A blockage or restriction such as a clogged filter or part-closed valve mounted on the inlet to the pump can cause it. What causes cavitation in pumps?Ĭavitation in pumps is caused by excessively low pressure at the pump inlet. The most well-known locations, aside from pumps, are ships’ propellers, control valve seats and small-bore orifice plates in water pipework. Virtually anywhere that water is moving fast. Because cavitation takes place on the entry to a pump, the first system component that the bubbles encounter is the pump impeller. Because of the large number of bubbles formed in a cavitating system, these bubbles of water vapor can cause extensive damage to system components over time. The collapse of the bubble and the energy released creates a small pressure jet that can strike a nearby solid surface, potentially damaging it. The answer is in the release of latent heat energy of condensation when the water vapor returns to its liquid phase. One aspect of cavitation that is not widely understood is why these apparently harmless bubbles are so destructive when they implode. How does cavitation damage system components? Cavitation has been described as sounding like gravel or coffee beans in the system. Does a pump sound differently when it cavitates? Here are some common questions and answers that relate to cavitation. In the simplest possible terms, cavitation involves the formation of water vapor bubbles that damage metal components when they collapse back to the liquid phase. Despite it being an ever-present threat, it is not well understood. Cavitation is a condition that can affect any fluid flow system.
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