Differences Between Common Vacuum Flange Standards
When designing vacuum systems, understanding the various flange standards is crucial. Three common types are CF, KF, and ISO flanges, each with unique structures, applications, and standards. This article aims to clarify the differences and connections between these flanges to aid in your vacuum system design. 1. CF Flanges CF Flanges , short for Conflat Flanges, are used in ultra-high vacuum (UHV) applications. These flanges feature a metal seal capable of withstanding high-temperature baking, making them ideal for stringent vacuum requirements. Specifications: Nominal Diameter Sizes: DN16, 40, 63, 100, 160, 200, 250 Maximum Vacuum: Up to 10^-12 mbar (convert to Pa using online tools if needed) Seal Materials: Viton, PTFE, oxygen-free copper, etc. Flange Materials: Typically made from 304 or 316 stainless steel Components: Flange Metal seal (e.g., oxygen-free copper gasket) Fasteners Usage: Ideal for ultra-high vacuum systems Commonly used in scientific research, semic...