Absolute pressure: Absolute pressure refers to the real pressure inside or somewhere in the equipment, it is equal to the sum of gauge pressure and atmospheric pressure, i.e.
P absolute = P gauge + P atm
P absolute: absolute pressure;
P gaug: gauge pressure;
P atm: Local atmospheric pressure.
Gauge pressure: Gauge pressure refers to the difference between the absolute pressure inside the device or somewhere and the local atmospheric pressure, namely
P gauge = P absolute - P atm
Vacuum degree: The vacuum degree refers to the value of the absolute pressure inside the equipment or somewhere less than the local atmospheric pressure, namely
P vacuum = P atm - P absolute
Where: P vacuum: vacuum degree
For example, the pressure in the vacuum tank/vacuum chamber of the vacuum oil purifier is lower than the atmospheric pressure. It is known that the reading of the vacuum pressure gauge is 690mmHg, and the local atmospheric pressure is 710mmHg. How much is the absolute pressure in the vacuum tank?
P absolute = P atm - P vacuum = 710 – 690 = 20 (mmHg)
= 20/735.6= 0.027 (kgf/cm2)
= 20/(7.5 x10-3)= 2666.7 (Pa)
= 2666.7x10-5 = 0.0267 (bar)
PureTech is a manufacturer of oil filtration machines for various industrial lubricating oils, such as gear oil, transformer oil, turbine oil, hydraulic oil, compressor oil, coolant oil, etc. Our products types include Vacuum Oil Purifier (Transformer Oil Purifier, Turbine Oil Purifier, Lubricating Oil Purifier), Coalescing Oil Purifier, Centrifugal Oil Separator, Plate Frame Oil Filter Unit, Portable Oil Filter Cart, etc.
Contact us to get the solution for your used oil treatment.
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