Total Acid Number (TAN)

The Total Acid Number (TAN) is the number of milligrams of Potassium Hydroxide (mgKOH) required to neutralize the acidic compounds present in one gram of oil.  It is represented in mgKOH/gram. The TAN is an important parameter in lubricating oils and in hydraulic oils.  At high temperatures, the rate of oxidation in oils increases.  This …

Total Base Number (TBN)

The Total Base Number (TBN) indicates the basic(alkaline) nature of an lubricating oil used in engines.  Higher the TBN, more basic is the oil.  Such an oil can withstand highly acidic impurities. TBN is measured in mgKOH/gram.  This indicates the milligrams of Potassium Hydroxide that each gram of the oil is equal to.  Oils used …

Hydraulic Coefficients

In Fluid dynamics, the following four coefficients are known as Hydraulic Coefficients.  They are Coefficient of Contraction This is the ratio of the area of the jet at Vena Contracta to the area of the orifice. Coefficient of Velocity This is the ratio of the actual velocity of the jet at vena contracta to the …