Question: What are the ultimate vacuum pressure and working vacuum pressure? How is the vacuum pump unit configured (brands and models of mechanical pump, Roots pump, diffusion pump)?
Detailed Answer:
The vacuum system is key to achieving a specific process environment in a graphitization furnace. Understanding its capabilities and limitations helps you better plan your production processes. Our equipment is primarily designed for operation under high-purity atmosphere protection with slight positive pressure, while also possessing high vacuum capabilities to meet special requirements.
I. Primary Operating Mode: Slight Positive Pressure Atmosphere Protection
· Working Principle: The vast majority of graphitization processes are carried out under the protection of a high-purity inert gas. At this point, we continuously introduce a small amount of gas into the furnace, maintaining a pressure slightly above the external atmospheric pressure.
· Core Advantage: Slight positive pressure effectively prevents outside air from infiltrating, providing an optimal protective environment for graphite products and heating elements. It is an efficient mode that balances performance with operating costs.
II. Vacuum Capabilities and Important Limitations
· Ultimate Vacuum Pressure: Our equipment has high vacuum pumping capability, reaching an ultimate vacuum pressure of 1×10?² Pa. This is sufficient for processes requiring a high vacuum environment, such as degassing or high-temperature purification of certain materials.
· Important Warning: High-Temperature Risk Under High Vacuum: We must emphatically remind you to avoid prolonged ultra-high temperature operation under high vacuum. The reason is that under extremely high temperatures and vacuum levels, the graphite heaters and graphite felt insulation inside the furnace can undergo severe sublimation. This will drastically shorten their service life and potentially contaminate the products. Therefore, the atmosphere protection mode is always preferred for high-temperature processes.
III. Customized Configuration of Vacuum Pump Units
The vacuum pump unit is not a "one-size-fits-all" standard configuration. Its selection depends entirely on:
· Effective Heating Zone Volume: The larger the volume, the higher the required pumping speed.
· Process-Required Vacuum Level and Pump-Down Time: The more demanding the requirements, the more powerful the pump unit configuration needs to be.
We will configure the most reasonable and economical vacuum pump unit solution based on your specific process needs, ensuring a balance between performance and cost.
The above technical article is exclusively written by Yuanhang Industrial Furnace Company. Reproduction is prohibited.
