Model and Simulation of Delivery Valves of Plate, Ball and Half Ball Models in Hydram Pump

A hydram pump is a simple structure, consisting of two moving parts, namely a waste or impulse valve and a delivery valve. The waste valve and pressure valve are the main components of the hydram pump which causes water hammer to trigger the hydram pump work so it is very determining the hydram pump performance. Until now there is only a plate form valve models that are commonly used. Based on the constraints of the pressure valve being damaged quickly, then in previous studies several new pressure valve models have been made namely in the form of membranes, spheres and bullets (half-ball). Based on the trials of making and testing hydram pumps that have been done, the ball valve pressure models provide the best pump performance, and vice versa the valve model has the lowest plate performance. However, in its implementation, adjusting this valve still requires a long time, because there is no reference to determine the dimensions of the hydram pump valve such as diameter, valve mass, and adjustment of the valve stride length. The results of tests on hydram pump systems that have been operating in the field show that the ratio of the diameter of the valve disc and the diameter of the hydram pump sewage valve house has a significant effect on the performance of the hydram pump. The most optimal diameter ratio is 0.8. The pressure of the compressive valve affects the resulting pumping discharge and the total efficiency of the hydram pump system. The ball model compressive gravity of a ball around 14 Newton (1.43 Kg) produces the best pumping discharge and total efficiency of the hydram pump system. This gravity is equivalent to the effective pressure force of the pump drive water supply. The initial pressure of the air in the compressed tube affects the resulting pumping discharge and the total efficiency of the hydram pump system. The greater the pressure in the tube will result in pumping discharge and the total efficiency of the hydram pump system which gets smaller, because the compressibility of air in the tube gets smaller. This means that the greater the volume of the air tubes will be able to increase the performance of the hydram pump system.