What is the formula for net oil pressure?

Net oil pressure is defined as the effective pressure available to circulate oil through a system, especially in mechanical applications like engines or compressors. To calculate net oil pressure, you take the pressure generated by the oil pump and subtract the pressure in the crankcase.

This is because the crankcase pressure can act as a counteracting force to the oil pump's output pressure. Therefore, by subtracting the crankcase pressure from the oil pump discharge pressure, you determine how much effective pressure is actually available for oil circulation. This is critical for ensuring adequate lubrication and cooling within the system, which helps to maintain optimal operational conditions and prevent potential damage to components.

In summary, net oil pressure is the result of subtracting crankcase pressure from the discharge pressure of the oil pump. This relationship ensures that you are accounting for any resistance that the crankcase might impose on the oil flow provided by the pump.