CF flange and KF flange: Differences in vacuum applications

CF flange and KF flange are two different flange connection standards, each suitable for specific application environments and connection requirements. Here are the main differences between them:

🔍  Sealing performance: CF flanges are mainly used for applications in ultra-high vacuum (UHV) and high vacuum (HV), with high sealing performance that can provide reliable sealing effects in high vacuum environments. In contrast, KF flanges are mainly used for ordinary vacuum (HV) and low vacuum (LV) applications, and their sealing performance is relatively lower than CF flanges.

📏  Size standard: The size standard for CF flanges uses millimeters (mm) as the unit, such as CF16, CF35, CF63, etc. The size standard for KF flanges is measured in inches, such as KF16, KF25, KF40, etc.

🔩  Connection method: CF flange connection usually adopts clamp clamping method, which requires tightening with bolts and nuts, and the connection is relatively complex. The KF flange connection adopts a quick clamping method, which only requires rotating the clamp to achieve connection and disassembly, making it more convenient and efficient.

🏞️  Application areas: CF flanges are mainly used in fields that require high vacuum degree and sealing performance, such as scientific research, aerospace, semiconductor manufacturing, etc. KF flanges are mainly used for ordinary vacuum and low vacuum applications, such as vacuum equipment and systems in laboratories and industrial production.