A water pressure reducing valve (PRV valve) measures the pressure of the discharge side of the valve. Its task is to hold the set pressure constant.
If pressure increases on the discharge side, the valve closes. When the pressure decreases on the discharge side, the valve will open, ‘topping off’ so to speak, keeping the pressure constant.
When using Grundfos Hydro MPC systems, we do not recommend using pressure reducing valves. Instead, the building should be divided into zones for optimal comfort and lower energy consumption.
When using roof tanks, pressure reducing valves can be necessary. Otherwise, the pressure will be too high at the lowest apartments.