1700/1600 Degree Anti-corrosion Vacuum Atmosphere Bottom Loading Furnace With Silicon Carbide Liner

1700/1600 Degree Anti-corrosion Vacuum Atmosphere Bottom Loading Furnace With Silicon Carbide Liner

Item No.:	VBF1700-I	VBF1700-II
Rated Power:	7KW	13KW
Chamber size (mm)(DXH):	200X210mm	300X310mm
Inner tank size (mm)(DXH):	Dia170X170mm	Dia270X270mm
Overall Dimension (DXWXH)mm:	700X700X1950	900X900X2200
Rated Voltage:	220V , 1 Phase.	380V , 3 Phase.
Working temperature under vacuum:	1500.C
Heating Elements:	1800 type silicon molybdenum rod
Control Mode :	30-segment program temperature control: 1. The 30-segment program temperature control can only be adjusted by PID. 2. With over-temperature protection and broken couple protection, the heating circuit of the electric furnace is automatically cut off when over-temperature or broken couple; (When the temperature of the electric furnace exceeds 1720 degrees or the thermocouple is blown, the AC relay on the main circuit will be automatically disconnected, the main circuit will be disconnected, the ON light on the panel will go out, and the OFF light will be on, limited protection of the electric furnace) 3. With 485 communication interface (standard configuration when purchasing software) 4. With power-off protection function, that is, when the furnace is powered on after power-off, the program does not start from the initial temperature rise, but the furnace temperature starts to rise when the power is off. 5. The instrument has the function of temperature self-tuning.
Chamber Materials:	1800 type alumina polycrystalline fiber (alumina content above 95%) imported from Japan.
Temperature Control Mode :	Intelligent PID
Control Accuracy:	±1 ℃
Thermocouple Type:	B Type
Trigger:	Phase shift trigger
Thyristor:	German SEMIKRON 106/16E
Heating rate:	≤20℃/ Min, suggest ≤10℃/ Min.
Vacuum degree in cold state:	10Pa
Sealing system:	The furnace top cover and furnace door (other places have been welded) are all squeezed and sealed with silicone O-rings, which are convenient to remove, can be removed repeatedly, have good air tightness, and can ensure that the pressure gauge pointer does not deflect for 8 hours . The furnace adopts a three-layer shell structure, and the silicon carbide liner (optional) can be used in the sealing layer, which will not be squeezed into the furnace during vacuuming.
Gas supply system:	The furnace is equipped with a float flow meter, and customers can control the gas flow rate through the float flow meter or the proton flow meter (optional).
Leakage protection function:	There is an air switch on the furnace body, when the current exceeds the rated current of the circuit breaker, the empty meeting will automatically open, effectively protecting the electric furnace.
Safety protection system:	A travel switch is installed on the furnace door. When the furnace door is lowered, the power supply will be automatically cut off to prevent the risk of electric shock when the heating element is touched.
Limit switch:	When the lifting rod reaches the highest or lowest point, the travel switch will automatically power off the lifting rod, so that it will not over-lift or over-drop
Lifting system:	Using automatic lifting stainless steel electric push rod, after pressing the up or down button, the material will rise and fall freely with the lifting tray
Electric putter power:	150w
Electric putter lifting speed:	420mm/ Min
Anti-corrosion (optional)：	Optional: Silicon carbide cover; to prevent corrosive gas from corroding furnace materials and heating elements.
VRD-8 Vacuum pump:	Model no.	VRD-8
	Ultimate partial pressure：	5X10-2 Pa
	Inlet and exhaust interface：	KF25
	Motor speed：	1440RPM
	Pumping rate:	2.2L/S
	Motor Power:	0.4kw
Sweden (INFICON) Pirani ceramic capacitor vacuum gauge (Optional when choosing anti-corrosion function)：	Model no.	PCG554
	Input voltage:	24V 1A DC (with 220V transformer)
	Vacuum gauge interface:	KF16
	Digital Display:	The screen size is 20x14mm, and its data display unit is torr.
	Product Size:	46mm×28mm×126mm ( L x W x H)
	Weight:	5 lbs
	Detection gas:	It can detect various gases, including mixed gases, with accurate measurement and good repeatability
	Whether it is anticorrosive:	Yes
	Response time:	≤30ms
	Measuring range:	3.8×10-5 -1125 Torr.

Maximum operating temperature of VBF1700 in various atmospheres:

Maximum operating temperature in various atmospheres- 1700 deg. atmosphere furnace

Advantages of Atmosphere Lifting Furnace:
1. The heating elements are arranged on 4 sides of the furnace, and the temperature field is more balanced.
2. It is convenient to take materials, especially when materials need to be taken under high temperature. After the materials fall out of the furnace, the user can take them from the tray, so that there will be no radiant heat in the furnace and avoid burns.
3. There are four rod supports around the pallet, and the material is very stable on the pallet.
4. The door of the furnace is in the lower part of the furnace, where the temperature is the lowest, which is conducive to the sealing of the sealing ring and prolonging the life of the sealing ring.

(Optional) Explosion-proof system:

The explosion-proof system is composed of solenoid valve, microcomputer, pressure display and transmitter, 24V power supply, AC contactor, etc. The pressure in the furnace is converted into an electric signal through the pressure display and transmitter and transmitted to the microcomputer. The microcomputer compares with the set value, and then gives a signal to control the AC contactor, thereby controlling the opening and closing of the solenoid valve. When the pressure in the furnace is greater than the allowable pressure set by us, the solenoid valve will open immediately to have an explosion-proof effect. We have installed an air outlet pipe on the solenoid valve, and the user can connect the pipe to discharge the gas outdoors.

Warranty:One year warranty, lifetime technical support;
Note: Consumable parts such as heating elements, sample crucibles, etc. are not covered by the warranty, and damage caused by the use of corrosive gases or materials is not covered by the warranty.

Operating Notes:

1. For safety, please put the stove in a ventilated place.
2. In order to improve the service life of the furnace, we recommend that the heating rate should not exceed 10°C/min. The cooling rate does not exceed 5°C/min.
3. The furnace has no vacuum tightness, and it is forbidden to pass toxic or explosive gases
4. It is forbidden to put the materials directly on the bricks at the bottom of the furnace, please put the materials in the special crucible.
5. When heating, the material and crucible should not touch the heating element and thermocouple
6. If not used for a long time, please bake the oven before using it again.

Detailed description:

• Heating Elements :                                                                                                                                                          (1) The thickness D1 of the hot end of the silicon molybdenum rod is 7mm (6MM used by general manufacturers). The heating end is thick, not easy to bend, the surface load of the rod is low, and the service life is long.
  (2) The hot bending technology is adopted, the resistance is uniform, and the service life is long
  (3) Lu cold end length is 210mm, 400X300X300 furnace is 260 (generally manufacturers use 180mm) The cold end long furnace top temperature is low.
  (4) The oxide protective film on the surface of the silicon molybdenum rod is dense, which can better protect the silicon molybdenum rod.
• Installed with air switch and leakage protector:
  When the circuit is over-current or leakage, the switch is automatically disconnected.   
• It can be connected to the computer.                                                                                                                                                                    The furnace is equipped with communication interface and software, which can directly control the various parameters of the furnace through the computer, and can observe the PV and SV temperature values on the furnace and the operation of the instrument from the computer. The actual temperature rise curve of the furnace will be drawn by the computer in real time. And it can save the temperature data at each moment, and it can be recalled at any time.                             
• Chamber :                                                                                                                             1. High-quality and high-purity alumina polycrystalline fiber curing furnace formed by vacuum suction filtration.
  2. Using Japanese technology to form.
  3. The furnace material has low heat capacity and low thermal conductivity, resulting in less heat dissipation, good heat preservation and high reflectivity. The temperature field is balanced.
  4. The furnace alumina wire is thin and long, has high temperature resistance, and has strong resistance to thermal expansion and contraction.
  5. The surface of the furnace is smooth and not easy to drop powder.
• Trigger :                                                                                                                                         1. Phase shift trigger (with soft start and current limiting function)
  2. Current limiting function: No matter how the heating rate is set, the secondary current of our electric furnace is always limited to 170A, which effectively protects the equipment. Due to the current limiting function, the furnace door can be opened at high temperatures.
  If you use an electric furnace that needs to limit the heating rate of the furnace during the heating process (for example, it is stipulated that it should not exceed 3°C/min after 1400°C, etc.), then use a non-limiting trigger. If the heating rate is set incorrectly or the heating rate is too fast, the current will be very large and the device will trip or burn out.
  3. Soft start function: The current will increase slowly when starting up, and the impact on the heating element is small, which is beneficial to the extension of the heating element life.
  4. Protection function: If the current exceeds the limit current, the trigger will automatically cut off the trigger function to cut off the current to protect the electric furnace.
• UL certified transformer                                                                                                                                            1. The transformer cable is pure copper
  2. The transformer sound is small
  3. Low temperature transformer
• Optional UL certification electrical board (all imported electrical appliances that have passed UL certification) 
• Certification：  UL, SA, TUV are ready to be certified, additional costs are required.                                           

STANDARD ACCESSORIES 1700/1600 degree Vacuum Atmosphere Bottom Loading Furnace

1.  Temperature Controller:                                                                                                                                                                                          Regular by Yudian controller, other Brand- SHIMADEN / EUROTHERM or touch screen ones optional.           
2. (Optional) Explosion-proof system:                                                                                                                                                                     The explosion-proof system is composed of solenoid valve, microcomputer, pressure display and transmitter, 24V power supply, AC contactor, etc. The pressure in the furnace is converted into an electric signal through the pressure display and transmitter and transmitted to the microcomputer. The microcomputer compares with the set value, and then gives a signal to control the AC contactor, thereby controlling the opening and closing of the solenoid valve. When the pressure in the furnace is greater than the allowable pressure set by us, the solenoid valve will open immediately to have an explosion-proof effect. We have installed an air outlet pipe on the solenoid valve, and the user can connect the pipe to discharge the gas outdoors.                                                     The explosion-proof system has many advantages:
   (1) Reusability: The solenoid valve opens when the pressure is greater than the set value, and closes when the pressure is lower than the set value. Unlike a mechanical riot control device, it cannot be used once it bursts.
   (2) The setting value is adjustable: the user can adjust the opening pressure of the solenoid valve through the microcomputer as needed
   (3) The explosion-proof point is very sensitive: because the microcomputer and electric signal are used, it will detonate as soon as the pressure reaches the explosion-proof point.
   (4) Explosion-proof system safety: no fragments fly out during detonation. (If the mechanical type is used, the glass may fly out)
   (5) The explosion-proof system has good stability: because of the use of microcomputers and solenoid valves, it will detonate at our set point, and users can test it. Unlike the mechanical type that cannot be tested, there are many differences in whether the explosion-proof point will open or not. Certainty.