Evaporative Check Valve

TWO-WAY CHECK VALVE
Port A Opening Vacuum Approx. 0.59 in Hg (15 mm Hg)
Port B Opening Vacuum Approx. 1.73 in Hg (44 mm Hg)

THREE-WAY CHECK VALVE
Port A Opening Vacuum Approx. 1.46 in Hg (37 mm Hg)
Port B Opening Vacuum Approx. 2.76 in Hg (70 mm Hg)