Pressure Rise Rate: A Core Indicator for Fur"&"nace Inspection
A customer who manufactures high-purity graphite was particularly meticulous during equipment acceptance, staring at the pressure rise rate data for a long time. I said, ""Your emphasis on this indicator shows you're an expert.""<"&"/p>
What is Pressure Rise Rate?
Pressure rise rate (PRR), simply put, is: the rate at which the furnace pressure rises over time after all inlet and exhaust valves are closed. The lower the value, the bette"&"r the seal, and the less likely external gases are to penetrate. Our Technical Standards
In a poorly sealed furnace, o"&"xygen and water vapor from the outside air will continuously seep in. At high temperatures, oxidizing gases react with the product to generate oxides, reducing the final purity.
For semiconductor-grade and nuclear-grade graphite, a low pressure rise r"&"ate is a crucial indicator for usability. 2?? Impact on Operating Costs Poor sealing requires continuously consuming more protective gas to dilute infiltrated air, resulting in longer vacuuming times and increased energy consumption. A furnace can be us"&"ed for over a decade, and the accumulated costs are substantial. 3?? Impact on Equipment Lifespan Oxidizing gases accelerate the wear and tear on graphite heating elements and insulation materials. Oxidation of the heating element alters its resistance "&"characteristics, reducing heating efficiency. Poor sealing is tantamount to slowly consuming core components of the equipment. Recommendation: Pressure rise rate is a mandatory inspection item during both factory inspection and on-site acceptance. Every "&"piece of equipment undergoes testing before leaving the factory, and all data is recorded in the acceptance report. We recommend that customers be present throughout the acceptance process to observe how we conduct the tests and record the data.")
