High Temperature Bottom Loader
Vacuum Furnaces

High Temperature Bottom Loader HTBL
up to 2200°C

The production series HTBL are Buttom Loader for thermal heat treatment up to 2200°C, available for useful space from 50 l - 200 l.

The working space is a vertical cylinder. The applications reach from research to production plants.

Graphite furnaces

These furnaces are employed under vacuum / high vacuum, protective gases such as nitrogen / argon, but also with reaction gases like hydrogen and carbon monoxide. Operation with air is not permitted. Applications include technical ceramics such as SIC, SIN, BC, ALN and combinations. In the field of composite materials the applications are employed for pyrolysis, sintering, siliconizing and graphiting. The design incorporates a well dimensioned graphite fibre insulation with an inner graphite rod cage. The permitted capacity is up to 600 kg.

Metallic furnaces
made of Molybdenum and Tungsten

The metallic furnaces have no fibre insulation, permitting the greatest possible purity of the process atmospheres or the best possible final vacuum. The complicated designs are employed for specimens requiring treatment in carbon-free atmospheres. It finds application in the lighting industry, metal powder injection moulding, tempering of saphirs, heat treatment of metals, sintering of pellets in the nuclear industry, manufacture of radar tubes, metallisation of ceramic components, high vacuum brazing etc.

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In the bottom loader version, the bottom is lowered and driven out of the furnace. It then pivots forward to allow easy loading. Moreover, specimen thermocouples can, for example, be placed with pinpoint precision.

Technical data

	Graphite				Molybdenum	Tungsten
Type	HTBL-H 50 GR/22-1G	HTBL 50 GR/22-1G	HTBL 80 GR/22-1G	HTBL 200 GR/22-1G	HTBL 60 MO/16-1G	HTBL 60 W/22-1G
Outside dimensions
WxHxD in mm	2400x 4300x2200	2400x 3500x2200	2400x 4300x2200	2400x 4800x2600	2400x 3300x2200	2400 x3300x2200
Transport weight
complete system in kg	3200	3200	3500	4200	3400	3600
Useful space
using volume in l	50	50	80	200	60	60
DxH (useful space without retorte) in mm	300 x 700	400 x 400	400 x 700	500 x 900	400 x 500	400 x 500
DxH (useful space with retorte) in mm	280 x 680	380 x 380	380 x 680	480 x 880	380 x 480	380 x 480
Thermal values
Tmax (vacuum) in °C	2200	2200	2200	2200	1600	2200
Tmax (atmosphere pressure) in °C	2200	2200	2200	2200	1600	2200
ΔT (between 500 and 2200°C) in K (DIN 17052)	+- 10	+- 10	+- 10	+- 10	+- 10	+- 10
max. heating up ramp (up to 2000°C) in K/min	10	10	10	10	10	10
cooling down time in h	8	8	12	16	5	6
Connecting values
power in kW	120	120	200	300	80	250
Cooling water
volume in l/min	100	100	150	220	64	200
Gas supply
Nitrogen or Argon (others on request) in l/h	500 - 2000	500 - 2000	500 - 2000	500 - 2000	500 - 2000	500 - 2000
Controller	SIEMENS WinCC flex	SIEMENS WinCC flex	SIEMENS WinCC flex	SIEMENS WinCC flex	SIEMENS WinCC flex	SIEMENS WinCC flex