Basotect Foam Provides Thermal Insulation for Hot Water Tanks

Hot water tanks can benefit from the energy-efficient potential of BASF's versatile foam Basotect. The melamine resin foam is increasingly being used as external insulation for tanks made of stainless steel holding up to 500 liters of water. A key factor for this application is the foam's low thermal conductivity of less than 0.035 W/(m*K) and the resulting excellent thermal insulation.

So energy losses can be reduced in the production of hot process water. Another advantage over conventional insulation materials is the BASF material's excellent resistance to temperatures of up to 240°C and its flame retardance (in Germany: B1 according to DIN 4102).

The lightweight Basotect material is cut into wedges and clad with a polystyrene jacket. Thus, flexible insulation shells with all the necessary connection details are produced. With this new system technology the insulation panels completely rest on the wall of the water tank, reducing the chimney effects typical of conventional half-shell insulation and lowering energy losses.

Since the thickness of the flexible foam panels can vary between 50 and 115 mm, the material offers considerable design freedom for fitting different water tanks. It also gives the option of subsequent assembly. In addition, Basotect makes processing and installation easier: it is flexible, fiber-free and can be cut with dimensional accuracy to fit the shape of the tank.

With this combination of properties, Basotect shows its advantages particularly if the hot water tank is part of a solar thermal system. Because the foam is also suitable for insulating the solar collectors on the roof and the heat transfer pipes, it can considerably increase the efficiency of solar thermal systems.

Versatile foam

Basotect is an open-cell foam based on melamine resin with a unique range of properties. Because of the base material it is flame-retardant, abrasive and resistant to high temperatures, keeping its properties over a wide range of temperatures. Its open-cell foam structure makes it lightweight (9 g/l), sound-absorbing, flexible even at low temperatures and heat-insulating. Unlike conventional foams, the different combination of these properties makes it possible to use Basotect as a high-quality solution in a number of energy-efficient applications, with benefits from processing to end use.

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