R2-A: Two-Stage High-Vacuum Rig

ATM → ~10⁻⁷ mbar | Turbo + Rotary Vane | KF25/KF40/KF16 | 18 Components | Click any component
ROUGHING / VENT ZONE MANIFOLD & VALVE ZONE HIGH-VACUUM PUMP ZONE R2-A Two-Stage High-Vacuum Rig — Component Schematic Roughing path (KF25) + High-vacuum path (KF40) + Foreline (KF16) ATM VENT R2-V-VENT CHAMBER R2-CH ~10-15L SS304 PI R2-G-CH THROTTLE R2-V-THR ISO R2-V-ISO MANIFOLD R2-PM PI R2-G-FL GATE R2-V-GATE CC R2-G-HV TURBO R2-P-HV Turbo Pump R2-L-FL (KF16) FORE R2-V-FORE KF16→KF25 Rotary Vane R2-P-RP (backing) R2-FLT-EXH ATM R2-L-VENT KF40 pump-out
Pipe Colours
Roughing / KF25 (grey)
High-vacuum / KF40 (blue)
Foreline / KF16 (thin)
Components
Turbo pump (blue)
Backing pump (blue)
Valves (orange)
Throttle (gold)
HV gauge (magenta)

R2-A Overview

Two-Stage High-Vacuum Rig
Target PressureATM → ~10⁻⁷ mbar
HV PumpTurbomolecular pump (67 L/s)
Backing PumpRotary vane pump (3.3 m³/hr)
Flange StandardsKF25 KF40 KF16
Components13 major + 6 pipe runs + adapters
Key FeatureThrottle valve for conductance control
Key AdaptersKF16→KF25 (foreline), KF16→KF25 (gauges)
Two-stage pumping: The roughing/backing pump (R2-P-RP) brings pressure from ATM to ~1 mbar. The turbo pump (R2-P-HV) then takes over, using molecular momentum transfer to reach ~10⁻⁷ mbar. The backing pump must keep running to maintain the turbo's foreline below ~10 mbar.
Key difference from R1-A: Gate valve isolates the turbo pump. Throttle valve controls conductance between chamber and manifold. Cold cathode gauge measures deep vacuum. Three flange sizes instead of one.