AI3600003 Vacuum regulator, 0 to 29" Hg, 2.47cfm from Cole-Parmer
Amazon.com: Jeanoko Pneumatic Vacuum Regulator, Air Pressure Regulator Air Regulator Valve ABS ‑100 To ‑1.3Kpa with Dial for Industry 80 Vacuum Regulator Valve Vacuum Pump Regulator : Industrial & Scientific
How Equilibar Vacuum Regulators Work | Equilibar Precision Control
Precision Medical PM3600, PM3600D 760mmHg Continuous High Vacuum Regulator