Hydraulic power transmission is one of the oldest forms of power transmission. Modern hydraulics are used for driving a wide range of machines. With the hydraulic technology control of speed, high forces and torques of linear and rotary movements in combination with highly accurate position and velocity control is possible. For manufacturers, users and service technicians of machines with hydraulic technology it is important to gain insight into the fascinating world of hydraulics.

This Techn...

Hydraulic and lubrication systems have developed significantly in the past sixty years. The range of applications continue to expand. In modern systems, the application of proportional valves is a particularly important stimulus for the application of increasingly complicated and more accurate hydraulic drive systems.

With the availability of more accurate production techniques that enable the possibilities of minimal tolerances, the operating pressures have more than doubled in the last 25 y...