HT gas tight retort furnace is equipped with direct or indirect heating depending on temperature. This hot wall retort furnace is perfectly suited for various heat treatment processes requiring a defined protective or a reaction gas atmosphere with a slight overpressure. These compact models can also be laid out for heat treatment under vacuum up to 600 °C. The hot-wall retort furnace chamber consists of a gas tight retort with water cooling around the door to protect the special sealing. With the corresponding safety technology, retort furnaces are also suitable for applications under reaction gases, such as hydrogen or, in combination with the IDB package, for inert debinding or for pyrolysis processes.
Different model versions are available depending on the temperature range:
Models NRA /06 with Tmax 600 °C
Heating elements located inside the retort
Retort made of 1.4571 (X6CrNiMoTi 17-12-2)
Air circulation fan and baffle for directed gas flow
Insulation made of mineral wool
hot-wall retort furnace temperature control with measurement inside the retort
Models NRA/09 with Tmax 900 °C
Design like models NRA/06 with following differences:
Outside heating with heating elements around the retort
Retort made of 1.4828 (X15CrNiSi 20-12)
Multi-layer refractory insulation and micro-porous panel material
Furnace temperature control with measurement outside the retort
Models NR/11 with Tmax 1100 °C
Design like models NRA /09 with following differences:
Retort made of 1.4841 (X15CrNiSi 25-21)
Without gas-circulation and baffles
Welded support brackets
Standard Equipment
Compact design with integrated control and gas supply up to gas tight retort furnace.
Exclusive use of insulation materials without categorization according to EC Regulation No 1272/2008 (CLP). This explicitly means that alumina silicate wool, also known as “refractory ceramic fiber” (RCF), which is classified and possibly carcinogenic, is not used.
Swivel door hinged on right side
Open cooling water system
Control divided into several heating zones
Temperature uniformity up to +/− 8 °C according to DIN 17052-1 in the empty work space see page 85
Gas supply system for one non-flammable protective or reaction gas with flow meter and magnetic valve
Defined application within the constraints of the operating instructions
Upgrade for other non-flammable gases
Mass flow controller MFC
Process controls H3700, H1700 (PLC) including remote maintenance module
Temperature control as charge control with temperature measurement inside and outside the retort
Indirect and/or direct cooling
Heat exchanger with closed-loop cooling water circuit for door cooling
Oxygen sensor and dew point sensor
Parallel swing door or electric bayonet catch
Retort, made of 2.4633 for Tmax 1150 °C
External switchgear with or without cabinet cooling
Charge support or custom-built charging trolley
Temperature uniformity optimized according to DIN 17052 or AMS2750F to +/− 5 °C in empty work space.
HT gas tight retort furnace is equipped with direct or indirect heating depending on temperature. This hot wall retort furnace is perfectly suited for various heat treatment processes requiring a defined protective or a reaction gas atmosphere with a slight overpressure. These compact models can also be laid out for heat treatment under vacuum up to 600 °C. The hot-wall retort furnace chamber consists of a gas tight retort with water cooling around the door to protect the special sealing. With the corresponding safety technology, retort furnaces are also suitable for applications under reaction gases, such as hydrogen or, in combination with the IDB package, for inert debinding or for pyrolysis processes.
Different model versions are available depending on the temperature range:
Models NRA /06 with Tmax 600 °C
Heating elements located inside the retort
Retort made of 1.4571 (X6CrNiMoTi 17-12-2)
Air circulation fan and baffle for directed gas flow
Insulation made of mineral wool
hot-wall retort furnace temperature control with measurement inside the retort
Models NRA/09 with Tmax 900 °C
Design like models NRA/06 with following differences:
Outside heating with heating elements around the retort
Retort made of 1.4828 (X15CrNiSi 20-12)
Multi-layer refractory insulation and micro-porous panel material
Furnace temperature control with measurement outside the retort
Models NR/11 with Tmax 1100 °C
Design like models NRA /09 with following differences:
Retort made of 1.4841 (X15CrNiSi 25-21)
Without gas-circulation and baffles
Welded support brackets
Standard Equipment
Compact design with integrated control and gas supply up to gas tight retort furnace.
Exclusive use of insulation materials without categorization according to EC Regulation No 1272/2008 (CLP). This explicitly means that alumina silicate wool, also known as “refractory ceramic fiber” (RCF), which is classified and possibly carcinogenic, is not used.
Swivel door hinged on right side
Open cooling water system
Control divided into several heating zones
Temperature uniformity up to +/− 8 °C according to DIN 17052-1 in the empty work space see page 85
Gas supply system for one non-flammable protective or reaction gas with flow meter and magnetic valve
Defined application within the constraints of the operating instructions
Upgrade for other non-flammable gases
Mass flow controller MFC
Process controls H3700, H1700 (PLC) including remote maintenance module
Temperature control as charge control with temperature measurement inside and outside the retort
Indirect and/or direct cooling
Heat exchanger with closed-loop cooling water circuit for door cooling
Oxygen sensor and dew point sensor
Parallel swing door or electric bayonet catch
Retort, made of 2.4633 for Tmax 1150 °C
External switchgear with or without cabinet cooling
Charge support or custom-built charging trolley
Temperature uniformity optimized according to DIN 17052 or AMS2750F to +/− 5 °C in empty work space.
