Nabertherm Tube Furnaces and Accessories

 

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 fibre plugs, these furnaces have an unbeatable price/performance ratio.

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

• Tmax 1200 °C or 1300 °C
• Casing made of textured stainless steel sheets (non-rusting design)
• Outer tube diameter of 50 to 120 mm, heated length from 250 to 1000 mm
• Working tube of C 530 ceramic including two fibre plugs as standard equipment
• Long lasting type S thermocouple
• Silent solid-state power control relays
• Standard working tube

Additional Equipment

• Over-temperature limit controller with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the oven and load
• Cascade controller for temperature measurement in the working tube and behind the tube
• Working tubes designed for process requirements
• Three-zoned design with HiProSystem control (heated length from 750 mm, for 1300 °C models)
• Alternative working tubes

 

Model	Tmax	Outer dimensions in mm			Outer tube Ø	Heated	Length constant	Tube length	Power	Electrical	Weight
	°C	W	D	H	/mm	length mm	temperature ?T 10K	in mm	kW	connection*	in kg
R 50/250/12	1200	400	240	490	50	250	80	450	1,2	single-phase	20
R 50/500/12	1200	650	240	490	50	500	170	700	1,8	single-phase	25
R 100/750/12	1200	1000	360	640	90	750	250	1070	3,6	single-phase	80
R 120/1000/12	1200	1300	420	730	120	1000	330	1400	6,0	3-phase	170
R 50/250/13	1300	400	240	490	50	250	80	450	1,3	single-phase	35
R 50/500/13	1300	650	240	490	50	500	170	700	1,8	single-phase	48
R 100/750/131	1300	1000	360	640	90	750	250	1070	4,4	3-phase	120
R 120/1000/131	1300	1300	420	730	120	1000	330	1400	6,5	3-phase	230
1These models also available with 3 zones *

 

Universal Tube Furnaces RT with Stand for horizontal or vertical Operation

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.

RT 50-250/11 - RT 30-200/15

• 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
• Long lasting type S thermocouple
• Operation also possible separate from stand if safety guidelines are observed
• Control system built into furnace base

 

Model	Tmax	Outer dimensions in mm			Outer tube Ø	Heated	Length constant	Tube length	Power	Electrical	Weight
	°C	W	D	H	/mm	length mm	temperature ?T 10K	in mm	kW	connection*	in kg
RT 50-250/11	1100	350	380	740	50	250	80	360	1,8	single-phase	25
RT 50-250/13	1300	350	380	740	50	250	80	360	1,8	single-phase	25
RT 30-200/15	1500	445	475	740	30	200	70	360	1,8	single-phase	45

 

Hinged Tube Furnaces RS for horizontal or vertical Operation up to 1300 °C, Gas Atmosphere or Vacuum

The RS tube furnaces can be used for either horizontal or vertical operation. Using a variety of accessories, these professional tube furnaces can be optimally laid out for your process. By using different available gas supply packages, operations can be performed under a protective gas atmosphere, vacuum, or even with flammable gasses.

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

• Tmax 1100 °C or 1300 °C
• Casing made of sheets of textured stainless steel (non-rusting design)
• Tmax 1100 °C: Type K thermocouple
• Tmax 1300 °C: Wear-free type S thermocouple
• Available in horizontal or vertical designs
• 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
• Switching and control unit separate from furnace in own wall or standing cabinet
• Standard working tube

The RS tube furnace line can be custom-fit to your needs with a variety of extras. Starting with various working tubes of different materials to protective gas or vacuum operation. For optimum temperature distribution, all RS furnaces are also available as three-zone tube furnaces with modern PLC controls. The heat loss at the ends of the tube is compensated using this three-zoned control, and a longer uniform zone is the result.

Additional Equipment

• Cascade controller with temperature measurement in the working tube and in the oven chamber behind the tube
• Working tubes designed for process requirements
• Different gas supply packages (starting on page 24) for protective gas and vacuum operation
• 3-zone control for optimization of temperature distribution
• Burst protector for heating elements and/or as support surface for the load
• Stand for vertical operation
• Alternative working tubes see chart on page 27

 

Model	Tmax	Exterior dimensions3 in mm			Outer tube Ø	Heated	Length constant	Tube length	Power	Electrical	Weight
	°C	W2	D	H	/mm	length mm	temperature ?T 10K	in mm	kW	connection*	in kg
RS 80/300/11	1100	555	475	390	80	300	100	650	1,6	single-phase	80
RS 80/500/11	1100	755	475	390	80	500	170	850	3,4	single-phase	90
RS 80/750/11	1100	1005	475	390	80	750	250	1100	4,6	3-phase1	105
RS 120/500/11	1100	755	525	440	120	500	170	850	4,8	3-phase1	95
RS 120/750/11	1100	1005	525	440	120	750	250	1100	6,3	3-phase	110
RS 120/1000/11	1100	1255	525	440	120	1000	330	1350	9,0	3-phase	125
RS 170/750/11	1100	1005	575	490	170	750	250	1100	11,5	3-phase	115
RS 170/1000/11	1100	1255	575	490	170	1000	330	1350	11,5	3-phase	130
RS 80/300/13	1300	555	475	390	80	300	100	650	3,6	single-phase	80
RS 80/500/13	1300	755	475	390	80	500	170	850	6,0	3-phase	90
RS 80/750/13	1300	1005	475	390	80	750	250	1100	9,3	3-phase	105
RS 120/500/13	1300	755	525	440	120	500	170	850	7,8	3-phase	95
RS 120/750/13	1300	1005	525	440	120	750	250	1100	12,6	3-phase	110
RS 120/1000/13	1300	1255	525	440	120	1000	330	1350	12,6	3-phase	125
RS 170/750/13	1300	1005	575	490	170	750	250	1100	12,6	3-phase	115
RS 170/1000/13	1300	1255	575	490	170	1000	330	1350	12,6	3-phase	130
1Only heating between two phases 3Exterior dimensions for vertical operation upon request 2Without tube *Please see page 44 for more information about mains voltage

 

Rotary Tube Furnaces RSR

When the retention of the granular characteristics of the material is important, e.g. when drying or calcining, this rotary tube furnace is the optimum solution. The continuous rotary operation of the furnace tube and the option of operating it under protective gas lead to excellent results.

RSR 80-500/11 - RSR 120-750/11

• Design like RS models, see page 18
• Tmax 1100 °C
• Type K thermocouple
• Compact unit, designed as tabletop model
• Optionally supplied with quartz glass process reactor or quartz glass tube
• Easy working tube or process reactor removal through belt-less drive and hinged casing
• Infinitely variable drive (approx. 1-20 rpm)
• Good flooding of load with process gas due to inlet on one side and outlet on other side of tube
• For a description of various controllers, see page 44

Additional Equipment

• Gas-tight rotary feedthrough for connection to gas supply systems (suitable for operation in rough vacuum) upon request
• Tilting device
• Gas supply systems with gas cooler at the outlet
• Three-zone control

Model	Tmax	Outer dimensions in mm			Length constant	Tube dimensions in mm				Supply	Electrical	Weight
	°C	W2	D	H	Temperature ?T 10K	L	I	D	d	power/kW	connection*	in kg
RSR 80-500/11	1100	1075	475	390	170	1140	500	76	34	3,4	single-phase	100
RSR 80-750/11	1100	1325	475	390	250	1390	750	76	34	4,6	3-phase1	115
RSR 120-500/11	1100	1075	525	440	170	1140	500	106	34	4,8	3-phase1	105
RSR 120-750/11	1100	1325	525	440	250	1390	750	106	34	6,3	3-phase	120
1Only heating between two phases *Please see page 44 for information on mains voltage 2Without tube

 

Universal High-Temperature Tube Furnaces RHTC with Silicon Carbide Rod Heating, Gas Atmosphere or Vacuum

These compact tube furnaces with SiC rod heating and integrated control systems 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 distribution. The price-performance ratio for this temperature range is unbeatable.

RHTC 80-230 - RHTC 80-710

• Tmax 1500 °C
• Textured stainless steel sheet casing (non-rusting)
• High-quality fiber insulation
• Active cooling of casing for low surface temperatures
• Type S thermocouple with no wear & tear
• Silent semiconductor relay
• Prepared for assembly of working tubes with water-cooled flanges
• Ceramic tube, C 799 quality
• Standard working tube see chart on page 27
• For a description of various controllers, see page 44

Additional Equipment

• Over-temperature limit controller with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect furnace and load
• Fiber plugs
• Working tubes for operation with water-cooled flanges
• Gas panel for non-combustible gases
• Alternative working tubes see chart on page 27
• Controlled switch-on/switch-off of gas supply (for controller P 320 only)

 

Model	Tmax	Outer dimensions in mm			Outer tube Ø	Heated	Length constant	Tube length	Supply	Electrical	Weight
	°C	W	D	H	/mm	length/mm	temperature ?T 10K	in mm	power/kW	connection*	in kg
RHTC 80-230	1500	600	430	580	80	230	75	480	6,3	3-phase2	50
RHTC 80-450	1500	820	430	580	80	450	150	630	9,5	3-phase1	70
RHTC 80-710	1500	1070	430	580	80	710	235	1070	11,7	3-phase1	90
1Only heating between 2 phases *See page 44 for information on supply voltage 2Only heating on one phase (asymmetrical load)

 

High-temperature Tube Furnaces RHTH for horizontal Operation and RHTV for vertical Operation up to 1800 °C, Gas Atmosphere or Vacuum

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 fibre 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 a protective gas atmosphere, vacuum, or even with flammable gasses.

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

• Tmax 1600 °C, 1700 °C, or 1800 °C
• MoSi2 heating elements, mounted vertically for easy replacement
• Insulation with vacuum-formed ceramic fibre plates
• Rectangular outer casing with slots for convection cooling
• Casing made of sheets of textured stainless steel (non-rusting design)
• Ceramic working tube including fibre plugs for operation in air, included in delivery
• Type B thermocouple
• Power unit with low-voltage transformer and thyristor controller
• Switching and control unit separate from furnace in own wall or standing cabinet
• Please see page 44 for a description of various controllers

Additional Equipment

• Over-temperature limit controller with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the oven and load
• Cascade controller with temperature measurement in the working tube and in the oven chamber behind the tube
• Working tubes designed for process requirements
• Gas-tight flanges for protective gas and vacuum operation
• Manual or automatic gas supply system
• 3-zone control for optimization of temperature distribution
• Stand for vertical operation
• Please see page 24 for more optional equipment

 

Model	Tmax	Outer dimensions in mm			Outer tube Ø	Heated	Length constant	Tube length	Power	Electrical	Weight
Horizontal design	°C	W	D	H	/mm	length mm	temperature ?T 10K	in mm	kW	connection*	in kg
RHTH 120/150/..	1600 or	470	550	640	120	150	50	470	5,4	3-phase1	70
RHTH 120/300/..	1700 or	620	550	640	120	300	100	620	7,2	3-phase1	90
RHTH 120/600/..	1800	920	550	640	120	600	200	920	10,8	3-phase1	110

Model	Tmax	Outer dimensions in mm			Outer tube Ø	Heated	Length constant	Tube length	Power	Electrical	Weight
Vertical design	°C	W	D	H2	/mm	length mm	temperature ?T 10K	in mm	kW	connection*	in kg
RHTV 120/150/..	1600 or	580	580	480	120	150	30	480	4,1	3-phase1	70
RHTV 120/300/..	1700 or	580	580	630	120	300	80	630	7,1	3-phase1	90
RHTV 120/600/..	1800	580	580	880	120	600	170	880	12,6	3-phase1	110
1Only heating between two phases *Please see page 44 for information on mains voltage 2Without tube

 

Gas Supply Systems/Vacuum Operation for Tube Furnaces RS, RHTC, RHTH and RHTV

When equipped with various equipment packages, the tube furnace series RS, RHTH, and RHTV can be adapted for operation with non-flammable or flammable gasses or for vacuum operation. The different equipment packages can be delivered together with the furnace, or later as needed.

Gas Supply System 1 for simple protective gas applications (no vacuum operation)

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

Gas Supply System 2 for gas-tight operation with non-flammable gasses/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.

• Working tube of ceramic C 530 can be used
• 2 plugs of ceramic fibre with protective gas connections
• Gas supply system for non-flammable 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 non-flammable type of gas
• Bottle pressure regulator for use with bottled gas
• Automatically controlled gas supply with solenoid valves on the gas supply panel, which can be switched on and off through a controller with programmable extra functions (e.g. P 320)

• 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 non-flammable 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 non-flammable type of gas
• Bottle pressure regulator for use with bottled gas
• Automatically controlled gas supply with solenoid valves on the gas supply panel, which can be switched on and off through a controller with programmable extra functions (e.g. P 320)
• Water-cooled end flange with quick connectors
• Cooling unit for closed loop water circuit

Vacuum Operation

• Vacuum package for evacuation of the working tube, consisting of a tee for the gas outlet, 2 ball valves, manometer, 1-stage manually operated rotary vane vacuum pump with corrugated stainless steel hose connected to the gas outlet, max. attainable end pressure in working tube about 10-3 mbar
• Alternative pumps for max. final pressure of up to 10-5 mbar on request (see page 25)

Adding gas supply system 3 to the tube furnace allows operation under a hydrogen atmosphere. The built-in safety system allows the introduction of hydrogen into the working tube, when heated to at least 800 °C. The furnace and control system are designed to provide the highest possible degree of safety for the furnace, operator, and surroundings.

Adding gas supply system 4 to the tube furnace allows operation under a hydrogen atmosphere. The built-in safety system allows the introduction of hydrogen into the working tube at room temperature. The furnace and control system are designed to provide the highest possible degree of safety for the furnace, operator, and surroundings.

• Longer, gas-tight working tube of ceramic C 630 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 with cooling water supply (to be provided by the customer) and NW9 hose connector
• Mounting system on furnace for the flanges
• Safety system for gassing with flammable protective gases starting at 800 °C
• Exhaust gas torch, propane-powered for customer-installed propane gas supply at 30 mbar
• Gas supply system for H2 and N2. The customer provides an H2 supply at 300 mbar and a N2 supply at 10 bar
• N2 emergency purge container
• PLC-controlled regulation with operation via HiProSystem touchscreen, locking procedures, and safety matrix programmed into the software

Additional Equipment

• Extension of gas supply system with a second or third nonflammable type of gas
• Bottle pressure regulator for use with bottled gas
• Cooling unit for closed loop water circuit

Vacuum Operation

• Vacuum package for pre-evacuation of the working tube, consisting of a tee for the gas outlet, 2 ball valves, manometer, 1-stage manually operated rotary vane vacuum pump with corrugated stainless steel hose connected to the gas outlet, max. attainable end pressure in working tube about 10-3 mbar
• Vacuum package with adapted pumps for a max. end pressure down to 10-5 mbar upon request (see below)

• Equipment as for gassing package 3, but with extended safety system for operation with hydrogen at room temperature.

 

Vacuum Pumps

With respect to the final pressure different pumps are available (see also page 40):

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 (see page 26).

• 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.
• Pump system PT70 Dry (rotary vane pump with following turbomolecular pump for a max. final pressure of 10-5 mbar

 

Furnace Chamber Control

with temperature measurement of load in the working tube.

Charge Control

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

Cascade Control

Only the furnace chamber temperature is measured and controlled. Regulation is carried out slowly to avoid out-of-range values. Because the charge temperature is not measured during this process, the furnace chamber temperature deviates from the charge temperature by several degrees.

Furnace Chamber vs. Cascade Controller Comparison

If the cascade 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.

Furnace Chamber Control

• 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

• Advantages: Precise control inside of tube without temperature deviation
• Disadvantages: Slow control with danger of temperature overshoot, control parameters must eventually be adjusted to correspond to the process. At high application temperatures, the over-temperature limit controller can activate to protect the heating elements.

• Advantages: Very precise and rapid control adjustment
• Disadvantage: Costs (only available for models with external switchgear panel)

 

Working Tubes

There are various working tubes available, depending on application and temperatures. The technical characteristics of the different working tubes are presented in the following table:

Material	Tmax in air?°C	Tmax in vacuum operation?°C	Gas-tight
C 530 (Sillimantin)	1300	not possible	no
C 610 (Pytagoras)	1400	1200	yes
C 799 (99.7 % Al2O3)	1800	1400	yes
Quartz glass	1100	950	yes
CrFeAl-Alloy	1300	1100

Nabertherm Ovens and High-Temperature Ovens, Air Circulation Furnaces

TR 1050 with double door

 

Usable to a maximum of 300 °C, these ovens offer optimum temperature uniformity over their entire useable volume. Horizontal air circulation ensures high drying power and a fast heating time. Maximum temperature uniformity is achieved even for closely packed charges. Multiple tray supports enable loading on multiple layers.

TR 60 - TR 1050

• Tmax 300 °C
• Compact design as tabletop model (TR 420 and TR 1050 as free standing model)
• Horizontal air circulation for temperature uniformity better than ?T 8K in the usable space
• Stacking in multiple layers possible using removable trays
• Furnace chamber of stainless steel, material 1.4301 (304)
• Double door for model TR 1050
• View window upon request
• Please see page 44 for a description of various controllers

 

Model	Tmax	Inner dimensions in mm			Volume	Outer dimensions in mm			Power	Electrical	Weight	Trays in-	Trays	Max.
	°C	w	d	h	in L	W	D	H	kW	connection*	in kg	cluded	max.	total load1
TR 60	300	490	360	340	60	650	550	640	2,1	single-phase	45	1	4	120
TR 120	300	600	360	480	105	750	550	780	2,1	single-phase	70	2	7	150
TR 240	300	700	550	640	240	860	730	940	3,1	single-phase	100	2	9	150
TR 420	300	710	550	1080	420	860	830	1370	4,0	3-phase	120	3	17	150
TR 1050	300	1240	570	1510	1050	1430	860	1920	9,0	3-phase	380	4	22	170
1Max load per layer 30 kg *Please see page 44 for information on mains voltage

 

High-Temperature Ovens, Air Circulation Furnaces up to 850 °C

If very good temperature uniformity is necessary for your heat treatment, our air circulation furnaces with horizontal air circulation are the right solution for you. Due to their solid industrial design, they can be used for many processes, like ageing, preheating, drying, hardening, tempering and annealing.

N 15/65HA, N 30/45HA - N 500/85HA

• Tmax 450 °C, 650 °C, or 850 °C
• Furnace plenum made of stainless steel (N 15/65HA without plenum)
• Model with 15 litres designed as tabletop model, other models freestanding with stand
• Solid industrial design
• Optimum temperature distribution per DIN 17052-1 to ?T 6K in useable space
• Loading of multiple layers possible using removable trays. For models N 30/.. - N 560/.. one tray is included in scope of delivery
• Please see page 44 for a description of various controllers

 Nabertherm Melting Furnaces

VHT 8/22-GR with graphite heating

Graphite heating chamber

 

The compact furnaces of the VHT line are available as electrically heated chamber furnaces with graphite, molybdenum or MoSi2 heating. A wide variety of heating designs as well as a complete range of accessories allow optimal furnace configuration for technically demanding customer processes. The vacuum-tight retort enables heat treatment processes either in protective and reaction gas atmospheres or in a vacuum, depending on the application, all the way to 10-5 mbar. With the appropriate safety technology, the furnaces are also suitable for operation with hydrogen.

Heating Concepts

Graphite – VHT ../GR

• Suitable for processes under protective and reaction gases or under vacuum
• Tmax 1800 °C and 2200 °C
• Graphite felt insulation
• Temperature measurement using type B thermocouple (version to 1800 °C)
• Temperature measurement using optical pyrometer (version to 2200 °C)

Molybdenum – VHT ../MO

• Suitable for processes under highly pure protective and reaction gases or under a high vacuum up as much as 10-5 mbar
• Tmax 1600°C
• Insulation made of Molybdenum steel sheets

MoSi2 – VHT ../KE

• Suitable for processes under protective and reaction gases, under vacuum or in air
• Tmax 1800°C
• Insulation made of high purity aluminium oxide fiber

Basic Version VHT (All Heating Concepts)

• Standard furnace sizes 8, 40 and 100 liters
• A water-cooled stainless steel process reactor sealed with temperature-resistant o-rings
• Frame made of stable steel profiles, powder-coated and easy to service due to removable stainless steel panels
• Casing of the VHT 8 model on castors for easy repositioning of furnace
• Cooling water manifold with manual stopcocks in supply and return lines, automatic flowmeter monitoring, open-loop cooling water system
• Adjustable cooling water circuits with flowmeter and temperature indicator and overtemperature fuses
• Switching system integrated within casing to save space
• H 700 PLC control with clearly laid out 5.7“ touchpanel control for program entry and display, 10 programs each with 20 segments
• Over-temperature limit controller with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2
• Manual operation of the process gas and vacuum functions
• Manual gas supply for one process gas (N2 or Ar) with adjustable flow
• Bypass with manual valve for rapid filling or flooding of furnace chamber
• Manual gas outlet with overflow valve (20 mbar)
• Single-stage rotary vane pump with ball valve for pre-evacuating and heat treatment in a rough vacuum to 20 mbar
• Pressure gauge for visual pressure monitoring

Additional Equipment

• Optionally separable frame for passing through narrow door openings
• Manual gas supply for second process gas (N2 or Ar) with adjustable flow and bypass
• Molybdenum or carbon-fiber-carbon retort with direct gas supply for clean atmosphere and improved temperature distribution in the furnace chamber
• Charge thermocouple with display
• Two-stage rotary vane pump with ball valve for pre-evacuating and heat-treating in a vacuum to 10-2 mbar
• Cooling unit with closed-loop cooling water circuit

The use of automatic valves for process gas or exhaust air management and the powerful H3700 controller allow the entire heat treatment process to be run fully automatically. The entry of all process data (temperatures, ramps, gas supply and vacuum) is easily controllable from a large, 12" graphic control panel. System status with all process-related data are clearly shown on a process control diagram. All valves and the vacuum pump can also be operated manually from here as well. The system has an automatic pre-program and post-program for purging the furnace chamber and also features automated leak testing.

Automatic Version VHT without Hydrogen Operation

• Features the same as basic version of VHT, plus:
• Automatic gas supply for one process gas (N2 or Ar) with adjustable flow
• Bypass for rapid filling or flooding of furnace chamber
• Automatic gas outlet with check valve and pressure relief valve (20 mbar)
• Single-stage rotary vane pump with check valve for pre-evacuating and heat treatment in a rough vacuum to 20 mbar
• Transducer for absolute and relative pressure measurements
• H3700 controller (10 programs with 20 segments each)
• Operation with 12“ graphical control panel (touchpanel)

Additional Equipment

• Mass flow controller for varying flow volumes and generating gas mixtures (with second process gas)
• Furnace pressure control with position-controlled exhaust valve (partial pressure control)
• Electric or gas-heated exhaust gas torch for process gas post-combustion
• Water-cooled exhaust gas cooler
• Condensate traps for separation of large amounts of binder
• Two-stage rotary vane pump with check valve for pre-evacuating and heat treatment in a vacuum to 10-2 mbar
• Pump stand with turbo-molecular pump and slide valve for pre-evacuating and for heat treatment in a vacuum to 10-5 mbar (only for molybdenum model) including electric pressure transducer and booster pump
• PC control via NCC with enhanced optional documentation and possible connection to customer LAN

Extension Package – Hydrogen in VHT-MO

When hydrogen is used as a process gas, our systems come equipped with additional safety technology. Only certified and industry proven safety sensors are used. The furnaces are always controlled using a fail-safe controller (S7-300F/safety controller). The controller and documentation are carried out using Nabertherm Control Center NCC (see page 45).

Two Temperature-Dependent Concepts Available for Safe Operation with Hydrogen:

• Partial pressure operation: H2 infeed under controlled negative pressure (partial pressure) in the process reactor starting from 750 °C furnace chamber temperature
• Atmospheric operation: H2 overpressure infeed in process reactor starting from room temperature

Automatic Version VHT for Operation with Hydrogen

• Features as found with automatic version of the VHT without hydrogen operation, plus
• Redundant process gas valves for hydrogen
• Monitored pre-pressures of all process gases
• Bypass for safe flushing of furnace chamber with inert gas
• Pressure-monitored emergency flooding with automated solenoid valve opening
• Electric or gas-heated exhaust gas torch for H2 post-combustion

Extension Package – Debinding and Sintering

The "Debinding and Sintering" extension package allows VHT furnaces with molybdenum heating to be used for processes causing process-related contamination during heat treatment. The furnace is equipped with an additional retort with direct gas inlet and outlet and exhaust gas torch. Special gas plumbing prevents contamination of the furnace insulation and the heater due to the thermal process. The furnace can also optionally be equipped with a heated gas exhaust, a partial pressure debinding system, and a binding agent trap. The control system corresponds to that of the "Automatic" extension package.

Automatic Version VHT-MO for Debinding/Sintering

• Features such as the automatic version of the VHT without hydrogen, plus:
• Additional molybdenum retorts in the furnace chamber with direct gas inlet and outlet for protecting the furnace insulation
• Exhaust gas torch for post-combustion of gases produced by process
• Exhaust gas cooler

Additional Equipment

• Heated gas outlet
• Binding agent trap with condensate separation for processes with a large proportion of binding agents
• Cooling unit for closed-loop water circuit

	VHT ...-18/GR	VHT ...-16/MO	VHT ...-18/KE
Inert gas	v	v	v
Air	to 500 °C	-	v
Hydrogen	v	v	-
Rough vacuum and fine vacuum (>10-3 mbar)	v	v	v
High vacuum (<10-3 mbar)	-	v	-

Model	Tmax	Inner dimensions in mm			Volume	Outer dimensions in mm			Supply	Electrical	Weight	Material heater/
	°C	W	D	H	in l	W	D	H	power/kW	connection*	in kg	insulation
VHT 8/18-GR	1800	170	240	200	8	1250 (800)1	1100	2000	25	three-phase	1200	Graphite/graphite felt
VHT 40/18-GR	1800	300	450	300	40	1500	2000	2300	80	three-phase	2000	Graphite/graphite felt
VHT 100/18-GR	1800	450	550	450	100	1750	2200	2600	160	three-phase	2800	Graphite/graphite felt
VHT 8/22-GR	2200	170	240	200	8	1250 (800)1	1100	2000	25	three-phase	1200	Graphite/graphite felt
VHT 40/22-GR	2200	300	450	300	40	1500	2000	2300	80	three-phase	2000	Graphite/graphite felt
VHT 100/22-GR	2200	450	550	450	100	1750	2200	2600	160	three-phase	2800	Graphite/graphite felt
VHT 8/16-MO	1600	170	240	200	8	1250 (800)1	1100	2000	30	three-phase	1200	Molybdenum
VHT 40/16-MO	1600	300	450	300	40	1500	2000	2300	110	three-phase	2000	Molybdenum
VHT 100/16-MO	1600	450	550	450	100	1750	2200	2600	210	three-phase	2800	Molybdenum
VHT 8/18-KE	1800	170	240	200	8	1250 (800)1	1100	2000	15	three-phase	1200	MoSi2/ceramic fiber
VHT 40/18-KE	1800	300	450	300	40	1500	2000	2300	45	three-phase	2000	MoSi2/ceramic fiber
VHT 100/18-KE	1800	450	550	450	100	1750	2200	2600	95	three-phase	2800	MoSi2/ceramic fiber
1With the switching system unit removed *See page 44 for information about supply voltage.

 

Nabertherm High-Temperature Vacuum Furnaces

VHT 8/22-GR with graphite heating

Graphite heating chamber

 

The compact furnaces of the VHT line are available as electrically heated chamber furnaces with graphite, molybdenum or MoSi2 heating. A wide variety of heating designs as well as a complete range of accessories allow optimal furnace configuration for technically demanding customer processes. The vacuum-tight retort enables heat treatment processes either in protective and reaction gas atmospheres or in a vacuum, depending on the application, all the way to 10-5 mbar. With the appropriate safety technology, the furnaces are also suitable for operation with hydrogen.

Heating Concepts

Graphite – VHT ../GR

• Suitable for processes under protective and reaction gases or under vacuum
• Tmax 1800 °C and 2200 °C
• Graphite felt insulation
• Temperature measurement using type B thermocouple (version to 1800 °C)
• Temperature measurement using optical pyrometer (version to 2200 °C)

Molybdenum – VHT ../MO

• Suitable for processes under highly pure protective and reaction gases or under a high vacuum up as much as 10-5 mbar
• Tmax 1600°C
• Insulation made of Molybdenum steel sheets

MoSi2 – VHT ../KE

• Suitable for processes under protective and reaction gases, under vacuum or in air
• Tmax 1800°C
• Insulation made of high purity aluminium oxide fibre

Basic Version VHT (All Heating Concepts)

• Standard furnace sizes 8, 40 and 100 litres
• A water-cooled stainless steel process reactor sealed with temperature-resistant o-rings
• Frame made of stable steel profiles, powder-coated and easy to service due to removable stainless steel panels
• Casing of the VHT 8 model on castors for easy repositioning of furnace
• Cooling water manifold with manual stopcocks in supply and return lines, automatic flowmeter monitoring, open-loop cooling water system
• Adjustable cooling water circuits with flowmeter and temperature indicator and overtemperature fuses
• Switching system integrated within casing to save space
• H 700 PLC control with clearly laid out 5.7“ touchpanel control for program entry and display, 10 programs each with 20 segments
• Over-temperature limit controller with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2
• Manual operation of the process gas and vacuum functions
• Manual gas supply for one process gas (N2 or Ar) with adjustable flow
• Bypass with manual valve for rapid filling or flooding of furnace chamber
• Manual gas outlet with overflow valve (20 mbar)
• Single-stage rotary vane pump with ball valve for pre-evacuating and heat treatment in a rough vacuum to 20 mbar
• Pressure gauge for visual pressure monitoring

Additional Equipment

• Optionally separable frame for passing through narrow door openings
• Manual gas supply for second process gas (N2 or Ar) with adjustable flow and bypass
• Molybdenum or carbon-fibre-carbon retort with direct gas supply for clean atmosphere and improved temperature distribution in the furnace chamber
• Charge thermocouple with display
• Two-stage rotary vane pump with ball valve for pre-evacuating and heat-treating in a vacuum to 10-2 mbar
• Cooling unit with closed-loop cooling water circuit

The use of automatic valves for process gas or exhaust air management and the powerful H3700 controller allow the entire heat treatment process to be run fully automatically. The entry of all process data (temperatures, ramps, gas supply and vacuum) is easily controllable from a large, 12" graphic control panel. System status with all process-related data are clearly shown on a process control diagram. All valves and the vacuum pump can also be operated manually from here as well. The system has an automatic pre-program and post-program for purging the furnace chamber and also features automated leak testing.

Automatic Version VHT without Hydrogen Operation

• Features the same as basic version of VHT, plus:
• Automatic gas supply for one process gas (N2 or Ar) with adjustable flow
• Bypass for rapid filling or flooding of furnace chamber
• Automatic gas outlet with check valve and pressure relief valve (20 mbar)
• Single-stage rotary vane pump with check valve for pre-evacuating and heat treatment in a rough vacuum to 20 mbar
• Transducer for absolute and relative pressure measurements
• H3700 controller (10 programs with 20 segments each)
• Operation with 12“ graphical control panel (touchpanel)

Additional Equipment

• Mass flow controller for varying flow volumes and generating gas mixtures (with second process gas)
• Furnace pressure control with position-controlled exhaust valve (partial pressure control)
• Electric or gas-heated exhaust gas torch for process gas post-combustion
• Water-cooled exhaust gas cooler
• Condensate traps for separation of large amounts of binder
• Two-stage rotary vane pump with check valve for pre-evacuating and heat treatment in a vacuum to 10-2 mbar
• Pump stand with turbo-molecular pump and slide valve for pre-evacuating and for heat treatment in a vacuum to 10-5 mbar (only for molybdenum model) including electric pressure transducer and booster pump
• PC control via NCC with enhanced optional documentation and possible connection to customer LAN

Extension Package – Hydrogen in VHT-MO

When hydrogen is used as a process gas, our systems come equipped with additional safety technology. Only certified and industry proven safety sensors are used. The furnaces are always controlled using a fail-safe controller (S7-300F/safety controller). The controller and documentation are carried out using Nabertherm Control Center NCC (see page 45).

Two Temperature-Dependent Concepts Available for Safe Operation with Hydrogen:

• Partial pressure operation: H2 infeed under controlled negative pressure (partial pressure) in the process reactor starting from 750 °C furnace chamber temperature
• Atmospheric operation: H2 overpressure infeed in process reactor starting from room temperature

Automatic Version VHT for Operation with Hydrogen

• Features as found with automatic version of the VHT without hydrogen operation, plus
• Redundant process gas valves for hydrogen
• Monitored pre-pressures of all process gases
• Bypass for safe flushing of furnace chamber with inert gas
• Pressure-monitored emergency flooding with automated solenoid valve opening
• Electric or gas-heated exhaust gas torch for H2 post-combustion

Extension Package – Debinding and Sintering

The "Debinding and Sintering" extension package allows VHT furnaces with molybdenum heating to be used for processes causing process-related contamination during heat treatment. The furnace is equipped with an additional retort with direct gas inlet and outlet and exhaust gas torch. Special gas plumbing prevents contamination of the furnace insulation and the heater due to the thermal process. The furnace can also optionally be equipped with a heated gas exhaust, a partial pressure debinding system, and a binding agent trap. The control system corresponds to that of the "Automatic" extension package.

Automatic Version VHT-MO for Debinding/Sintering

• Features such as the automatic version of the VHT without hydrogen, plus:
• Additional molybdenum retorts in the furnace chamber with direct gas inlet and outlet for protecting the furnace insulation
• Exhaust gas torch for post-combustion of gases produced by process
• Exhaust gas cooler

Additional Equipment

• Heated gas outlet
• Binding agent trap with condensate separation for processes with a large proportion of binding agents
• Cooling unit for closed-loop water circuit

	VHT ...-18/GR	VHT ...-16/MO	VHT ...-18/KE
Inert gas	v	v	v
Air	to 500 °C	-	v
Hydrogen	v	v	-
Rough vacuum and fine vacuum (>10-3 mbar)	v	v	v
High vacuum (<10-3 mbar)	-	v	-

Model	Tmax	Inner dimensions in mm			Volume	Outer dimensions in mm			Supply	Electrical	Weight	Material heater/
	°C	W	D	H	in l	W	D	H	power/kW	connection*	in kg	insulation
VHT 8/18-GR	1800	170	240	200	8	1250 (800)1	1100	2000	25	three-phase	1200	Graphite/graphite felt
VHT 40/18-GR	1800	300	450	300	40	1500	2000	2300	80	three-phase	2000	Graphite/graphite felt
VHT 100/18-GR	1800	450	550	450	100	1750	2200	2600	160	three-phase	2800	Graphite/graphite felt
VHT 8/22-GR	2200	170	240	200	8	1250 (800)1	1100	2000	25	three-phase	1200	Graphite/graphite felt
VHT 40/22-GR	2200	300	450	300	40	1500	2000	2300	80	three-phase	2000	Graphite/graphite felt
VHT 100/22-GR	2200	450	550	450	100	1750	2200	2600	160	three-phase	2800	Graphite/graphite felt
VHT 8/16-MO	1600	170	240	200	8	1250 (800)1	1100	2000	30	three-phase	1200	Molybdenum
VHT 40/16-MO	1600	300	450	300	40	1500	2000	2300	110	three-phase	2000	Molybdenum
VHT 100/16-MO	1600	450	550	450	100	1750	2200	2600	210	three-phase	2800	Molybdenum
VHT 8/18-KE	1800	170	240	200	8	1250 (800)1	1100	2000	15	three-phase	1200	MoSi2/ceramic fiber
VHT 40/18-KE	1800	300	450	300	40	1500	2000	2300	45	three-phase	2000	MoSi2/ceramic fiber
VHT 100/18-KE	1800	450	550	450	100	1750	2200	2600	95	three-phase	2800	MoSi2/ceramic fiber
1With the switching system unit removed *See page 44 for information about supply voltage.   Furnaces - Nabertherm Click here to request a quotation. LHT 02/16 - LHT 08/18 Designed as tabletop models, these compact high-temperature chamber furnaces have a variety of advantages. The first-class workmanship using high-quality materials, combined with ease of operation, make these furnaces all-rounders in research and the laboratory. These furnaces are also perfectly suited for the sintering of technical ceramics, such as zirconium oxide dental bridges. • Tmax 1600 °C, 1750 °C, or 1800 °C • High-quality molybdenum disilicide heating elements • Furnace chamber lined with first-class, durable fibre material • Housing made of sheets of textured stainless steel • Dual shell housing with additional fan cooling for low surface temperature • Furnace sizes of 2, 4, or 8 liters • With lift door, whereby the hot side is away from the operator • Adjustable air inlet • Exhaust air opening in the roof • Type B thermocouple • Switching system with phase-angle firing thyristors (SCRs) Additional equipment ??• Over-temperature limit controller with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the oven and load • Square saggar for charging of up to three layers • Spacer recommended to be placed under the bottom saggar for better temperature uniformity • Protective gas connection • Manual or automatic gas supply system Technical Information Model: LHT 02/16 LHT 04/16 LHT 08/16 LHT 02/17 LHT 04/17 LHT 08/17 LHT 02/18 LHT 04/18 LHT 08/18 Tmax °C 1600 1600 1600 1750 1750 1750 1800 1800 1800 Inner dimensions in mm (WxDxH) 90x150x150 150x150x150 150x300x150 90x150x150 150x150x150 150x300x150 90x150x150 150x150x150 150x300x150 Volume in l 2 4 8 2 4 8 2 4 8 Outer dimensions in mm (WxDxH) 470x700x750+350 470x700x750+350 470x850x750+350 470x700x750+350 470x700x750+350 470x850x750+350 470x700x750+350 470x700x750+350 470x850x750+350 Connected load kW 3.0 5.2 8.0 3.0 5.2 8.0 3.6 5.2 9.0 Electrical connection single-phase 3-phase¹ 3-phase¹ single-phase 3-phase¹ 3-phase¹ single-phase 3-phase¹ 3-phase¹ Weight in kg 75 85 100 75 85 100 75 85 100 Minutes to Tmax² 30 25 25 60 40 40 75 60 60 ¹Heating only between two phases ²If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE

 Nabertherm Chamber Furnaces

 

We offer compact chamber furnaces as an alternative to the pit furnaces described, which can also handle a large number of simple processes.

N 40 E - N 100 E

• Heating from both sides with high-quality heating elements, embedded in protective grooves
• Multilayered insulation with light refractory bricks in the furnace interior and special backup insulation for low power consumption
• Double-walled door with low exterior temperature
• Casing made of sheets of textured stainless steel (non-rusting design)
• Quiet operation of heating with solid state relays
• High-quality types PtRh-Pt thermocouple
• Freely adjustable air intake for good ventilation and short cooling times
• Exhaust air outlet in roof
• Precise temperature characteristic due to fast clocking of switching processes
• Standard tabletop design
• Stand available optionally
• Door contact switch for safety shutoff
• Please see page 44 for a description of the different controllers

 

Model	Tmax	Inner dimensions in mm			Volume	Outer dimensions in mm			Power	Electrical	Weight
	°C	w	d	h	in L	W	D	H	kW	connection*	in kg
N 40 E	1300	360	400	320	40	560	690	570	2,9	single-phase	70
N 60 LE	1200	360	400	440	60	560	690	690	2,9	single-phase	90
N 60 E	1300	360	400	440	60	560	690	690	3,6	single-phase	90
N 100 E	1300	360	610	440	400	560	1035	690	5,5	3-phase	115
*Please see page 44 for more information about mains voltage

 

Professional Chamber Furnaces with Brick Insulation LH or Fibre Insulation LF

LF 120/12 with fibre insulation

 

Cooling fan connected to automatic vent flap for shorter cooling time

The LH 15/12 - LF 120/14 laboratory furnaces have been trusted for many years as professional chamber furnaces for the laboratory. These furnaces are available with either a robust insulation of light refractory bricks (LH models) or with a combination insulation of refractory bricks in the corners and low heat storage, quickly cooling fibre material (LF models). With a wide variety of optional equipment, these models can be optimally adapted to your processes.

LH 15/12 - LF 120/14

• Tmax 1200 °C, 1300 °C, or 1400 °C
• 5-sided heating for very good temperature uniformity
• Heating elements on support tubes ensure free heat radiation and a long service life
• Protection of floor heating and flat stacking surface provided by embedded SiC plate in the floor
• LH models: multilayered, fibre-free insulation of light refractory bricks and special backup insulation
• LF models: high-quality fibre insulation with corner bricks for shorter heating and cooling times
• Door with brick-on-brick seal, hand fitted
• Short heating times due to high installed power
• Side vent with bypass connection for exhaust pipe
• Self-supporting arch for high stability and greatest possible protection against dust
• Quick lock on door
• Freely adjustable air slide intake in furnace floor
• Stand included
• Please see page 44 for a description of the different controllers

• Parallel swinging door, pivots away from operator, for opening when hot
• Separate wall-mounting or floor standing cabinet for switchgear
• Automatic vent flap
• Cooling fan for shorter cycle times
• Protective gas connector, sealed casing
• Manual or automatic gas supply system

 

Model	Tmax	Inner dimensions in mm			Volume	Outer dimensions in mm			Power	Electrical	Weight
	°C	w	d	h	in L	W	D	H	kW	connection*	in kg
LH 15/12	1200	250	250	250	15	570	790	1170	5,0	3-phase1	150
LH 30/12	1200	320	320	320	30	640	860	1240	7,0	3-phase1	170
LH 60/12	1200	400	400	400	60	720	1010	1320	8,0	3-phase	260
LH 120/12	1200	500	500	500	120	820	1110	1420	12,0	3-phase	340
LH 15/13	1300	250	250	250	15	570	790	1170	7,0	3-phase1	150
LH 30/13	1300	320	320	320	30	640	860	1240	8,0	3-phase1	170
LH 60/13	1300	400	400	400	60	720	1010	1320	11,0	3-phase	260
LH 120/13	1300	500	500	500	120	820	1110	1420	15,0	3-phase	340
LH 15/14	1400	250	250	250	15	570	790	1170	8,0	3-phase1	150
LH 30/14	1400	320	320	320	30	640	860	1240	10,0	3-phase1	170
LH 60/14	1400	400	400	400	60	720	1010	1320	12,0	3-phase	260
LH 120/14	1400	500	500	500	120	820	1110	1420	18,0	3-phase	340

Model	Tmax	Inner dimensions in mm			Volume	Outer dimensions in mm			Power	Electrical	Weight
	°C	w	d	h	in L	W	D	H	kW	connection*	in kg
LF 15/13	1300	250	250	250	15	570	790	1170	7,0	3-phase1	130
LF 30/13	1300	320	320	320	30	640	860	1240	8,0	3-phase1	150
LF 60/13	1300	400	400	400	60	720	1010	1320	11,0	3-phase	230
LF 120/13	1300	500	500	500	120	820	1110	1420	15,0	3-phase	300
LF 15/14	1400	250	250	250	15	570	790	1170	8,0	3-phase1	130
LF 30/14	1400	320	320	320	30	640	860	1240	10,0	3-phase1	150
LF 60/14	1400	400	400	400	60	720	1010	1320	12,0	3-phase	230
LF 120/14	1400	500	500	500	120	820	1110	1420	18,0	3-phase	300
1Only heating between two phases *Please see page 44 for information on mains voltage

 

Nabertherm Assay Furnaces

 

N 110/HS with manual lift door and integrated control cabinet

 

Customized pit furnace S 73/HS for the assay of large charges in crucibles

 

Work platform in front of muffle to place load

The N 110/HS furnace is especially used for the assay of precious metals where the insulation and heating must be protected from emerging gasses and vapours. The furnace chamber forms a ceramic muffle which can easily be replaced. In the standard design, the muffle is closed with a firebrick plug. A lift door can be installed instead upon request.

N 110/HS

• Tmax 1300 °C
• Muffle heated from four sides
• Heating elements and insulation protected by ceramic muffle
• Simple replacement of muffle
• Operation also possible with open furnace if brick stopper is removed
• Tool holder on furnace
• Stainless steel exhaust chimney above the door opening for connection of an exhaust system
• Work platform with embedded ceramic plate in front of the muffle opening to place load
• Front side with large service door for easy access to the furnace chamber behind the muffle
• Switching and control unit separate from furnace
• Please see page 44 for a description of the different controllers

Additional Equipment

• Lift door, manually operated with counterweight or electrically operated, for easy opening and closing
• Electrical lift door drive with 2-hand button operation
• Second work platform with embedded ceramic plate below the standard platform
• Double-walled casing with fan cooling to reduce exterior temperatures

Furnaces - Nabertherm

LV 3/11 - LVT 15/11 The models LV 3/11 - LVT 15/11 are especially designed for ashing in the laboratory. A special air intake and exhaust system allows air exchange of more than 6 times per minute. Incoming air is preheated to ensure a good temperature uniformity. ?•Tmax 1100 °C •Heating from two sides by ceramic heating plates •Ceramic heating plates with integral heating element which is safeguarded against fumes and splashing, and easy to replace •Highly durable, high-performance cured vacuum fibre module lining •Housing made of sheets of textured stainless steel •Dual shell housing for low external temperatures and stability •Optional flap door (L) which can be used as work platform or lift door (LT) with hot surface facing away from the operator •Solid state relays provide for lownoise operation •Air exchange of more than 6 times per minute •Good temperature uniformity due to preheating of incoming air Additional equipment ?•Over-temperature limit controller with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the oven and load •Process control and documentation with Controltherm MV software package Technical Information Model: LV 3/11 LV 5/11 LV 9/11 LV 15/11 Tmax °C 1100 1100 1100 1100 Inner dimensions in mm (WxDxH) 160x140x100 200x170x130 230x240x170 230x340x170 Volume in l 3 5 9 15 Outer dimensions in mm (WxDxH) 380x370x750 440x470x850 480x550x900 480x650x900 Connected load kW 1.2 2.4 3.0 3.6 Electrical connection single-phase single-phase single-phase single-phase Weight in kg 20 35 45 55 Minutes to Tmax² 120 120 120 120 ¹Heating only between two phases ²If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE

Model	Tmax	Interior dimensions in mm			Volume	Outer dimensions in mm			Power	Electrical	Weight
	°C	w	d	h	in L	W	D	H	kW	connection*	in kg
N 110/HS	1300	260	340	95	8	760	790	1435	22	3-phase	510
*Please see page 44 for more information about mains voltage

Nabertherm Annealing and Hardening Furnaces and Accessories

 

To withstand harsh use in the laboratory, e.g. when heat-treating metals, robust insulation with light refractory bricks is necessary. The N 7/H - N 61/H models are a perfect fit to solve this problem. The furnaces can be extended with a variety of accessories, like annealing boxes for operation under protective gas, roller guides, or a cooling station with a quenching bath. Even high-performance applications like the annealing of titanium in medical applications can be implemented without the use of expensive and complicated annealing systems.

N 7/H - N 61/H

• Tmax 1280 °C
• Three-sided heating from both sides and the floor
• Heating elements embedded in protective grooves
• Floor heating protected by heat-resistant SiC plate
• Multilayer insulation with high-quality lightweight refractory bricks in the furnace chamber
• Exhaust opening in the side of the furnace, or on back wall of furnace in the N 31/H models and higher
• Models N 7/H - N 17/HR are designed as tabletop models
• Stand included with model N 31/H and up
• Parallel swinging door which opens downward, or upward upon request
• Manual or automatic gassing system

 

Model	Tmax	Inner dimensions in mm			Volume	Outer dimensions in mm			Power	Electrical	Weight	Minutes
	°C	w	d	h	in L	W	D	H	kW	connection*	in kg	to Tmax
N 7/H	1280	250	250	120	7	720	640	510	3,0	single-phase	60	180
N 11/H	1280	250	350	140	11	720	740	510	3,6	single-phase	70	180
N 11/HR	1280	250	350	140	11	720	740	510	5,5	3-phase1	70	120
N 17/HR	1280	250	500	140	17	720	890	510	6,4	3-phase1	90	120
N 31/H	1280	350	350	250	31	840	1010	1320	15,0	3-phase	210	105
N 41/H	1280	350	500	250	41	840	1160	1320	15,0	3-phase	260	120
N 61/H	1280	350	750	250	61	840	1410	1320	20,0	3-phase	400	120
1Only heating between two phases *