🛠️ High-Vacuum Pump-Down: Roughing, Turbo Pump, Gate Valve and Interlocks (2D piping diagram)

2D piping diagram of a two-stage vacuum system. Operate the backing pump, roughing valve, turbo pump, gate valve and vent yourself (or run the automatic sequence), watch pressure fall from atmosphere to high vacuum on a log plot, and see the interlocks refuse unsafe moves. Same lumped-parameter model file as the 3D page, with five in-page numerical checks.