This example model shows how Foundation Library thermal liquid components can be used to estimate the impact of viscous losses on an actuating system's temperature over a long time scale. A double-acting cylinder is actuated periodically and the pressure losses within the custom directional valve add heat to the flow. The conductive heat transfer through the cylinder casing provides a heat sink. The competition between the source and the sink results in a steady temperature established after about 10 minutes. The pressure relief valve limits the pressure inside the system.