace in separate floor standing cabinet

Additional equipment

  • Charge control with temperature measurement in the working tube and in the furnace chamber outside the tube
  • Display of inner tube temperature with additional thermocouple
  • Gas tight flanges for protective gas and vacuum operation
  • Manual or automatic gas supply system
  • Three-zone control for optimization of temperature uniformity (only RHTH)
  • Check valve at gas outlet avoids intrusion of false air
  • Stand for vertical operation
ModelTmaxOuter dimensions in mmMax. outer tube ØHeated Length constant temperature ∆T 10 KTube lengthConnectedElectricalWeight
Horizontal design°C³DH/mmlength mmin mmin mmload kWconnection*in kg
RHTH 120/150/..1600 or47055064050150503805.43-phase¹70
RHTH 120/300/..1700 or620550640803001005309.03-phase¹90
RHTH 120/600/..180092055064012060020083014.43-phase¹110
ModelTmaxOuter dimensions in mmMax. outer tube ØHeated Length constant temperature ∆T 10 KTube lengthConnectedElectricalWeight
Vertical design°C³WD/mmlength mmin mmin mmload kWconnection*in kg
RHTV 120/150/..1600 or57065051050150303805.43-phase¹70
RHTV 120/300/..1700 or570650660803008053010.33-phase¹90
RHTV 120/600/..180057065096012060017083019.03-phase¹110
¹Heating only between two phases *Please see page 60 for more information about supply voltage
²Without tube ³Tmax. is reached outside the tube. Realistic working temperature inside the tube is approx. 50 °C lower.

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Hinged Tube Furnaces for Horizontal or Vertical Operation up to 1300 °C Gas Atmosphere or Vacuum
 PRODUCT IMAGE PRODUCT IMAGE
 RS 80/750/13 with stand as additional equipment for vertical operation RS 120/1000/13S with gas tight tube, charge control and check valve at gas outlet
PRODUCT IMAGE

RS 120/750/13 with gas supply system 4, hydrogen applications

PRODUCT IMAGE

Quartz glass and flanges for protective gas operation as optional equipment

PRODUCT IMAGE

Optical temperature measurement for the use as contiuously working furnace

RS 80/300/11 - RS 170/1000/13

The tube furnaces of the product line RS can be used for horizontal as well as for vertical operation. The hinged design makes it easy to change the working tube. It allows the different working tubes (e.g. working tubes made of different materials) to be comfortably taken out and put in.

Using the wide range of accessories these profi tube furnaces can be optimally configured for your process. By upgrading the furnaces with different gas supply systems the operation in a protective gas atmosphere, under vacuum or under flammable protective or reactive gases is possible. Besides convenient standard controllers for process control modern PLC control systems are also available.

  • Tmax 1100 °C or 1300 °C
  • Housing made of sheets of textured stainless steel
  • Tmax 1100 °C: Type K thermocouple
  • Tmax 1300 °C: Type S thermocouple
  • Frame for vertical operation, which can also be retrofitted as additional equipment
  • Hinged design for simple insertion of the working tube
  • Working tube made of ceramic C 530 for operation in air included in scope of delivery
  • Switchgear and control unit separate from furnace in own wall or standing cabinet

Additional equipment

  • Charge control with temperature measurement in the working tube and in the furnace chamber outside the tube
  • Display of inner tube temperature with additional thermocouple
  • Different gas supply systems (page 44) for non-flammable or flammable protective or reactive gases and vacuum operation
  • Three-zone control for optimization of temperature uniformity
  • Check valve at gas outlet avoids intrusion of false air
  • Ceramic half pipe for heating elements and/or as support surface for the load
  • Optical temperature measurement for the use as contiuously working furnace
  • Stand for vertical operation
  • Base frame with integrated switchgear and controller
ModelTmaxOuter dimensions³ in mmMax. outer tube ØHeated Length constant temperature ∆T 10 KTube lengthConnectedElectricalWeight
 °C1DH/mmlength mmin mmin mmload kWconnection*in kg
RS 80/300/11110055547539080300100650 1.81-phase80
RS 80/500/11110075547539080500170850 3.41-phase90
RS 80/750/1111001005475390807502501100 4.63-phase4105
RS 120/500/111100755525440120500170850 4.83-phase495
RS 120/750/11110010055254401207502501100 6.33-phase¹110
RS 120/1000/111100125552544012010003301350 9.03-phase¹125
RS 170/750/11110010055754901707502501100 7.0 �3-phase¹115
RS 170/1000/111100125557549017010003301350 9.0 �3-phase¹130
            
RS 80/300/13130055547539080300100650 3.61-phase80
RS 80/500/13130075547539080500170850 6.03-phase¹90
RS 80/750/1313001005475390807502501100 9.33-phase¹105
RS 120/500/131300755525440120500170850 7.83-phase¹95
RS 120/750/13130010055254401207502501100 12.63-phase¹110
RS 120/1000/131300125552544012010003301350 12.63-phase¹125
RS 170/750/13130010055754901707502501100 12.63-phase¹115
RS 170/1000/131300125557549017010003301350 12.63-phase¹130
¹Heating only between two phases 4Heating only between phase 1 and neutral
²Without tube 1Tmax. is reached outside the tube. Realistic working temperature inside the tube is approx. 50 °C lower.
³Outer dimensions for vertical operation upon request 7Only valid for single-zone version
*Please see page 60 for more information about supply voltage

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Rotary Tube Furnaces for Continuous Processes and/or Batch Operation
 PRODUCT IMAGE PRODUCT IMAGE
 RSR 120/1000/13 for continuous operation RSR-B 120/750/11 as tabletop version for batch operation
PRODUCT IMAGE

Adapters for alternative operation with working tube or process reactor

PRODUCT IMAGE

Connection set for vacuum operation

RSR 80-500/11 - RSR 120-1000/13, RSR-B 80-500/11 - RSR-B 120-1000/11

If, for example, the focus lies on maintaining the individual grain characteristics of the material such as in drying or calcination, rotary tube furnaces of the RSR product line are the optimal solution. The permanently rotating working tube allows for the continuous movement of the charge.

In general, these models can be used for continuous processing and/or batch operation. While during a continuous process the charge is transported uniformly from one end to the other of the working tube, during batch operation, it can be heated-treated over a longer period in the furnace chamber thanks to the special shape of the quartz glass reactor (tapered tube ends).

The compact furnaces of the RSR-B product line are perfectly suited for batch operation. The versatile RSR furnaces can be equipped both with working tubes for continuous operation as well as with reactors for batch operation.

Depending on the process, charge and the required maximum temperature, various working tubes made of quartz glass, ceramic or metal can be used (see page 42). Depending on the application these models can be upgraded by adding suitable accessories such as filling funnels, electric feed screw for feeding material or gas supply systems for small production furnaces. Operation can take place in air, in non-flammable protective or reactive gases, or in a vacuum. The necessary equipment is available as additional equipment.

Standard design of all models

  • Housing made of sheets of textured stainless steel
  • Beltless drive and hinged furnace housing provide for very easy removal of working tube or reactor
  • Adjustable drive of approx. 2-45 rpm

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 PRODUCT IMAGE
 RSR 80/750/11 with charging funnel and collection bottle at the outlet
PRODUCT IMAGE

Screw-conveyor with adjustable speed

PRODUCT IMAGE

Vibration generator at the charging funnel for improved powder supply

Additional equipment for all models

  • Different tube diameters or heated lengths
  • Manual or automatic gas supply systems
  • Gas tight rotary device for the connection to gas supply systems
  • Check valve at gas outlet avoids intrusion of false air
  • Three-zone control for the optimization of temperature uniformity
  • Temperature display unit in the working tube with measurement by means of an additional thermocouple
  • Charge control by means of an additional thermocouple in the working tube

Standard design for batch operation

  • Tmax 1100 °C
  • Thermocouple type K
  • Furnace designed as table-top model with quartz glass reactor which opens on both sides, tapered ends
  • Reactor is removed from the furnace for discharging
  • Switchgear and control unit separate from furnace in own wall or standing cabinet

Additional equipment for batch operation

  • Different gas supply systems
  • Vacuum design, up to 10-² mbar depending on the applied pump
  • Reactor made of quartz glass, open at both sides, with burling for better conveyance of the charge in the tube
  • Package for improved charging and discharging of the working tube in the following design:
    • Single-side closed mixing reactor made of quartz glass with an integrated blade for improved blending of the charge
    • Tilting mechanism to the left/to the right. For charging and heat treatment, the furnace is tilted towards the right side until the stop so that the load is charged into the furnace. For discharge, the furnace is tilted towards the other side to discharge the powder from the reactor. It is no longer necessary to remove the reactor.
    • Furnace assembled on base with integrated switchgear and controller, incl. transport casters
  • Digital display for the tilting angle of the furnace

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 PRODUCT IMAGE
 RSR 120/750/11 S with electrically adjustable tilting angle for continuous processes or batch operation
PRODUCT IMAGE

RSR 120/500/11 S with reactor closed at one side for batch operation

PRODUCT IMAGE

Gas tight closing plug for tubes made of silica glass closed at one side

Standard design for continuous processes

  • Tmax 1100 °C
    • Thermocouple type K
    • Working tube made of quartz glass open at both sides
  • Tmax 1300 °C
    • Thermocouple type S
    • Working tube made of C530 ceramics, open at both sides, not gas tight
  • Compact design with switchgear and controller, mounted in the base, including transport casters
  • Furnace mounted on base, including manual spindle drive with crank for pre-adjustment of the tilting angle

Additional equipment for continuous processes

  • Working tube made of quartz glass with burling for optimized mixing of the charge up to Tmax 1100 °C
  • Gas tight working tube made of C610 ceramics up to Tmax 1300 °C
  • Higher temperatures up to 1600  °C available on request
  • Different gas supply systems with good process gas circulation around the charge thanks to an inlet on one tube side and outlet on the other side (only together with the charging system, see below)
  • Charging system for continuous material transport, consisting of:
    • Charging funnel made of stainless steel with lockable powder outlet
    • Electric vibration generator at the charging funnel for the optimization of material supply into the working tube as additional option
    • Electrically driven screw-conveyor at the inlet of the working tube with 10, 20 or 40 mm pitch and adjustable speed between 0.28 and 6 revolutions per minute, different gear transmissions for other speeds on request
    • Collecting bottle made of laboratory glass at the outlet of the working tube
    • Suitable for operation in a gas atmosphere or in a vacuum
  • Digital display unit for the tilting angle of the furnace
  • Electric linear drive for the adjustment of the tilting angle
  • Alternating design for continuous processes or batch operation. The furnace can be tilted on the frame towards both sides. The customer can mount a working tube open at both sides for flow processes as well as a process reactor (Tmax 1100 °C) closed at one side for batch operation.
  • PLC controls for temperature control and the control of connected aggregates such as gearshift and speed of the screw-conveyor, speed of the working tube, switching of the vibration generator, etc.
ModelTmaxOuter dimensions in mmLength constant Tube dimensions in mmConnectedElectricalWeight
Rotary tube furnace    TemperatureTotal lengthLength workingØ OuterØ Terminal end5loadconnection* 
 °C³WDH∆T 10 K in mm zone5  kW in kg
Batch operation            
RSR-B 80-500/11110011454475390170114050076343.71-phase555
RSR-B 80-750/11110013954475390250139075076344.93-phase²570
RSR-B 120-500/111100114545254401701140500106345.13-phase²585
RSR-B 120-750/111100139545254402501390750106346.63-phase¹600
RSR-B 120-1000/1111001645452544033016401000106349.33-phase¹605
             
Continuous operation            
RSR 80-500/111100250510451655170154050076343.71-phase555
RSR 80-750/111100275510451655250179075076344.93-phase²570
RSR 120-500/1111002505104517151701540500106345.13-phase²585
RSR 120-750/1111002755104517152501790750106346.63-phase¹600
RSR 120-1000/11110030051045171533020401000106349.33-phase¹605
             
RSR 80-500/131300250510451655170154050076346.33-phase¹555
RSR 80-750/131300275510451655250179075076349.63-phase¹570
RSR 120-500/1313002505104517151701540500106348.13-phase¹585
RSR 120-750/13130027551045171525017907501063412.93-phase¹600
RSR 120-1000/131300300510451715330204010001063412.93-phase¹605
¹Heating only between two phases *Please see page 60 for more information about supply voltage
²Heating only between phase 1 and neutral 4Without tube
³Tmax is reached outside the tube. Realistic working temperature inside the tube is approx. 50 °C lower. 5Only for reactors

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Tube Furnaces for Integration into Customized Systems
 PRODUCT IMAGE PRODUCT IMAGE
 RS 120/1000/11S in divided version. Both half furnaces are manufactured identically and will be integrated in an extisting gas-heating system with space-saving design RS 100/250/11S in split-type design for integration into a test stand
PRODUCT IMAGE

Tube furnace with five-zone control for optimal temperature uniformity

PRODUCT IMAGE

Bolts for connection of two separated half furnaces

With their high level of flexibility and innovation, Nabertherm offers the optimal solution for customer-specific applications.

Based on our standard models, we develop individual solutions for integration in overriding process systems. The solutions shown on this page are just a few examples of what is feasible. From working under vacuum or protective gas via innovative control and automation technology for a wide selection of temperatures, sizes, lenghts and other properties of tube furnace systems – we will find the appropriate solution for a suitable process optimization.

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Working Tubes for Rotary Tube Furnaces: Standard (●) and Options (¡)
  
  
MeasurementsArticle No.¹Rotary tube furnace, continuous operationBatch operation
outer Ø x inner Ø x lengthwork tube spare tubeRSRRSR-B
   1100 °C1300 °C1100 °C
   80-50080-750120-500120-750120-100080-50080-750120-500120-750120-100080-50080-750120-500120-750120-1000
Ceramic tube C 530                 
80 x 65 x1540 mm601404699691404536              
80 x 65 x 1790 mm601404700691404537              
80 x 65 x 2040 mm601404701691404538               
110 x 95 x 1540 mm601404702691404539              
110 x 95 x 1790 mm601404703691403376              
110 x 95 x 2040 mm601404704691404540              
Ceramic tube C 610                 
80 x 65 x1540 mm601404705691404541               
80 x 65 x 1790 mm601404706691404542               
80 x 65 x 2040 mm601404707691404543               
110 x 95 x 1540 mm601404708691404544               
110 x 95 x 1790 mm601404709691404561               
110 x 95 x 2040 mm601404710691403437               
Quartz glass tube                 
76 x 70 x 1540 mm601404711691404545              
76 x 70 x 1790 mm601404712691404546              
76 x 70 x 2040 mm601404713691404547               
106 x 100 x 1540 mm601404714691403519              
106 x 100 x 1790 mm601404715691403305              
106 x 100 x 2040 mm601404716691404548              
Quarz glass tube with pimple                 
76 x 70 x 1540 mm601404717691404549               
76 x 70 x 1790 mm601404718691404550               
76 x 70 x 2040 mm601404719691404551               
106 x 100 x 1540 mm601404720691404552               
106 x 100 x 1790 mm601404721691403442               
106 x 100 x 2040 mm601404722691404553               
Quartz glas reactor                 
76 x 70 x 1140 mm601402746691402548              
76 x 70 x 1390 mm601402747691402272              
106 x 100 x 1140 mm601402748691402629              
106 x 100 x 1390 mm601402749691402638              
Quartz glass reactor with pimples                 
76 x 70 x 1140 mm601404723691402804               
76 x 70 x 1390 mm601404724691403429               
106 x 100 x 1140 mm601404725691403355               
106 x 100 x 1390 mm601404726691403296               
Quarz glass mixing reactor                 
76 x 70 x 1140 mm601404727691403407               
76 x 70 x 1390 mm601404728691404554               
106 x 100 x 1140 mm601404732691404557               
106 x 100 x 1390 mm601404733691404558               
l Standard working tube ¹Tubes/reactors incl. mounted sleeves for connection to the rotary drive. Spare tubes come without sleeves.
Working tube available as an option

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Working Tubes: Standard (●) and Options (¡)
  
  
Working tubeArticle No.Model
outer Ø x inner Ø x length RRSRHTCRHTHRHTV
  50-25050-500100-750120-100080-30080-50080-750120-500120-750120-1000170-750170-100080-23080-45080-710120-150120-300120-600120-150120-300120-600
C 530                      
40 x 30 x 450 mm692070274                     
40 x 30 x 700 mm692070276                     
50 x 40 x 450 mm692070275                    
50 x 40 x 700 mm692070277                    
60 x 50 x 650 mm692070106                     
60 x 50 x 850 mm692070305                     
60 x 50 x 1100 mm692070101                     
70 x 60 x 1070 mm692070048                     
80 x 70 x 650 mm692070036                    
80 x 70 x 850 mm692070108                    
80 x 70 x 1100 mm692070109                    
95 x 80 x 1070 mm692070049                    
120 x 100 x 850 mm692070110                    
120 x 100 x 1100 mm692070111                    
120 x 100 x 1350 mm692070131                    
120 x 100 x 1400 mm692070279                    
170 x 150 x 1100 mm692071659                    
170 x 150 x 1350 mm692071660                    
Vacuum tube¹ C 610                      
60 x 50 x 1030 mm692070179                     
60 x 50 x 1230 mm692070180                     
60 x 50 x 1480 mm692070181                     
80 x 70 x 1230 mm692070182                     
80 x 70 x 1480 mm692070183                     
120 x 100 x 1230 mm692070184                     
120 x 100 x 1480 mm692070185                     
120 x 100 x 1730 mm692070186                     
170 x 150 x 1480 mm692070187                     
170 x 150 x 1730 mm692070188                     
C 799                      
50 x 40 x 380 mm692071664                   
50 x 40 x 530 mm692071665                     
50 x 40 x 830 mm692070163                    
80 x 70 x 600 mm692070600                    
80 x 70 x 830 mm692071670                   
80 x 70 x 530 mm692071669                   
80 x 70 x 1080 mm692071647                    
120 x 105 x 830 mm692071713                   
Vacuum tube¹ C 799                      
50 x 40 x 990 mm692070149                     
50 x 40 x 1140 mm692070176                     
50 x 40 x 1440 mm692070177                    
80 x 70 x 990 mm692070190                     
80 x 70 x 1140 mm692070148                     
80 x 70 x 1210 mm692070191                     
80 x 70 x 1470 mm692070192                     
80 x 70 x 1440 mm692070178                    
120 x 105 x 1440 mm692070147                    
Vacuum tube² APM                      
75 x 66 x 1090 mm691402564                     
75 x 66 x 1290 mm691402565                     
75 x 66 x 1540 mm691400835                     
115 x 104 x 1290 mm691402566                     
115 x 104 x 1540 mm691402567                     
115 x 104 x 1790 mm691402568                     
164 x 152 x 1540 mm691402569                     
164 x 152 x 1790 mm691402570                     
Vacuum quartz glass tube                      
60 x 54 x 1030 mm691404422                     
60 x 54 x 1230 mm691404423                     
60 x 54 x 1480 mm691404424                     
80 x 74 x 1230 mm691404425                     
80 x 74 x 1480 mm691404426                     
120 x 114 x 1230 mm691404427                     
120 x 114 x 1480 mm691404428                     
120 x 114 x 1730 mm691404429                     
170 x 162 x 1480 mm691404430                     
170 x 162 x 1730 mm691404431                     
¹With grinded tube ends for the use with water-cooled end flanges ● Standard working tube
²With attached holder for gas tight flange Working tube available as an option
³Tubes/reactors incl. mounted sleeves for connection to the rotary drive. Spare tubes come without sleeves.

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Gas Supply Systems/Vacuum Operation for Tube Furnaces RD, R, RT, RHTC, RHTH, RHTV, RS and RSR
  
  
PRODUCT IMAGE

Gas supply system 1: Fiber plugs with protective gas connection, suitable for many laboratory applications

PRODUCT IMAGE

Water-cooled stainless steel flange

PRODUCT IMAGE

Gas supply system for non-flammable protective or reactive gas with shutoff valve and flow meter with regulator valve, piped and ready to connect

PRODUCT IMAGE

Observation window as additional equipment for gas tight flanges

When equipped with various equipment packages, the tube furnace product lines RS, RHTC, RHTH, and RHTV can be adapted for operation with nonflammable or flammable gasses or for vacuum operation.

Gas Supply System 1 for non-flammable protective or reactive gases (no vacuum operation)

This package represents a basic version sufficient for many applications, for operation with non-flammable protective or reactive gasses. The standard working tube made of ceramic C 530 delivered with the furnace can still be used.

  • Standard working tube can be used
  • 2 plugs of ceramic fiber with protective gas connections
  • Gas supply system for nonflammable protective gas (Ar, N2, forming gas) with shutoff valve and flow meter with control valve (volume 50-500 l/hr), piped and ready to connect (gas intake pressure at 300 mbar to be provided by customer)

Additional equipment

  • Extension of gas supply system with a second or third nonflammable type of gas
  • Bottle pressure regulator for use with bottled gas
  • Automatically controlled gas supply with solenoid valves on the gas supply system, which can be switched on and off through a controller with programmable extra functions (e.g. P 330)
Gas Supply System 2 for non-flammable protective or reactive gases/vacuum operation

For increased atmospheric purity requirements in the working tube, we recommend this gas supply system. The standard working tube is replaced by a dense working tube of ceramic C 610 or C 799 in a gas tight design. Besides the longer working tube, the scope of delivery also includes gas tight flanges and a corresponding bracket system in the furnace. The system can also be equipped for vacuum operation.

  • Longer, gas tight working tube of ceramic C 610 for furnaces to 1300 °C or of C 799 for temperatures above 1300 °C
  • 2 vacuum-tight, water-cooled stainless steel flanges with fittings on the outlet side (cooling water supply with NW9 hose connector to be provided by the customer)
  • Mounting system on furnace for the flanges
  • Gas supply system for nonflammable protective gas (Ar, N2, forming gas) with shutoff valve and flow meter with control valve (volume 50-500 l/hr), gas outlet valve, piped and ready to connect (gas intake pressure at 300 mbar to be provided by customer)

Additional equipment

  • Extension of gas supply system with a second or third nonflammable type of gas
  • Bottle pressure regulator for use with bottled gas
  • Automatically controlled gas supply with solenoid valves on the gas supply system, which can be switched on and off through a controller with programmable extra functions (e.g. P 330)
  • Water-cooled end flange with quick connectors
  • Cooling unit for closed loop water circuit
  • Window for charge observation in combination with gas tight flanges

Vacuum Operation

  • Vacuum package for evacuation of the working tube, consisting of connector for the gas outlet, 1 ball valve, manometer, manually operated rotary vane vacuum pump with corrugated stainless steel hose connected to the gas outlet, max. attainable end pressure in working tube about 10-2 mbar
  • Alternative pumps for max. final pressure of up to 10-5 mbar on request

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PRODUCT IMAGE

RHTH 120-600/18 with gas supply system 4 for hydrogen operation

PRODUCT IMAGE

Water-cooled end flange with quick connectors as additional equipment

Gas Supply System 4 for hydrogen, fully-automatic, unattended operation

Adding gas supply system 4 to the tube furnace allows operation under a hydrogen atmosphere. During hydrogen operation, a safety pressure of approx. 30 mbar is ensured in the working tube. Surplus hydrogen is burnt off in an exhaust gas torch. With extended safety logic and an integrated nitrogen purge container, the system can be used for fully-automatic, unattended operation. Equipped with a Safety-PLC control system, pre-purging, hydrogen inlet, operation, fault monitoring and purging at the end of the process are carried out automatically. In case of default, the tube is immediately purged with nitrogen and the system is automatically switched to a safe status.

  • Safety system for operation with flammable gases including monitoring of torch function and overpressure
  • Extended safety control system with emergency tube purging in case of default
  • Emergency purge container
  • Safety-PLC control system with touchpanel for data input
  • Longer, gas tight working tube
  • 2 vacuum-tight, water-cooled stainless steel flanges (cooling water supply to be provided by customer via hose connector)
  • Exhaust gas torch
  • Pressure switch for monitoring the safety pressure
  • Gas supply system for H2 and N2. Volume adjustment is carried out by hand (the customer provides an H2 supply at 1 bar, an N2 supply at 10 bar, an O2 supply at 6-8 bar and a propan supply at 300 mbar)

Additional equipment

  • Gas supply system extension for additional nonflammable gas types
  • Operation with other flammable gases on request
  • Bottle pressure reducer for use with bottled gas
  • Cooling unit for closed loop water circuit
  • Vacuum packages (with hydrogen operation, this package can only be used for pre-evacuation)
  • Gas supply via program-dependent, controllable mass flow controllers

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Vacuum Pumps
  
  
PRODUCT IMAGE

Vacuum pump stand for operation up to 10-5 mbar

PRODUCT IMAGE

Independent pressure gauge for a pressure range of 10-3 mbar or 10-9 mbar

With respect to the final pressure different pumps are available

  • Single-step rotary piston pump for a max. final pressure of approx. 20 mbar.
  • Two-step rotary piston pump for a max. final pressure of approx. 10-2 mbar.
  • Turbomolecular pump stand (rotary vane pump with following turbomolecular pump for a max. final pressure of 10-5 mbar.
  • Independent pressure gauge for a pressure range of 10-3 mbar or 10-9 mbar as additional equipment
Information:

For protection of the vacuum pump only cold stage evacuation is allowed. The reduction of working tube strengthness limits the max. possible working temperature under vacuum

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Control Alternatives for Tube Furnaces
  
  
PRODUCT IMAGE

Furnace control

PRODUCT IMAGE

Charge control

PRODUCT IMAGE

Thermocouple for charge control in the RHTH 120/600/18 furnace

PRODUCT IMAGE

Sintering under hydrogen in a tube furnace of RHTH product line

Three-Zone Furnace Chamber Control

The temperature is measured by thermocouples positioned outside of the working tube, one in the middle and two on the sides. The outer zones are controlled with a setpoint-offset in relation to the middle zone. This allows the heat loss at the ends of the tube to be compensated to ensure an extended zone of constant temperature (ΔT ≤ 10 K).

Furnace Chamber Control
with temperature measurement in furnace chamber outside the working tube.

  • Advantages: Thermocouple protected against damage and aggressive load, very even control, attractive price
  • Disadvantage: Process-dependent temperature difference between displayed temperature on the controller and inside the tube

Extension Package for Furnace Chamber Control

  • with additional temperature measurement in the working tube and display of the measured temperature

Charge Control
with temperature measurement both in the furnace chamber outside the working tube as well as in the working tube.

  • Advantages: Very precise and rapid control adjustment
  • Disadvantage: Costs
Furnace Chamber vs. Charge Control ComparisonFurnace Chamber Control

Only the furnace chamber temperature is measured and controlled. Regulation is carried out slowly to avoid out-of-range values. As the charge temperature is not measured and controlled, it may vary a few degrees from the chamber temperature.

Charge Control

If the charge control is switched on, both the charge temperature and furnace chamber temperature are measured. By setting different parameters the heat-up and cooling processes can be individually adapted. This results in a more precise temperature control at the charge.

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Thermocouple Calibration Set
PRODUCT IMAGE PRODUCT IMAGE
Thermocouple calibration set, consisting of calibrated temperature display, calibrated reference thermocouple and tube furnace
PRODUCT IMAGE

Calibrated thermocouples in various designs

For heat treatment processes, continuous quality can only be ensured by the regular calibration of control or charge thermocouples. The calibration set can be used with every tube furnace which is equipped with heating transformer (models R../13, RS../13, RHTH, RHTV) for professional calibration of thermocouples.

The thermocouple calibration set is mounted in a compact housing and consists of a temperature display unit for two thermocouples, a reference thermocouple with compensation wire and a plug connection for different types of thermocouples. Both the display unit and the whole measuring circuit to the reference thermocouple are calibrated ex works and are supplied with a calibration certificate.

The set is used with a tube furnace, e.g. model R 50/250/13. For calibration, the furnace is set for one temperature. From one side, the reference thermocouple is inserted into the working tube. From the other side, the thermocouple to be tested is positioned in the tube. The measuring points of both thermocouples must face as close as possible to each another. Depending on the furnace model, a ceramic temperature compensation block can be offered for the positioning of both thermocouples. After a defined period of time, the temperature of both thermocouples can be read off from the display unit of the thermocouple calibration set and be compared.

  • Compact housing
  • 1-phase connection
  • Digital display unit for the test thermocouple and the reference thermocouple, with calibration certificate in steps of 100  °C
  • Reference thermocouple, type N, with calibration certificate (for 3 temperatures)
  • Thermocouple inputs type K, S, N for test thermocouples. Only one input per measurement is possible.
  • Furnace has to be ordered separately

Additional equipment

  • Reference thermocouple type K or type S
  • Further thermocouple inputs for specimen, e.g. type B, type J or type R
  • Fiber plug with passages and ceramic temperature compensation block for the support of the thermocouples in the test furnace

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