1700 deg. Hydrogen Vacuum Atmosphere Furnace With Molybdenum Wire Heating

1700.C vacuum atmosphere hydrogen furnace uses 1800 molybdenum wire as heating element, adopts three-layer shell structure and Japan Shimaden’s 40-stage program temperature control system, phase shift trigger, thyristor control, and the furnace adopts Japanese imported alumina polycrystalline fiber material , The inner and outer chambers are equipped with an air-cooled system, which can quickly raise and lower the temperature. The shell is sealed as a whole. The cover and the furnace door are sealed with high-temperature silica gel O-rings. The furnace door is equipped with a water-cooling system. The gas enters from the back chamber after passing through the flowmeter, and is discharged from the outlet valve at the furnace door after passing through the furnace. The furnace can be sintered under vacuum. The furnace has a KF25 quick-connect interface on the side, which can be connected to a vacuum pump. The vacuum pump outlet is equipped with a smoke filter and the exhaust port is equipped with a dust filter; and is equipped with a bellows, a vacuum pump (connected Furnace and vacuum metal tube), KF25 quick clamping sleeve, vacuum baffle valve, imported resistance vacuum gauge, etc. The minimum vacuum of the furnace is less than 10Pa, and hydrogen, argon, nitrogen, oxygen, carbon monoxide, ammonia decomposition gas can also be passed The furnace has the advantages of small size, balanced temperature field, low surface temperature, fast temperature rise and fall, and energy saving. It is an ideal product for universities, scientific research institutes, and industrial and mining enterprises for atmosphere protection sintering and atmosphere reduction.

The furnace is sealed with glove box technology, and the sealing effect is very good. It can be used under vacuum or atmosphere. When vacuuming and maintaining pressure, it can ensure that the pressure gauge pointer does not deflect within 5 hours.

1700 deg. Laboratory Vacuum Hydrogen Sintering Atmosphere Furnace

This hydrogen atmosphere furnace with molybdenum wire as the heating element cannot be heated in air or oxygen. The following table shows the maximum heating temperature of the atmosphere furnace in the following gases
(Hydrogen atmosphere furnace with molybdenum wire as heating element can only be heated in the following atmosphere)：

Maximum operating temperature of hydrogen furnace with 1800 molybdenum wire as heating element

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:

It is forbidden to use the furnace in air or oxygen environment
If you use hydrogen, please pay special attention to the following points:
1. H2 is a flammable and explosive gas. Its combustion temperature is 400℃. It will explode when its mixing ratio with air reaches 4.0%-74.2%. Therefore, safety measures must be taken when using hydrogen.
2. The maximum pressure in the furnace chamber is 0.02Mpa, so when gas is introduced into the furnace chamber, a pressure reducing valve must be installed on the gas cylinder;
3. Before entering hydrogen, the furnace must be cleaned with inert gas.
4. The air pressure inside the furnace should always be kept between 0.01-0.02 Mpa during use to prevent air from flowing back into the furnace and causing an explosion.
5. The room where the equipment is placed must be well ventilated.
6. In order to keep the air pressure in the furnace relatively stable during the heating process, we recommend that the heating rate of the equipment is less than 10°C/min.
7. This furnace cannot be put into toxic and corrosive gas, otherwise it will damage the furnace and heating elements

Detailed description:

• Heating Elements :                      1800 molybdenum wire is heating element.
• 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.                                           

OPTIONAL SYSTEM / DEVICE :

• Optional 1.) Explosion-proof system: 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 play an anti-explosion effect. We have installed an air outlet pipe on the solenoid valve, and the user can connect the pipe to exhaust the gas outdoors, and the explosion-proof valve is one-way The valve can only exhaust gas, not return flow, which effectively guarantees the safety of the furnace.
  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 immediately when the pressure reaches the explosion-proof point.
  (4) Explosion-proof system safety: no fragments fly out during detonation. (If a 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.
• Optional 2.) Hydrogen detector: The furnace can be equipped with a hydrogen detector. When the hydrogen concentration around the furnace reaches the alarm point of the hydrogen detector, the hydrogen detector will automatically alarm.
• Optional 3.) alarm system: When the pressure in the furnace is lower than a standard atmospheric pressure (the pressure value is adjustable), the electric furnace will automatically alarm to indicate that the intake air flow is insufficient, and can decide whether to cut off the heating circuit power according to the needs of the customer.
• Optional 4.) Gas supply system: The furnace can be equipped with 2 or 3 float flow meters, which can control the gas flow rate. Each inlet has a stainless steel valve. You can choose one of them or Several channels are used to adjust the gas. The gas enters the gas mixing tank after passing through the flow meter, and then enters the furnace body in 3 channels, so that the gas can flow into the furnace body evenly.
• Optional 5.) Vacuum system: The atmosphere box furnace can be pre-evacuated to speed up the cleaning of the air in the furnace.
• Optional 6.) Combustion device: The furnace can be equipped with a hydrogen combustion controller, a burner, an ignition coil and a flame detector, which can automatically ignite the furnace, the ignition is completed, the normal working indicator light is on, and the flame detection starts to work. If the flame goes out in the middle, the gas outlet The solenoid valve will automatically close, and an audible and visual alarm will be issued.
• Optional 7.) Water cooling system: The furnace is equipped with a water cooler, which can automatically cool the road entrance.