Laboratory /
Tube Furnaces up to 1800 °C

Compact Tube Furnaces up to 1100 °C

Tube furnace RD 30/200/11

Controller R7

Gas panel for one non-flammable protective or reactive gas (N2, Ar, He, CO2, air, forming gas)

Example of an over-temperature limiter

The RD 30/200/11 tube furnace impresses with its very good price-performance ratio, particularly compact external dimensions and its low weight. This all-rounder is equipped with a working tube, which also serves as support for the heating wires. The working tube is therefore part of the furnace heating, with the advantage that the tube furnace reaches very high heating speeds. The furnace is designed for horizontal use up to 1100 °C.

Standard Equipment

  • Tmax 1100 °C
  • Inner diameter of the tube: 30 mm, heated length: 200 mm
  • Ceramic working tube C 530 including two fiber plugs for operation under air
  • Thermocouple type K (1100 °C)
  • Heating wires wound directly around the working tube resulting in very fast heat-up rates
  • Controller R7

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
  • Gas supply system 1 for non-flammable protective or reactive gas
ModelTmax1Outer dimensions2 in mmInner tube ØHeated lengthLength constantConnectedHeating time3ElectricalWeight
 in °CWDHin mmin mmtemperature1 +/− 5 K in mmload in kWin minconnection*in kg
RD 30/200/11110035020035030200651.5201-phase12
1Values outside the tube. Difference to temperature inside the tube up to + 50 K*Please see page 75 for more information about supply voltage
2External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.
3Heating time of the empty and closed furnace up to Tmax −100 K (connected to 230 V 1/N/PE)
 

Compact Tube Furnaces up to 1300 °C

Tube furnace R 170/1000/13 Tube furnace R 50/250/13 with gas supply system 2

Tube furnace R 50/500/12 with three zone control

Gas panel for one non-flammable protective or reactive gas (N2, Ar, He, CO2, air, forming gas)

Thermocouple for charge control

These compact 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 tube furnaces have a very good price/performance ratio.

Standard Equipment

  • Tmax 1200 °C or 1300 °C
  • Single-zoned design
  • Outer tube diameter of 50 mm to 170 mm, heated length from 250 mm to 1000 mm
  • Ceramic working tube C 530 including two fiber plugs for operation under air
  • Thermocouple type N (1200 °C) or type S (1300 °C)
  • Heating elements on support tubes provide for free radiation
  • Controller B410 (5 programs with each 4 segments)

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
  • Three-zoned design (heated length from 500 mm) for optimization of temperature uniformity
  • Gas supply systems 1, 15, 2, 3 or 4
ModelTmax1Outer dimensions3 in mmOuter tube ØHeated Length constant1Tube lengthConnectedElectricalWeight
      lengthtemperature +/− 5 K in mm load   
 in °CW2DHin mmin mmsingle-zonedthree-zonedin mmin kWconnection*in kg
R 50/250/1212004343405085025080-4501.61-phase22
R 50/500/121200670340508505001702507002.341-phase34
R 120/500/1212006704105781205001702507006.53-phase44
R 170/750/121200920460628170750250375107010.03-phase74
R 170/1000/12120011704606281701000330500140011.53-phase89
             
R 50/250/1313004343405085025080-4501.61-phase22
R 50/500/131300670340508505001702507002.341-phase34
R 120/500/1313006704105781205001702507006.53-phase44
R 170/750/131300920460628170750250375107010.03-phase74
R 170/1000/13130011704606281701000330500140011.53-phase89
1Values outside the tube. Difference to temperature inside the tube up to + 50 *Please see page 75 for more information about supply voltage
2Without tube 4Only valid for single-zone version
3External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.
 

Split-Type Tube Furnaces for Horizontal or Vertical Operation up to 1300 °C

Tube furnace RSH 50/500/13 Tube furnace RSH 120/750/13 with gas supply system 4 for hydrogen applications

Tube furnace RSV 170/1000/11 with gas-tight quartz glass working tube and water-cooled vacuum flanges

Tube furnace RSH 80/500/13 with gas tight tube and water-cooled flanges

RSH 120/500/13S with sliding furnace

RSH 210/1000/11S with quartz glass working tube and gas supply package 2

These tube furnaces can be used for horizontal (RSH) or vertical (RSV) operation. The split-type design makes it easy to change the working tube. It allows for a comfortable exchange of various working tubes (e.g. working tubes made of different materials).

Using a wide range of accessories, these professional tube furnaces can be optimally tailored for your process. By adding different gas supply packages, you can work in a protective gas atmosphere, with gases or in a vacuum. In addition to the convenient standard controllers, modern PLC controls can also be used to control the process.

Standard Equipment

  • Tmax 1100 °C or 1300 °C
  • Single-zoned design
  • RSV models with frame for vertical operation
  • Split-type design for simple insertion of the working tube (opening temperature < 180 °C)
  • Ceramic working tube C 530 including two fiber plugs for operation under air
  • Thermocouple type N (1100 °C) or type S (1300 °C)
  • Heating elements on support tubes provide for free radiation
  • RSH: switchgear and control unit integrated in furnace housing
  • RSV: switchgear and control unit separate from furnace in own wall or standing cabinet
  • Controller B410

Additional Equipment

  • Charge control with temperature measurement in the working tube
  • Three-zone control for optimization of temperature uniformity
  • Cooling systems for accelerated cooling of the working tube and charge
  • Gas supply systems 1,15 or 2 for non-flammable protective or reactive gas operation
  • Gas supply packages 3 or 4 for hydrogen operation
  • Vacuum package to evacuate the working tube
ModelTmax1Outer dimensions2 in mmMax. outer tube ØHeated length Length constant 
temperature1 +/− 5 KTube length
Connected load4 
in kWElectrical
Weight
       in mm   in
 in °CW3DHin mmin mmsingle zonedthree zonedin mm1100 °C1300 °Cconnection*kg
RSH 50/250/.. 4203755105025080-650 1.9 1.91-phase25
RSH 50/500/.. 67037551050500170250850 3.4 3.41-phase536
RSH 80/500/.. 67044558080500170250850 6.6 6.63-phase546
RSH 80/750/..1100920495630807502503751100 10.6 12.03-phase576
RSH 120/500/..or670445580120500170250850 6.6 6.63-phase546
RSH 120/750/..13009204956301207502503751100 10.6 12.03-phase576
RSH 120/1000/.. 117049563012010003305001350 13.7 13.73-phase591
RSH 170/750/.. 9204956301707502503751100 10.6 12.03-phase576
RSH 170/1000/.. 117049563017010003305001350 13.7 13.73-phase591
              
RSV 50/250/.. 5455909755025080-650 1.9 1.91-phase25
RSV 50/500/.. 545590122550500170250850 3.4 3.43-phase536
RSV 80/500/.. 615590122580500170250850 6.6 6.63-phase546
RSV 80/750/..11006655901475807502503751100 10.6 12.03-phase576
RSV 120/500/..or6155901225120500170250850 6.6 6.63-phase546
RSV 120/750/..130066559014751207502503751100 10.6 12.03-phase576
RSV 120/1000/.. 665590172512010003305001350 13.7 13.73-phase591
RSV 170/750/.. 66559014751707502503751100 10.6 12.03-phase576
RSV 170/1000/.. 665590172517010003305001350 13.7 13.73-phase591
1Values outside the tube. Difference to temperature inside the tube up to + 50 K*Please see page 75 for more information about supply voltage
2External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.
3Without tube
4At 415 volt
5At 3-phase execution an N conductor ist required (3/N/PE)
 

Rotary Tube Furnaces for Batch Operation up to 1100 °C

Rotary tube furnace RSRB 80/500/11 as tabletop version for batch operation RSRB 170/1000/11 H2 with gas supply package 4 for hydrogen application

Rotary tube furnace RSRB 120/500/11 S with tilting mechanism to the left/to the right

Gas tight closing plug for tubes made of quartz glass closed at one side as additional equipment

Gas tight rotating union with gas cooler and charge thermocouple

Connection set for vacuum operation

The rotary tube furnaces of the RSRB series are suited for batch operation. The rotation of the working tube ensures that the charge is in motion. Due to the shape of the quartz reactor with the tapered pipe ends the batch is kept in the rotary tube furnace and can be heat-treated an arbitrarily long time period time. A controlled heating to the temperature profiles is also possible.

Standard Equipment

  • Tmax 1100 °C
  • Single-zoned design
  • Thermocouple type N
  • Heating elements on support tubes provide for free radiation
  • Tube furnace designed as table-top model with quartz glass reactor which opens on both sides, tapered ends
  • Reactor is removed for emptying out of the rotary tube furnace. Beltless drive and hinged furnace housing (opening temperature < 180 °C) provide for very easy removal through
  • Adjustable drive of approx. 1-40 rpm
  • Controller B410 (5 prgrams with each 4 segments)

Additional Equipment

  • Charge control with temperature measurement in the working tube
  • Three-zone control for optimization of temperature uniformity
  • Reactor open on both sides, made of quartz glass with knobs for better mixing of the charge in the tube
  • Gas supply package 25 for operation under non-flammable protective or reaction gases with a gas-tight rotating outlet
  • Gas supply packages 3 or 4 for hydrogen operation
  • Vacuum package for evacuating the working tube, depending on the pump used up to 10−2 mbar
  • Left/right tilting device for easier loading and unloading of the work tube
    • For filling, the furnace is tilted to the right to convey the batch into the furnace. After the heat treatment, the furnace is swiveled to the opposite side for emptying, in order to convey the product out of the reactor again. It is not necessary to remove the reactor.
    • Mixing reactor made of quartz glass with integrated blade for better mixing of the batch, closed on one side, large opening on the opposite side
    • Rotary tube furnace assembled on base with integrated switchgear and controller, incl. transport casters
ModelTmax1Outer dimensions2 in mmMax. outer Ø TerminalHeatedLength constant Tube lengthConnectedElectricalWeight
  (Table-top model)tube ØendlengthTemperature1 +/− 5 K 
in mm load in
 in °CWDHin mmin mmin mmsingle zonedthree zonedin mmin kWconnection*kg
RSRB 80/500/1111001145475390762850017025011403.71-phase100
RSRB 80/750/1111001395475390762875025037513904.93-phase3115
RSRB 120/500/11110011455254401062850017025011405.13-phase3105
RSRB 120/750/11110013955254401062875025037513906.63-phase4120
RSRB 120/1000/111100164552544010628100033050016409.33-phase4125
1Values outside the tube. Difference to temperature inside the tube up to + 50 K *Please see page 75 for more information about supply voltage
2External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.
3Heating only between phase 1 and neutral
4Heating only between two phases
 

Rotary hearth furnaces for processes with continuous movement up to 1300 °C

Rotary tube furnace RSRC 120750/13 Rotary tube furnace RSRC 80/500/11 with feeding system and gas supply system 26 for processes under protective gas

Vibration unit at the charging funnel for improved powder supply

Vibrating channel on the rotary tube for convenient material feeding

Screw-conveyors with different pitches

Screw-conveyor with variable speed

The rotary tube furnaces of the RSRC series are particularly suitable for processes in which continuously running batch material is heated short-time. These rotary furnaces can be used very flexibly for various purposes. The rotary tube furnace is slightly inclined and brought to the target temperature. The material is then fed continuously at the top of the pipe. It passes through the heated zone of the tube and falls out of the pipe at the lower end. The time of the heat treatment depends on the angle of inclination, the speed of rotation and the length of the working tube, as well as from the flow properties of the batch material. Equipped with the optionally available closed feeding system, the rotary tube furnace can also be used for processes in a defined atmosphere or in a vacuum. Depending on the process, batch and required maximum temperature, work tubes made of different materials are used.

Standard Equipment

  • Tmax 1100 °C
    • Working tube made of quartz glass open at both sides
    • Thermocouple type N
  • Tmax 1300 °C
    • Open ceramic tube C 530
    • Thermocouple type S
  • Heating elements on support tubes provide for free radiation
  • Adjustable drive of approx. 0.5-20 rpm
  • Digital display unit for the tilting angle of the rotary tube furnace
  • Split-type furnace housing (opening temperature < 180 °C) provide for easy tube change
  • Compact system, rotary tube furnace positioned on a base frame with
    • Manual spindle drive with crank to set the tilting angle
    • Switchgear and controls integrated
    • Castors
  • Controller B400 (5 prgrams with each 4 segments)

Additional Equipment

  • Charge control with temperature measurement in the working tube
  • Three-zone control for optimization of temperature uniformity
  • Alternative work tubes for different process requirements
  • Quartz glass batch reactors (Tmax 1100 °C)
  • Higher temperatures up to 1500  °C available on request
  • Vibrating channel on the rotary tube for convenient material supply, suitable for processes in air
  • Powder discharge tube for easy material discharge, suitable for processes in air
  • Feeding system for the continuous delivery of 5 liters of material under a defined atmosphere or vacuum, consisting of:
    • Stainless steel funnel incl. electric vibration unit to optimize the material feeding into the working tube
    • Electrically driven screw-conveyor at the inlet of the working tube with 10, 20 or 40 mm pitch and adjustable speed between 0.25 and 20 rpm
    • Collecting bottle made of laboratory glass at the outlet of the working tube
  • Gas supply package 26 for operation under non-flammable protective or reaction gases (only in connection with the feeding system)
  • Gas supply packages 3 or 4 for hydrogen applications (only in connection with feeding system)
  • Vacuum package for evacuating the working pipe, depending on the pump used up to 10−2 mbar
ModelTmax1Outer dimensions2 in mmMax. outer HeatedLength constant Tube lengthConnectedElectricalWeight
     tube ØlengthTemperature1 +/− 5 K in mm load in
 in °CWDHin mmin mmsingle zonedthree zonedin mmin kWconnection*kg
RSRC 80/500/1111002505104516558050017025015403.71-phase555
RSRC 80/750/1111002755104516558075025037517904.93-phase3570
RSRC 120/500/11110025051045171511050017025015405.13-phase3585
RSRC 120/750/11110027551045171511075025037517906.63-phase4600
RSRC 120/1000/111100300510451715110100033050020409.33-phase4605
             
RSRC 80/500/1313002505104516558050017025015406.33-phase4555
RSRC 80/750/1313002755104516558075025037517909.63-phase4570
RSRC 120/500/13130025051045171511050017025015408.13-phase4585
RSRC 120/750/131300275510451715110750250375179012.93-phase4600
RSRC 120/1000/1313003005104517151101000330500204012.93-phase4605
1Values outside the tube. Difference to temperature inside the tube up to + 50 K *Please see page 75 for more information about supply voltage
2External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.
3Heating only between phase 1 and neutral
4Heating only between two phases
 

Tube Furnaces with Stand for Horizontal and Vertical Operation up to 1500 °C

Tube furnace RT 50/250/13 Horizontal operation

Gas panel for one non-flammable protective or reactive gas (N2, Ar, He, CO2, air, forming gas)

Example of an over-temperature limiter

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 tube furnaces suitable for integration into existing process systems.

Standard Equipment

  • Tmax 1100 °C, 1300 °C, or 1500 °C
  • Compact design
  • Vertical or horizontal operation infinitely adjustable
  • Angle infinitely adjustable from 0 to 90
  • Working height infinitely adjustable
  • Operation also possible without stand if safety guidelines are observed
  • Ceramic working tube C 530 including two fiber plugs for operation under air
  • Type S thermocouple
  • Heating wires wound directly around the working tube resulting in very fast heat-up rates
  • Control system integrated in furnace base
  • Controller B410 (5 programs with each 4 segments)

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
  • Gas supply system 1 for non-flammable protective or reactive gas
ModelTmax1Outer dimensions2 in mmInner tube ØHeated Length constantTube lengthConnectedElectricalWeight
 
in °C
W
D
H
in mmlength 
in mmtemperature1 +/− 5 K in mm
in mmload
in kW
connection*
in kg
RT 50/250/11110035038074050250803601.81-phase25
RT 50/250/13130035038074050250803601.81-phase25
RT 30/200/15150044547574030200703601.81-phase45
1Values outside the tube. Difference to temperature inside the tube up to + 50 K*Please see page 75 for more information about supply voltage
2External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.
 

High-Temperature Tube Furnaces with SiC Rod Heating up to 1500 °C

Tube furnace RHTC 80/450/15 Tube furnace RHTC 80-230/15 with gas supply system 2

SiC rod heating

Thermocouple for charge control

These compact tube furnaces with SiC rod heating and integrated switchgear with controller can be used universally for many processes. They represent an inexpensive variant in the high-temperature range. The standard mounting options for accessories make them flexible in use for a wide range of applications. The SiC heating elements arranged parallel to the working tube provide for an excellent temperature uniformity.

Standard Equipment

  • Tmax 1500 °C
  • Active cooling of housing for low surface temperatures
  • Ceramic working tube C 799 including two fiber plugs for operation under air
  • Type S thermocouple
  • SiC heating elemens, easy to replace
  • Controller B410 (5 programs with each 4 segments)

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
  • Gas supply systems 1, 2, 3 or 4
ModelTmax3Outer dimensions4 in mmOuter tube ØHeated lengthLength constantTube lengthConnectedElectricalWeight
 in °CWDHin mmin mmtemperature3 +/− 5 K in mmin mmload in kWconnection*in kg
RHTC 80/230/15150060044058580230806007.53-phase250
RHTC 80/450/1515008204405858045015083011.33-phase170
RHTC 80/710/151500107544058580710235108013.83-phase190
1Values outside the tube. Difference to temperature inside the tube up to + 50 K *Please see page 75 for more information about supply voltage
2External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.
3Heating only between phase 1 and neutral
4Heating only between two phases
 

High-Temperature Tube Furnaces for Horizontal or Vertical Operation up to 1800 °C

Tube furnace RHTV 50/150/17 with stand and gas supply system 2 RHTH 80/300/18 tube furnace with water-cooled flanges and charge control

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

Tube furnace RHTH 120/600/17

Sintering under hydrogen in a tube furnace of RHTH product line

Example of over-temperature limiter

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 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.

Standard Equipment

  • Tmax 1600 °C, 1700 °C, or 1800 °C
  • Single-zoned design
  • Insulation with vacuum-formed ceramic fiber plates
  • Tube furnaces RHTV with frame for vertical operation
  • Type B thermocouple
  • Ceramic working tube C 799 including two fiber plugs for operation under air
  • Hanging and easy to change MoSi2 heating elements
  • Power unit with low-voltage transformer and thyristor
  • 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 and with selectable maximum temperature gradient as tube protection
  • Switchgear and control unit separate from furnace in separate floor standing cabinet
  • Controller P470 (50 programs with each 40 segments)

Additional Equipment

  • Charge control with temperature measurement in the working tube
  • Three-zone control for optimization of temperature uniformity (only horizontal tube furnaces RHTH)
  • Gas supply system 2 for non-flammable protective or reactive gas operation
  • Gas supply packages 3 or 4 for hydrogen operation
  • Vacuum package to evacuate the working tube
Model 
Horizontal designTmax1Outer dimensions3 in mmMax. outer tube ØHeated lengthLength constant 
temperature1 +/− 5 KTube lengthConnected loadElectricalWeight
       in mm    
 in °CW2DHin mmin mmsingle zonedthree zonedin mmin kWconnection*in kg
RHTH 50/150/..1600 or4704806405015050703805.43-phase470
RHTH 80/300/..1700 or620550640803001001505309.03-phase490
RHTH 120/600/..180092055064012060020030083014.43-phase4110
ModelTmax1Outer dimensions3 in mmMax. outer tube ØHeated lengthLength constant 
temperature1 +/− 5 KTube lengthConnected loadElectricalWeight
Vertical designin °CWDH2in mmin mmin mmin mmin kWconnection*in kg
RHTV 50/150/..1600 or50065051050150303805.43-phase470
RHTV 80/300/..1700 or580650660803008053010.33-phase490
RHTV 120/600/..180058065096012060017083019.03-phase4110
1Values outside the tube. Difference to temperature inside the tube up to + 50 K *Please see page 75 for more information about supply voltage
2Without tube
3External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.
4Heating only between two phases
 

Gas Supply Systems/Vacuum Package for Tube Furnaces

Fiber plug with protective gas connection, suitable for many laboratory applications (gas supply system 1)

When equipped with different gas supply systems, most tube furnace product lines can be adapted for operation with non-flammable or flammable gases or for vacuum operation.

Gas Supply System 1 For Non-Flammable Protective or Reactive Gases in Static Tube Furnaces, not Gas-Tight

Gas supply system 1 is a basic version for static tube furnaces, for operation with non-flammable protective or reactive gases. This system is not completely gas-tight and can therefore not be used for vacuum operation.

Standard Equipment

  • Available for RD, R, RT, RHTC, RSH and RSV tube furnaces
  • Two plugs made of porous, non-classified ceramic fiber incl. protective gas connections
  • The standard working tube supplied with the furnace can be used
  • Gas panel for one non-flammable protective or reactive gas (N2, Ar, He, CO2, air, forming gas*)
  • Shut-off valve and flow meter with manual valve
  • Supply of gas with 300 mbar required

Additional Equipment

  • Additional gas panels for further non-flammable gases
  • Automatic segment-related switching on/off by a magnetic valve
  • Bottle pressure reducer for use with bottled gas
 

Flange with heat radiation protection insert (gas supply system 15)

Water-cooled vacuum flange (gas supply system 2)

Water-cooled stainless steel flanges with quick locks as additional equipment

Window as additional equipment for gas-tight flanges

Gas Supply Systems 15 and 2 for Non-Flammable Protective or Reactive Gases in Static Tube Furnaces, Gas-Tight

For increased atmospheric purity requirements in the working tube in static tube furnaces we recommend one of these gas-tight gas supply systems with stainless steel flanges on the end of the tube is recommended.

The less expensive gas supply system 15 for furnaces up to 1300 °C and working tubes to 120 mm diameter is available for R, RSH and RSV tube furnaces. It includes contact protection on the flange and a stainless steel type 1.4301 heat radiation protection insert for the tube ends to protect the seals. A heat radiation protection package cools the flanges and a water connection is thus not required. With this variant, the tube must not be opened while it is hot. It is also not suitable for applications with a turbomolecular pump to achieve high vacuum. Gas supply system 2 is the correct choice for this type of application.

Gas supply system 2 with water-cooled flanges is available for R, RHTC, RHTH, RHTV, RSH and RSV furnaces. Cooling water supply with NW9 hose connector to be provided by the customer.

Standard Equipment

  • Extended gas-tight working tube made of C 610 for furnaces up to 1300 °C or C 799 for temperatures above 1300  °C
  • Two vacuum-tight stainless steel flanges with KF flange on the outlet side
  • Mounting system on furnace for the flanges
  • Gas panel for one non-flammable protective or reactive gas(N2, Ar, He, CO2, air, forming gas*)
  • Shut-off valve and flow meter with manual valve
  • Supply of gas with 300 mbar required
  • Check valve in the gas outlet to prevent air entering

Additional Equipment for Gas Supply Systems 15 and 2

  • Additional gas panels for further non-flammable gases
  • Automatic segment-related switching on/off by a magnetic valve
  • Bottle pressure reducer for use with bottled gas
  • Vacuum package for a maximum final pressure of up to 5 x 10−5 mbar

Other Additional Equipment only for Gas Supply System 2

  • Quick-locks for water-cooled flanges
  • Air-water heat exchanger for closed loop water circuit
  • Window for charge observation
 

Gas panel for one non-flammable protective or reactive gas (N2, Ar, He, CO2, air, forming gas*)

Gas Supply Systems 25 and 26 for Non-Flammable Protective or Reactive Gases in Rotary Tube Furnaces, Gas-Tight

Gas supply systems for non-flammable protective and reactive gases are also available for RSRB and RSRC rotary tube furnaces.

Standard Equipment

  • Gas panel for one non-flammable protective or reactive gas (N2, Ar, He, CO2, air, forming gas*)
  • Shut-off valve and flow meter with manual valve
  • Supply of gas with 300 mbar required
  • Gas supply system 25 for rotary tube furnaces for batch operation (RSRB) also includes gas-tight rotary lead-outs on the gas inlet and outlet as well as a gas cooler at the outlet. A check valve is also installed at the gas outlet to prevent air entering the tube.
  • For gas supply system 26 for rotary tube furnaces for continuous processes (RSRC) the furnace must also be equipped with a feeding system.

Additional Equipment

  • Additional gas panels for further non-flammable gases
  • Automatic segment-related switching on/off by a magnetic valve
  • Bottle pressure reducer for use with bottled gas
  • Vacuum package for a maximum final pressure of up to 5 x 10−2 mbar
 

Example of an over-temperature limiter

Gas panels with mass flow controllers

Gas Supply System 3 for Hydrogen Applications in Tube Furnaces above 750 °C

Gas supply system 3 allows for the operation in a hydrogen atmosphere at temperatures above 750 °C. From 750 °C, hydrogen can be introduced into the working tube. At program end or when the temperature falls below 750 °C , the working tube is purged with nitrogen to prevent the formation of an explosive hydrogen/oxygen atmosphere. The purging volume is at least five times the volume of the tube. Surplus hydrogen is burnt off in an exhaust gas torch.

Standard Equipment

  • Available for R, RHTC, RHTH, RHTV, RSH, RSV, RSRB and RSRC tube furnaces
  • Gas panel for hydrogen and nitrogen
  • Automatic segment-related switching on/off by a magnetic valve
  • Nabertherm Controller to regulate the temperature curve and switch the gas supply system
  • Additional safety controls with touch panel to monitor hydrogen gassing only above 750  °C
  • Exhaust gas torch with temperature monitoring
  • Over-temperature limiter with digital display as over-temperature protection for the furnace and charge
  • Temperature monitoring at the gas inlet
  • Emergency purge container for nitrogen

Additional Equipment

  • Additional gas panels for further non-flammable gases
  • Gassing via program-related controllable mass flow controllers
  • Bottle pressure reducer for use with bottled gas
  • Air-water heat exchanger for closed loop water circuit (not for RSRB and RSRC)
 

Rotary tube furnace RSRC 120/1000/11 H2 with three-zone control, charge control as well as FeCrAl working tube, feeding system and gas supply system 4 for hydrogen operation

Example of a torch

Gas Supply System 4 for Hydrogen Applications in Tube Furnaces from Room Temperature

Gas supply system 4 allows operation with a hydrogen atmosphere starting at ambient temperature. During hydrogen operation, a pressure of approx. 30 mbar is ensured in the working tube. At the gas outlet the hydrogen is burnt off in an exhaust gas torch. 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 (with at least five times the volume of the tube). If a malfunction occurs, the tube is immediately purged with nitrogen and the system is automatically switched to a safe status.

Standard Equipment

  • Available for R, RHTC, RHTH, RHTV, RSH, RSV, RSRB and RSRC tube furnaces
  • Gas panel for hydrogen and nitrogen
  • Automatic segment-related switching on/off by a magnetic valve
  • Control via safety PLC control system with touch panel
  • Exhaust gas torch with temperature monitoring
  • Over-temperature limiter with digital display as over-temperature protection for the furnace and charge
  • Excess pressure monitoring
  • Emergency purge container for nitrogen

Additional Equipment

  • Additional gas panels for further non-flammable gases
  • Operation with other flammable gases
  • Gassing via program-related controllable mass flow controllers
  • Bottle pressure reducer for use with bottled gas
  • Air-water heat exchanger for closed loop water circuit (apart from RSRB and RSRC)
ModelGas supply system
 1152252634
RD      
R  
RT      
RHTC   
RHTH    
RHTV    
RSH  
RSV  
RSRB    
RSRC    
 

Furnace-unrelated measuring device for a pressure range of 10−3 mbar or 10−9 mbar

Single-stage rotary vane pump

Two-stage rotary vane pump

Turbomolecular pump with upstream pump

Vacuum Package

The vacuum package enables the working tube to be evacuated for vacuum operation in tube furnaces. It consists of an intermediate component for the gas outlet, a ball valve, a pressure gauge and a manually operated vacuum pump that is connected to the gas outlet by a corrugated stainless steel hose. A gas-tight furnace system is required for the use of a vacuum package, e.g. with the gas-supply packages 15, 2, 25 or 26. To protect the vacuum pump, only cold stage evacuation is allowed. The pump can then remain switched during the running program. The maximum ultimate pressure in the working tube depends on the type of pump.

  • Single-stage rotary vane pump for an achievable ultimate pressure of approx. 20 mbar
  • Two-stage rotary vane pump for an achievable ultimate pressure of approx. 5 x 10−2 mbar
  • Turbomolecular pump system, consisting of a diaphragm pump with downstream turbomolecular pump for an achievable ultimate pressure of up to approx. 5 x 10−5 mbar (not for models RSRB and RSRC and not in combination with gas supply package 15)
 

Controls for Tube Furnaces

Furnace control

Charge control

Three-Zone Furnace Chamber Control

Furnace Chamber and Charge Controls

With the furnace chamber control, the temperature is only measured in the furnace chamber outside the working tube. This protects the thermocouples from damage and aggressive batch. The control is slow to avoid overshoots. Since the temperature inside the working tube is not measured in this mode, a significant temperature difference can occur between the batch temperature inside the tube and the furnace chamber temperature displayed in the controller. With an additional charge thermocouple, the "charge control" mode can measure the temperature in the furnace as well as the temperature inside the working tube. This enables the batch temperature to be controlled very precisely and quickly. Charge control can be used with all tube furnaces, with the exception of the RD and RT series.

Three-Zone Furnace Chamber Controls

The heated length is divided into three heating zones. The temperature is measured via one thermocouple per zone, which is positioned outside the working tube between the heating wires. The side zones are controlled via a setpoint offset in relation to the middle zone. In this way, the heat loss at the tube ends can be compensated in order to achieve an extended zone of constant temperature (+/− 5 K).

Freely Radiating Heating Elements

A very good temperature uniformity is achieved with the freely radiating heating elements on support tubes.