HK-model

tmax up to 1300 °C

Chamber furnace for hardening, brick and ASW insulation, Tmax 1300 °C, 31 - 600 l

Applications:

borating, forging, hardening, heat treatment, powder carburization, pre-heating, shrink fitting, tempering

The most important characteristics

Hardening furnace
Small electrically heated chamber furnace with electronic control
For hardening up to 1300°C
Insulation made of shaped stones surrounded by high quality fiber boards
Robust design
Extremely short heating up and cooling down cycles
High energy efficiency
Weight reducing design
Quality made in Germany
Easy operation and handling

We make it possible

Linn High Therm is specialized in adapting its products to customer’s requirements. Please let us know if you need any modifications apart from our standard offer. We will do everything to satisfy your wishes.

Options

Temperature controller G800
Serial interface
Screen recorder
Useful chamber temperature 1300 °C
Gas purging device with sheet cover around furnace brick lining
Lifting door to top

Product Specifications

Sizes

Model	Liter	Inside dimensions mm (w x d x h)	T. max. °C	Heating power kW
HK-30*	31	270 x 420 x 270	1300	7,5
HK-40**	40	340 x 500 x 240	1300	13,5
HK-70**	72	400 x 600 x 300	1300	18,0
HK-160	160	500 x 800 x 400	1300	26,0
HK-315	315	630 x 1000 x 500	1300	41,0
HK-600	600	800 x 1300 x 580	1300	54,0

*table unit

**also available as table unit

Technical data

Furnace housing

Furnace housing, housing of separate switch box and swivelling door (to side, in standard version) consist of a lightweight sheet steel construction. The painting with structural lacquer serves as protection against corrosion. The chosen colours blue/white give a nice appearance to the entire furnace.

Insulation

The rear ventilated brick lining of the furnace consists of high quality lightweight refractory bricks in combination with modern fiber insulation materials which assure a high thermal capacity at low energy consumption.

Heating

Heating is effected by free radiating Kanthal-A1 respectively APM heating spirals in the rims of the brick lining. The bottom heating is covered with SiC boards. When door is opened, heating is switched off from mains with a safety switch.

Switch and control unit

The switch and control unit is located in a separate switch box which is connected to the furnace via flexible lines. The furnace is supplied with the following controller:

Temperature controller G400
2 or 3 setpoint controller with PID behaviour
Logic output
One heating ramp – freely programmable velocity / ramp function
Display of actual value (desired value displayed after pressing the button)
Self-optimization prevents overshooting
Separation of control and configuration level (prevents undesired changes)
Alarm signal in case of thermocouple fracture
Timer with turn-on & turn-off delay (dwell time)
Temperature control for protection against overheating

Product properties

Product Line:	type series
Operation Mode:	Batch
Construction Types:	Furnace
Designs:	Chamber furnace
Temperature Max (°C):	1300
Heatings:	electrical
Heatingmethods:	resistance
Atmospheres:	Air
Applications:	borating, forging, hardening, heat treatment, powder carburization, pre-heating, shrink fitting, tempering

Products- Details