Model Development of Delivery Valves Through Stagnation Point Displacement To Improve Performance of Hydraulic Ram Pump

Hydram pump (hydraulic ram) is a simple structure, consisting of two moving parts, namely a waste valve (waste valve or impulse valve) and a pressure valve (delivery valve). The mechanism of action of the sewage and pressure relief valves is utilized in the hydram pump cycle. The waste valve mainly affects the amount of impulse force generated, while the pressure valve influences the amount of pumping discharge. This pumping discharge is not optimal because the flow of water through the pressure valve faces many flow obstacles, especially on the valve seat. So that the pumping water flow is not optimal, because the stagnation point of the flow of water under the valve is not in the pressure valve flow hole. Therefore the pressure valve design needs to be modified by adding a reducer under the pressure valve seat to direct or move the flow stagnation point to the pressure valve flow hole. For this reason, the Doctoral Dissertation Research will be tested with a pressure valve with variations in the tilt angle of the valve seat holder. From several fluid flow indicators such as pressure and flow velocity as well as the performance of the test results show that the compressed valve with the valve housing design of the valve forming a slope angle of 60° is the best design to produce the best performance of the hydram pump system. This shows the stagnation point of flow through the valve valve most directionally directed at a design with an angle of 60°. This new design provides a significant performance improvement compared to the old design in the form of flat plates.