As highlighted by Machine Design in the article, “The Importance of Hydraulic Hose Size,” the size of a hydraulic hose plays a critical role in determining flow velocity and system performance. Flow velocity is affected by both the hydraulic pump’s flow rate and the hose’s internal diameter (ID). Changing the hose size without proper consideration can lead to higher flow velocity, which can result in increased pressure, turbulence, and system inefficiencies.

When replacing a hydraulic hose, it’s essential to ensure that the new hose is correctly sized. For example, replacing a hose with a smaller ID forces the same volume of fluid through a restricted space, leading to higher flow velocity. This can cause increased downstream pressure, energy loss, and potentially, overheating of the fluid, which shortens hose lifespan and causes system downtime.

In hydraulic systems, maintaining laminar flow is crucial for minimizing friction and pressure drops. Laminar flow results in a smooth, even flow pattern that maximizes efficiency. Conversely, high flow velocity creates turbulent flow, which disrupts the system, causing pressure drops, increased friction, and higher fluid temperatures.

Additionally, improper hose sizing in suction and return lines can lead to pump cavitation, which over time, will damage the pump. Engineers should carefully evaluate hose sizes to prevent these issues and keep the system operating efficiently.

For manufacturers, proper hydraulic hose sizing ensures a reliable system with fewer breakdowns. 

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Article with all rights reserved, courtesy of machinedesign.com.