Features

• Capacity: 12 litres
• Colour may vary
• Expansion vessel for water heaters and any type of pump s

Advantages

Hy-Pro expansion tanks are equipped with interchangeable membranes to ensure a long life, with a stainless steel flange (galvanized on 2 litre) making the majority of the tanks suitable for use with aggressive water.

Working

The membrane guarantees that air and water do not mix, eliminating the possibility of water logging through loss of air to the system. In a hot water system, the increase in water volume due to the increase in temperature, is absorbed by the expansion vessel. When the water temperature decreases, the pre-charge pressure of the vessel presses the air cushion and forces the water back into the system.

In a potable water system, when the pump starts, water enters the membrane using the whole capacity of the tank. When the pressure in the chamber reaches the maximum system pressure, the pump stops working. The tank is filled to its maximum capacity. When water is needed again, pressure in the air side will push water into the system. In both applications the system maintains the pressure, helping to reduce energy consumption.

Zilmet 12 Litre Portable Expansion Vessel Z1-11H0001202 The HY-PRO expansion tanks are equipped with an interchangeable membrane to assure long life. The galvanised flange incorporates an interior polypropylene section making it more suitable for use with aggressive water. The tank has no corners in which sediment can be trapped.