Muffle Furnaces up to 1400 °C

Heating elements on support tubes radiating freely into the furnace chamber provide for particularly short heating times and a maximum temperature of 1400 °C.

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Process Control

Function and equipment

Muffle furnace LT 9/14 with lift door

Muffle furnace L 9/14 with flap door

Chimney with fan

Example of an over-temperature limiter

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- Italiano
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These models stand out for their excellent workmanship, advanced and attractive design, and high level of reliability. Heating elements on support tubes radiating freely into the furnace chamber provide for particularly short heating times and a maximum temperature of 1400 °C. These muffle furnaces are a good alternative to the familiar L(T) ../12 series when higher application temperatures are needed.

Standard Equipment

Tmax 1400 °C
Heating from two sides
Heating elements on support tubes ensure free heat radiation and a long service life
Dual shell housing made of textured stainless steel sheets with additional fan cooling for low surface temperature
Exclusive use of insulation materials without categorization according to EC Regulation No. 1272/2008 (CLP)
Adjustable air inlet integrated in door
Exhaust air outlet in rear wall of furnace
Controller with touch operation B510 (5 programs with each 4 segments)
Solid state relays provide for lownoise operation
Defined application within the constraints of the operating instructions
NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

Additional Equipment

Chimney, chimney with fan or catalytic converter
Over-temperature limiter with adjustable cutout temperature as temperature limiter to protect the furnace and load
Protective gas connection to purge with non-flammable process gases (not available in combination with chimney, chimney with fan or catalytic converter), not gas tight
Manual or automatic gas supply system
Process control and documentation via VCD software package for monitoring, documentation and control

Technical specifications

Model	Tmax	Inner dimensions in mm			Volume	Outer dimensions² in mm			Temperature uniformity of +/− 5K in the empty workspace⁵			Max. connected load	Electrical	Weight	Heating time
	in °C¹	w	d	h	in l	W	D	H³	w	d	h	in kW	connection	in kg	in min⁴
L, LT 5/14	1400	225	175	130	5	490	450	580+320	170	120	80	2.6	1-phase	42	45
L, LT 9/14	1400	250	250	170	9	530	525	630+350	180	190	120	3.5	1-phase	55	50
L, LT 15/14	1400	250	350	170	15	530	625	630+350	180	290	120	3.5	1-phase	63	70
¹Recommended working temperature for processes with longer dwell times is 1300 °C ²External dimensions vary when furnace is equipped with additional equipment. Dimensions on request. ³Including opened lift door ⁴Heating time of the empty and closed furnace up to Tmax −100 K (connected to 230 V 1/N/PE) ⁵Temperature uniformity of +/− 5 K with closed fresh-air inlet in empty work space according to DIN 17052-1 at working temperatures above 800 °C