The paper presents the results of calculations of the regression model of hydraulic losses of technological equipment, in particular, the gate pump SV1-25, which is used in the practice of laboratory research of hydraulic equipment (GЕ) as part of the educational process at the Department of Theoretical Mechanics, Mechanical Science and Robotic Systems of NAU "KHAI". The task of the work was to establish the nature and actual hydraulic losses depending on the hydraulic load. According to the obtained data, in turn, the goal was to establish a mathematical model of the dependence of losses on the load of the public utility. In the course of conducting a number of experiments with a successive increase in the hydraulic load, the flow rate of the working fluid and the hydraulic power of the system were recorded; power losses and hydraulic efficiency of the system were calculated. As a result of the experiment, the nonlinear theoretical, namely, the parabolic dependence of the losses on the load, which is described by parabolic regression with a looseness of the model that does not exceed 4%, was confirmed. The obtained mathematical model of losses can be used in the future to build a complete structural model of the GЕ and a detailed analysis of the factors that determine the occurrence of its power losses. The mathematical model of losses of real equipment obtained in the course of experimental research can be added to the already existing model of the GЕ for the purpose of non-linear correction of its efficiency under variable hydraulic load in real conditions of use. During the calculation of the mathematical model, some stages of mathematical modeling were simplified, namely: models with a higher degree of polynomial were not considered (that is, the type of regressive dependence was not changed), the significance of the obtained coefficients was not characterized by their dispersion when the external conditions of the application of the GЕ were changed. The use of the powerful mathematical CAD Sim Hidraulics (MATLAB) provides an opportunity to simplify the process of designing the latest hydraulic automation systems, taking into account the studied dependencies.