Air Pressure Regulator, Pneumatic Vacuum Regulator Compact ‑100 to ‑1.3Kpa Pneumatic Vacuum Pressure Regulator Long Life Span with Dial for Industry: Amazon.com: Industrial & Scientific
How Equilibar Vacuum Regulators Work | Equilibar Precision Control
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