What are the division points between a high pressure supply piping and a loert pressure return piping in a vacuum system?

In a vacuum system, the division points between high-pressure supply piping and lower pressure return piping typically occur at the pressure transition zones, which are usually marked by valves or other control devices. The high-pressure side generally includes components like pumps and compressors, while the lower pressure side includes condensers or separators. It's essential to maintain proper sealing and vacuum integrity at these division points to prevent leaks and ensure efficient operation of the system. Proper identification of these points also aids in maintenance and troubleshooting.