Simons supplies the Aquasystem range of diaphragm expansion tanks.
We carry a full stock of tanks from 8 litres to 600 litres with smaller sizes also available in the flat (pancake) version (7, 8, 12lt only).
All the tanks of are manufactured, tested, checked and certified by our Aquasystem . Once the tank is connected to the system, the temperature increases, and with it also increases the water volume which starts to fill the membrane. The water volume keeps expanding until the maximum working temperature is reached. At this stage the membrane occupies almost all the space inside the tank. The pressurized air cushion avoids any contact between water and the internal surface of the tank.