Vacuum Pumps and Vacuum Generators Single-Stage Vacuum Pumps JB20H (NPT Version) Specifications: Compressed Air: 50 Micron, Filtered, Non-lubricated Operating Temperature: -10 to 80°C (14 to 176°F) Optimum Operating Pressure: 5 bar (72.5 psi) Valve Material: Anodized Aluminum, Brass Nozzle Part No. Nozzle Size D in. (mm) L1 in. (mm) L2 in. (mm) Air Consumption scfm (l/min.) Vacuum Flow scfm (l/min.) Vacuum Level in Hg (-mmHg) JB20H 20 1.25 (32) 4.65 (118.1) 2.95 (75) 6.10 (170) 4.50 (130) 27 (690)