Manufacturer should manufacture the electrically heated, high vacuum, three (03) zone, horizontal, split type (for Rapid Cooling), tubular furnace as per specifications and design given below.
Technical Design
Drawing / sketch explaining the detailed design of the furnace is attached.
Technical Specifications
Detailed specifications are given below:
I.Heating of Furnace
Working Temperature: 1150 °C
No. of Heating Zones: 03
Length of Each Heating Zone: 400 ± 10 mm
Length of Uniform Temperature Zone: 500 mm (Minimum)
Material of Heating Elements: Kanthel - Only
Material of vacuum tight working tube: Inconel 600 or equivalent Nickle base alloy suitable for above mentioned Temperature. Water cooling jackets on both ends of the working tube to be provided.
Inside dia. of working tube: 100 mm (Minimum)
Wall thickness of working tube: 5 mm (Minimum)
Temperature uniformity: ± 5°C (In Uniform Temperature Zone)
Temperature Control: By 03 Thyristors and 03 independent Eurotherm Programmable PID controllers (One for each heating zone), Minimum 8 Segments OR equivalent temperature controllers made from USA, UK, Western Europe or Japan.
Note: The temperature controllers must be selectable for all types of thermocouple.
Safety Controller: A safety controller must be installed in the furnace to shut off the furnace in case of temperature shooting due failure of temperature control, Make: USA, UK, Western Europe or Japan.
Thermocouples: 03 K type thermocouples for controlling/ measuring the temperature of 03 heating zones and 01 K type thermocouple for safety controller, all housed in SS-304 sleeves. Each thermocouple to be fixed in the center of each heating zone while thermocouple for safety controller to be fixed near the thermocouple of central heating zone. The thermocouples should be installed in the furnace in such a way that they should touch working tube but should not be damaged during splitting of the furnace.