Reducing the Pressure Range and Creating a Compression Layers by Installing Pressure Relief Valves

Distribution network is the most important part of the water supply system. Accidents and leaks in distribution networks are always the concern of ABFA companies. Reducing accidents and wastage by hydraulic parameters such as pressure management is of particular importance. One of these methods is that the pressure head. In network nodes, they should be as close as possible to the minimum standard head. To do this, the pressure range should be reduced, which is done by creating a new isotherm layer and zoning with the help of pressure reducing valve installation, according to scientific theories by reducing accident pressure. And waste will also be reduced. After reviewing the reservoirs of District 3 in terms of the number of accidents in the 94 reservoir in Tehran with the highest number of accidents was selected as the study area with WaterGems software and GIS information, this reservoir was modeled in the software. After validating the model using data. The compressed pressures of the reservoir network were investigated and analyzed. 53 percent of the nodes had a pressure of more than 6 atmospheres, in which pressure range wasted and accidents are expected. In order to modify the network, the proposed plan to increase the isothermal layer was done with the scenario of installing 4 pressure relief valves for the network. In order to isolate the model, 13 limit valves were also considered. According to scientific findings, reducing accidents and leaks can be achieved by reducing pressure.