As a device to store the hydraulic oil, dissipate the excessive heat from the fluid, to condition the oil and supply it to the downstream components, the hydraulic tank is regarded as a multi-functional system in a hydraulic circuit. An appropriate design with the right installation of subsystems such as filters and indicators is critical to ensure a flawless operation of the hydraulic system. The air bubbles in the hydraulic flows, either through the leaks or due to the meta-stability of the fluid, not only produce the noise and vibrations, but also reduce the system’s efficiency and damage the components via stress corrosion. Deaeration of hydraulic tanks is therefore an absolute necessity.

In this work, the air bubbles in the return line flow is separated from the oil in a hydraulic tank using special meshes...