N:Newton, 1n=0.101097Kgf
Pa:Pascal, Pa=N/m^2
mmAq:Aq=Short for Aqua (water column)
mmAq is also called mmH2O; 1mmAq=1Kg/m^2
atm: Atmospheric pressure; Atmospheric pressure is equal to the pressure of 760mmHg in a dry state at 0°C.
Because the weight of mercury is 13.5947 times that of water, the atmospheric pressure is equal to the pressure of 10332mmH2O
bar: 1 bar=0.00001Pa=10-5Pa
| Pa | mmH2O | inH2O | mmHg | Kgf/cm∧2 | atm | bar | Lbf/in∧2 | ||
| 1 | 0.10197 | 4.017mili | 7.5mili | 10.197μ | 9.869μ | 10μ | 14.5mili | ||
| 9.80665 | 1 | 39.39mili | 73.558mili | 100μ | 96.78μ | 98.06μ | 1.422mili | ||
| 249 | 25.4 | 1 | 1.8683 | 2.54mili | 2.46mili | 2.49mili | 36.1mili | ||
| 133.228 | 13.5947 | 0.535 | 1 | 1.359mili | 1.358mili | 1.3332mili | 10.337mili | ||
| 98.0665k | 10k | 393.7 | 990.1 | 1 | 0.9678 | 0.980665 | 14.2234 | ||
| 101.325k | 101.332k | 407.1 | 1023 | 1.03323 | 1 | 1.0325 | 14.696 | ||
| 100k | 10.197k | 401.8 | 1009.62 | 1.01972 | 0.986923 | 1 | 14.5038 | ||
| 6.895k | 703.1 | 27.686 | 69.61 | 70.31mili | 68.05mili | 68.95mili | 1 | ||
| 1 in=25.4mm;1Lb=445g;k=1000;mili=0.001;μ=0.000001 | |||||||||
| T[°C] | 32 | 36 | 40 | 50 | 60 | 70 | 80 | 90 | 100 |
| Ps[mmHg] | 35.76 | 44.57 | 55.3 | 92.5 | 149.5 | 234 | 355 | 526 | 760 |
The air flow inhaled by the blower per unit time is called Air volume (Air quantity), usually Q (m*3/min) is used as the gas volume. When air is inhaled, it is specifically called the air volume. It is also called in the case of fans Air volume. (Capacity) The volume of gas changes according to its pressure and temperature, so when referring to the amount of discharged air, the pressure and temperature of the place must be noted, so it is called the amount of inhaled air.
＊Standard air: humid air with temperature 20°C, atmospheric pressure 760mmHg, humidity 65% is standard air, and the weight per unit volume (also called specific weight) is L2Kg/m*3
＊Standard air: Humid air with temperature O°C, atmospheric pressure 760mmHg and humidity 0% is standard air. At this time, the weight per unit volume of air (also called specific weight) is 1.293Kg/m*3. Expressed in Nm*3/min
