Preventing cavitation starts in the planning phases of a system. NPSH calculations can help make sure a system never has the opportunity to experience cavitation. Pumps all have a set amount of NPSH required (NPSHr), so the system must always have a level of NPSH available (NPSHa) that exc...
NPSHr is the minimum amount of pressure required on the suction side of the pump to avoid cavitation, or the introduction of air into the fluid stream. NPSHr is determined by the pump. You always want NPSHa>NPSHr. NPSHa, with "a" standing for available, is determined by the process ...
First, by looking at the net positive suction head required (NPSHr) curve of the pump. This is a calculation of how much absolute pressure is needed at the inlet to keep the system from cavitating. Second, calculate the NPSH available (NPSHa). This value represents the absolute...
He also knew that it required a larger audience in order to achieve its full import. While his first major work on the topic, The Bio- sphere, was quickly translated and published in French in 1929, the publication of his other writings would take a longer time to appear in translation,...