Built Up Back Pressure Calculation

My friend, do you still remember? One of consideration in selection of relief valve type is built up back pressure. In this article I will explain you how to calculate the built up back pressure. Oh, do you still remember what is built up back pressure? Is it a constant or variable?

Back Pressure Effect

In the previous article, two kinds of back pressure have been discussed. We have already understood that back pressure has several impacts to PSV performance. In this article, we will learn the impact of back pressure on the relief valve opening, operation and flow capacity.

Built Up and Superimpossed Back Pressure

Back pressure is defined as pressure that exists at PSV’s outlet. It has impact to performance of PSV, hence its value should be informed to vendor therefore shall be stated in the datasheet. Good concept understanding of the back pressure is helpful when calculates its value.