VSF1700 Vacuum atmosphere lifting furnace

  • Detailed

The vacuum atmosphere lifting furnace for silicon carbide heating elements, USES the three layers of shell structure and the Japanese island of 40 program temperature control system, electric phase-shifting trigger, thyristor control, furnace using 1600 type of polycrystal alumina fibre materials imported from Japan, between the furnace shell is equipped with air cooling system, can rise quickly cooling, &energy-saving equilibrium temperature field, low surface temperature and elevating temperature rate quickly, the advantages of energy saving, convenient take material, don't need a crucible tongs stretch into the furnace, suitable for high temperature material taking and vacuum sintering in high temperature annealing is colleges and universities, research institutes, industrial and mining enterprises do powder sintering, ceramic sintering, glass melting, high temperature experiment, the ideal product quality inspection.


1. Heating element



(1) the hot end roughness D1 of the silicon molybdenum rod is 7mm, the average manufacturer adopts 6MM, the heating end is thick, the surface load of the rod is low, and the service life is long.

(2) it adopts hot bending technology, with uniform resistance and long service life

(3) the length of the cold end of the Lu is 210mm, 400X300X300 furnace is 260, the general manufacturer adopts 180mm, and the cold end has a low temperature.

(4) the surface oxidation of silicon molybdenum rod is compact and can better protect the silicon molybdenum rod.


2. Install air switch and leakage protector:


When an electric current or leakage, an empty meeting automatically disconnects.


3. Can connect with computer

This furnace is equipped with communication interface and software, can be directly through the furnace computer control of each parameter, and can be observed from the computer PV on the stove and SV temperature value and instrument operation, the actual temperature of the furnace curve drawing computer real time, and can keep the temperature data of each time, can call up at any time






      Imported              VS                     Chinese

1. High quality high pure alumina polycrystalline fiber cured furnace with vacuum suction and filter molding.

2. Adopt Japanese technology to form.

3. The spacing and pitch of the resistance wire in the furnace are arranged according to the best thermal technology of Japan, and the temperature field is simulated by thermal software

4. Using 4 weeks heating, the temperature is more balanced The furnace can not remove powder, heat insulation, high reflectivity and temperature balance, which is strong against heat and shrinkage


5. Optional UL certified electrical board (all imported electrical appliances approved by UL)



6. Trigger


Soft start limited flow trigger   Most of the manufacturers use the non - limited Xiamen botany trigger

1. Phase shift trigger (with soft start and current limiting function)

2. Current limiting function: no matter how the heating time is adjusted, the secondary current of our electric furnace after the transformer is limited to 170A, and the equipment is limited. Unlimited-flow triggers, if the heating rate is set wrong or too fast, The current is so large at low temperature that the device can trip or burn.

3. Soft start function: the current will gradually increase when starting up, and the impact on the heating element will be small, which will help to prolong the life of the heating element

4. Protection function: if the current exceeds the limiting current, the trigger will automatically cut off the trigger function to cut off the current protection furnace.


7. UL certified transformer


1. The transformer cable is pure copper 
2. Small transformer 
3. Low temperature of transformer






(Optional) Explosion-proof system: the explosion-proof system is composed of solenoid valve, microcomputer, pressure display and transmitter, 24V power supply and ac contactor. The pressure inside the furnace through the display and pressure transmitter into electrical signal is transmitted to the microcomputer, microcomputer through comparing with set value, and then gives the signal control of ac contactor, to control the on-off of the solenoid valve. When the furnace pressure is greater than we set pressure, without the permission of the solenoid valve opening soon, have a blast effect, electromagnetic valve we installed the trachea, users can connect the gas pipe line to outdoor


The explosion protection system has many advantages:
(1), with repeated use: when the pressure is greater than the set value, electromagnetic valve, open the pressure below the set value when the solenoid valve closed, not like a riot of mechanical, overflowing a can't use.
(2), the set point is adjustable, the user can according to need by microcomputer to adjust the opening pressure of solenoid valve
(3), explosion-proof point is very sensitive, because use of microcomputer and electrical signals, a pressure to the blast point initiation immediately.
(4), explosion-proof system security: initiating without any debris.
(if adopt mechanical might be flying out of glass)
(5), explosion-proof system stability is good, because of USES the microcomputer and solenoid valve, to our set point will initiation, the user and can test, unlike the mechanical cannot test, to the point of explosion-proof will open also has a lot of uncertainty.









Chamber size(mm)




Overall meas.(mm)

660X675X 1380

660X 675X1430






N.W.(KG) 265 280 310





Heating element

        silicon carbide rod                     

Temperature controller 

40 programmable segments (Shimaden fp93 made in Japan), 

It can separate into 4,2,1 programs, ie. 4x10 segments.

FP93 have 6 PID controls, different PID are used for low,middle,

high temperature for precise control.

Over-temperature and over-current protection, shutdown automatically when thermocouple is broken

( it will shut down power when temperature is higher than 1620⁰or thermocouples is broken, 

"ON" on the board is off and "OFF" is on)

There is Fahrenheit (F) and Celsius (C) for option.

With 485 communication interface: which can stop the furnace automatically.


1600Alumina polycrystalline fiber. Imported from Japan

Temperature Accuracy

+/- 1 ℃


Phase-shift trigger

Power control


Controlled silicon

Germany Semikron 106/16E

Max. Temperature

1700 ℃

Constant temperature

1600 ℃

Max. Vacuum Temperature


  Vacuum level in cold


Heating Rate

≤20 ℃/ Min

Recommended Heating Rate

≤10 ℃/ Min


Type B

Surface temperature


Safe protection system

The furnace door is equipped with a travel switch, and when the furnace door is lowered, the power supply will be automatically cut off to prevent the electric shock from touching the heating element.

Air switch

 The furnace is equipped with air switch, and when the current exceeds the rated current of the air, the empty meeting automatically jumps open and effectively protects the furnace



Position limit switch

When the lifting rod is at its highest or lowest point, the position limit switch will automatically cut off the lift bar, so that it will not rise or fall

Electric push rod power


Electric push rod lifting speed

420mm/ Min


Gas atmosphere

the highest temperature in all kinds of atmosphere









 vacuum   1500℃

Wet H2


Dry H2



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