DIY hydraulics guides

Velocity and pressure drop in hydraulic hose and pipe

Friction between the hydraulic fluid flowing through a hydraulic hose, tube or pipe and its inside wall causes losses, which are quantified as pressure drop. Pressure drop is influenced by a number of factors including the velocity of the fluid through the conductor, which is dependent on flow rate and cross sectional area.

Velocity and pressure drop are important considerations for fluid power designers especially in systems where long hose or pipe runs are necessary. This document contains practical information that includes recommended fluid velocities for hydraulic systems, flow/velocity nomograms and formulas for calculating velocity and pressure drop.

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