The membrane separates the water from the walls of the vessel, prevents corrosion and contamination of the installation and stabilizes the pressure. The first time the tank is connected to the system, the hydrophore pump is started, the pressure increases and the water fills the membrane.
When the pressure reaches its maximum value, the pump stops. At that point the tank contains the maximum amount of water. The diaphragm expands and occupies almost the entire volume of the tank. When water is drawn, it starts to flow out of the tank without the need for the pump to operate, using the air cushion pressure.
The process continues, the diaphragm shrinks and the pressure drops to a minimum. The diaphragm returns to its original size the pump restarts and a new cycle begins. Since the tank always ensures maximum water flow, the pump’s operating periods are reduced to a minimum.