Automatic Control Valves are valves that open, close and adjust with the pressure of mains water. The power that moves the flapper is provided by the area of the diaphragm or piston in the actuator being greater than the flapper area by a certain ratio. The opening of the flapper is adjusted by the ratio of the working pressure acting on the actuator or piston. This adjustment is provided by hydraulic valves called pilot. Establishment of hydraulic balance in water distribution networks is very important for the efficient operation of the network. With ESVANA adjustable pressure reducing valves, high inlet pressures are reduced to the desired pressure and given to the system. Pressure reducing valves can be connected one after the other to reduce the pressure to the desired pressure. Efficient operation of the system is ensured. In order to prevent cavitation in pressure reducing valves, the ratio of inlet and outlet pressures should not exceed 1.5 + 1 or 2 + 1. (If the input is 10 bar, the output should be at least 6.6 bar or 5 bar). The cavitation resistance of the valve is increased with enlarged body structure, V-Port pluggable control valve, stainless steel valve seat.