Precautions for Using a 1200°C Vacuum-Atmosphere Tube Furnace
Precautions for Using a 1200°C Vacuum-Atmosphere Tube Furnace
2025-03-06
1200℃ Open-Design Vacuum/Atmosphere Tube Furnace
Precautions for Use
- Read the product user manual before use;
- The user’s power distribution equipment shall be compatible with the operating requirements of the electric furnace. This electric furnace requires a single-phase power supply. For 220V power supply, copper conductors shall be used for the distribution wiring, and the cross-sectional area of the conductors shall not be less than 4 mm². 2 , the air switch of the distribution panel shall not be less than 32A. The enclosure of the electric furnace must be provided with reliable protective grounding or protective earthing.
- Check whether the air line assembly is installed correctly. It is recommended to use our company’s matching vacuum and flow control equipment.
- To extend the service life of the furnace tubes, the heating and cooling rates must be maintained within specified limits. Heating and cooling rate: room temperature ~500℃ ≤ 5℃/min, 500℃ ~ 800℃ ≤ 10℃/min, 800℃ ~ 1000℃ ≤ 5℃/min, 1000℃ ~ 1200℃ ≤ 2℃/min;
- When the furnace temperature is higher than Do not load or unload materials at 200°C. To prevent furnace tube rupture.
- When the furnace temperature is higher than Do not open the upper furnace body at 200°C. To prevent furnace tube rupture.
- When performing vacuum operations, pay attention to the sequence of steps. Before evacuating, ensure that the vacuum inlet is properly connected to the vacuum control system (vacuum pump). During evacuation, first start the vacuum pump; only when the interior of the furnace tube has reached a vacuum state should heating be initiated. When used in conjunction with our company’s vacuum control system, the vacuum pump can be maintained within a specified pressure range. It is prohibited to heat the electric furnace before starting the vacuum system, as this may damage the vacuum pump.
- Strictly comply with gas safety regulations. If you are unfamiliar with the safety regulations for gas use, please consult the gas supplier.
- Pay attention to the order in which gases are introduced. When an atmosphere needs to be introduced into the furnace tube, first verify that the inlet and outlet valves of the furnace tube are closed; if not, close them immediately. During gas introduction, first open the supply valve on the gas cylinder, then slowly open the inlet valve on the furnace tube. Once the pressure gauge indicates a slight positive pressure (do not exceed the gauge pressure (0.05 MPa); at this point, open the vent valve to establish a gas supply mode with both inlet and outlet (the vent must not be sealed). If the furnace tube is first evacuated and then filled with gas, the vacuum pump should be shut down before introducing the gas. During gas introduction, it is recommended that two personnel operate: one controls the inlet valve, and the other controls the outlet valve.
- When introducing the atmosphere, the pressure must not exceed the pressure indicated on the pressure gauge. 0.05 MPa. When the flow rate is excessive or the gas expands due to heating, the pressure will increase; excessive pressure can lead to rupture of the furnace tubes.
- The degree of vacuum achieved depends on the model and specifications of the vacuum pump selected.
- When operating a tubular electric furnace, support flanges must be installed at both ends. ， To prevent stress-induced rupture of the furnace tubes.
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