In this paper, we report on hydraulic characteristics of the particle excitation control valve, which was originally developed for a flow rate control of pneumatic actuators. The orifices are opened and closed with particles excited by the vibration of the orifice plate and the fluid force. This results in more simple and compact structure, and higher flow rate-to-weight ratio than conventional pneumatic valves. Because the traditional hydraulic valves are bulky and heavy, the purpose of this study is the development of a small and lightweight hydraulic valve by applying the working principle of this particle excitation valve to hydraulics. We have focused on two characteristics affected by changing the working fluid from air to oil. One is the vibration of the orifice plate, and the other is the movement of the particles. As a result, it is found that the inertia of the working fluid reduces the vibration velocity of the orifice plate to 24%, and the viscosity of the working fluid raises the operating voltage of the valve to 167% by the influence on the movement of the particles. In addition, when silicone oils are used as working fluid, whose kinematic viscosity values are 1mm²/s, 2mm²/s, and 3mm²/s, maximum volumetric flow rate of the prototype valve are 891ml/min, 887ml/min, and 838ml/min, respectively. These experimental results indicate the potential of the proposed valve for hydraulics.