Question

Fluid flowing through a constriction or partially opened valve in a pipe system may develop localized low pressures due to increased velocity. If a pipe contains water at 210 °F, what is the minimum absolute pressure that the water can be reduced to and not have cavitation occur?

Answer 1

P=41.84psi

Step-by-step explanation:

Cavitation is a phenomenon that arises when the pressure of a liquid fluid reaches the vapor pressure, this means that if at any point in a system of pipes and pumps the water pressure is equal to or less than the vapor pressure it begins to evaporate, producing explosive bubbles that can cause damage and noise in the system.

Therefore, for this problem, all we have to do is find the water vapor pressure at a temperature of 270F, using thermodynamics tables

Pv@270F=41.84psi