Vacuum Pumps and Vacuum GeneratorsANVER Q-VDF Series Adjustable Vacuum Pumps Q-VDF750 Performance and Dimensional Specifications: Model Number Air Consumption vs. Vacuum Level (“Hg) @ 80 PSI 0″ 5″ 10″ 15″ 20″ 25″ Q-VDF750 0 23.00 30.80 44.00 63.00 90.00 Model Number Vacuum Flow (SCFM) vs Vacuum Level (“Hg) @ 80 PSI 0″ 5″ 10″ 15″ 20″ 25″ Q-VDF750 0 40.00 51.00 69.80 87.00 120.00 Model Number A Barrel ID in. (mm) B in. (mm) C Collar Length in. (mm) D in. (mm) E Input F Barrel OD in. (mm) G Collar OD in. (mm) H in. (mm) I Thread J Thread Q-VDF750 0.750 (19.1) 1-1/2 (38.1) 2 (50.8) 1 (25.4) G1/2″ 1-1/2 (38.1) 2-1/4 (57.2) 3-3/8 (85.7) G1″ G3/4″