In this study an experimental study was conducted to investigate of open-loop responses for a proportional cartridge valve. Velocity and displacement data were acquired in reference to the sinusoidal waves at the first stage of the experiment. In the second part a mathematical model was created using MATLAB System Identification Toolbox in Matlab Simulink © environment to state the entire system. Position data of the piston were transferred using LVDT (Linear Variable Differential Transformer) to the Simulink. In conclusion It was clearly seen that results of the theoretic mathematical equation and the transfer function acquired from experimental study was convergent 89.8%.