Bell lift-off type furnaces with stationary heating systems

The structural feature of this type of furnace is the stationary position of the heating system, which ensures the best maintainability and convenient maintenance of the heating system with frequent use of equipment.
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Description
Specifications

Stationary installed heaters provide the best visual control of the working area when installing cages with products, which allows to increase the percentage of suitable products and make the process as manageable as possible. After the automated lifting, the hood is pulled to the side and the charge of the cage with products is loaded vertically.


The heating elements can be of a cylindrical and strip type, from high-temperature resistance alloys (nichrome, eurofechral, kanthal A1), molybdenum, tungsten, tungsten-rhenium alloy, the installation of an all-welded heater is possible. Such a wide range of materials used allows you to create a furnace with a precise atmosphere, suitable for most industrial processes. The absence of dusty materials in the heating chamber, as well as a special method of surface treatment, allows ultra-pure processes in furnaces.

Property Meaning
Chamber quantity, items 1 или 2
Type of chambers cylindrical, vertically oriented
Inner dimensions of chamber:
diameter, mm height, mm
80-250
100-380
Temperaturein the working chamber,оС: control thermocouples ХА (K) or НН (N) control thermocouples PP (S) or PR (B) control thermocouples BP (A1) or BP (C) control with a wide-range pyrometer 50-1250
50-1600
600-2200
1300-2500
Heating type resistive
Permissible mass with parts, kg 1-35
Available oxygen removal methods nitrogen or inert gas purge, fore-vacuum pumping, multi-stage
Range of heating / cooling speeds, ° C / min 3-25
Working gases hydrogen, helium, nitrogen, argon, methane, formgas
Number of inputs for working gases 2-6
Available operations with working gases mixing moisturizing
Minimum percentage of each gas when mixed, % 5
Range of automatic adjustment of the flow rate of each gas, l / min 30-600
Ability to use as a vacuum or gas vacuum furnace yes
Types of pumping systems oil (rotary vane + diffusion pumps), oil-free (dry scroll + turbomolecular pumps)
The uniformity of temperature in the working space without loading the electric furnace with automatic control of maintaining the temperature in the steady state, ° C, is not worse ±5±0,005t
Stability of maintaining the operating temperature in the working area when controlling heating in automatic mode, ° C, not worse ±3±0,0015t
Heaters power consumption, kVA 15-50
Total dimensions, mm, no more than: length: width high 2300
1500
2500
Weight, kg, no more than 2750

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