Over the last century, the need for more environmentally friendly concepts has increased in various industrial sectors. In the field of hydraulics, there is a growing interest in alternative, cleaner working media such as water, which has been used since early civilizations. Since water is a more demanding pressure medium, the development of new technologies is necessary. It is important that we use non-corrosive materials that do not react with water and that products are designed to be easy to manufacture so that they can compete with oil-hydraulic components in terms of cost. One of the basic hydraulic components are flow control valves such as throttle valves and orifices, which may be or may not be adjustable and may be one- or two-way. In this thesis, we will discuss the advantages and disadvantages of water as a pressure medium, the differences between different flow control valves and within given specifications, design and evaluate water hydraulically adjustable, sharp-edge orifice, that allow the free flow of water in one direction and control it in another. The development process includes the design of various conceptual solutions and their evaluation, the creation of the final assembly with the complete technical documentation of the valve and the overview of its components. The flow conditions across the valve are also presented and evaluated.
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