In the following work, the development and testing of hydraulic safety relief valve is
discussed. The main goal of the diploma project was to produce a valve that ensures reliable
operation over a wider range of operating conditions than currently available valves on the
market. For the purposes of creating a numerical simulation, the existing testing facility in
the company was used. With a proper analysis we determined initial conditions that returns
similar results but the approach based on selecting the initial pressure in the P-line and piston
displacement x is more efficient. By measuring the actual valve, we found that it is not
possible to achieve an adequate response across the entire operating range. For the
predetermined spring we found that the operation is adequate for pressure settings from 150
bar to 350 bar and flow rates from 5 L/min to 60 L/min. Based on the simulation results, we
concluded that several different springs are needed to cover a larger operating range of the
valve.
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