Vacuum Catalogue - Edwards

ConversionsPressure Unitsmbar bar Torr Pa (Nm –2 ) atm lbf inch –21 mbar = 1 1 x 10 -3 0.75 10 2 9.87 x 10 -4 1.45 x 10 -21 bar = 10 3 1 7.5 x 10 2 1 x 10 5 0.987 14.51 Torr = 1.33 1.33 x 10 -3 1 1.33 x 10 2 1.32 x 10 -3 1.93 x 10 -21 Pa (Nm -2 ) = 0.01 1 x 10 -5 7.5 x 10 -3 1 9.87 x 10 -6 1.45 x 10 -41 atm = 1.01 x 10 3 1.01 7.6 x 10 2 1.01 x 10 5 1 14.71 lbf inch -2 = 68.9 6.89 x 10 -2 51.71 6.89 x 10 3 6.80 x 10 -2 11 kgf cm -2 = 9.81 x 10 2 0.98 7.36 x 10 2 9.81 x 10 4 0.97 14.21 inch Hg = 33.9 3.39 x 10 -2 25.4 3.39 x 10 3 3.34 x 10 -2 0.491 mm Hg = 1.33 1.33 x 10 -3 1 1.33 x 10 2 1.32 x 10 -3 1.93 x 10 -21 inch H 2 O = 2.49 2.49 x 10 -3 1.87 2.49 x 10 2 2.46 x 10 -3 3.61 x 10 -21 mm H 2 O = 9.81 x 10 -2 9.81 x 10 -5 7.36 x 10 -2 9.81 9.68 x 10 -5 1.42 x 10 -3Leak Rate Unitskgf cm –2 inch Hg mm Hg inch H 2 O mm H 2 O1 mbar = 1.02 x 10 -3 2.95 x 10 -2 0.75 0.40 10.21 bar = 1.02 29.53 7.5 x 10 2 4.01 x 10 2 1.02 x 10 41 Torr = 1.36 x 10 -3 3.94 x 10 -2 1 0.54 13.61 Pa (Nm -2 ) = 1.02 x 10 -5 2.95 x 10 -4 7.5 x 10 -3 4.01 x 10 -3 0.1021 atm = 1.03 29.92 7.6 x 10 2 4.07 x 10 2 1.03 x 10 41 lbf inch -2 = 7.03 x 10 -2 2.04 51.71 27.68 7.03 x 10 21 kgf cm -2 = 1 28.96 7.36 x 10 -2 3.94 x 10 2 1 x 10 41 inch Hg = 3.45 x 10 -2 1 25.4 13.6 3.45 x 10 21 mm Hg = 1.36 x 10 -3 3.94 x 10 -2 1 0.54 13.601 inch H 2 O = 2.54 x 10 -3 7.36 x 10 -2 1.87 1 25.41 mm H 2 O = 10 -4 2.90 x 10 -3 7.36 x 10 -2 3.94 x 10 -2 1Note also: 1 dyn cm –2 (barye) = 0.1 Pa (Nm –2 ) = 10 –3 mbar13Page466mbar l s -1 Torr l s -1 atm cm 3 s -1 lusec atm ft 3 min -11 mbar l s -1 = 1 0.75 0.99 7.5 x 10 2 2.09 x 10 -31 Torr l s -1 = 1.33 1 1.32 x 10 3 10 3 2.79 x 10 -31 atm cm 3 s -1 = 1.01 0.76 1 7.6 x 10 2 2.12 x 10 -31 lusec = 1.33 x 10 -3 1 x 10 -3 1.32 x 10 -3 1 2.79 x 10 -61 atm ft 3 min -1 = 4.78 x 10 2 3.59 x 10 2 4.72 x 10 2 3.59 x 10 5 1Pumping Speed UnitsMaterial safety data sheetsl s –1 l min –1 ft 3 min –1 m 3 h –11 l s -1 = 1 60 2.119 3.601 l min -1 = 0.017 1 0.035 0.061 ft 3 min -1 = 0.472 28.317 1 1.6991 m 3 h -1 = 0.278 16.667 0.589 1Shop online at www.edwardsvacuum.com