SPSR stratified buffer storage – Efficient storage solution for heating, solar, and solid fuel systems

Product overview

The SPSR stratified buffer tank is a robustly constructed hot water storage tank for heating systems, solar thermal systems, and combined heat and power plants. It combines a stable tank design with integrated stratified technology and a permanently welded smooth-tube heat exchanger, thus ensuring high system efficiency and reliable stratification of the return flow.

Construction and materials

The tank and bare-tube heat exchanger are made of high-quality S235JRG2 steel in accordance with DIN 4753 and EN 12897. The interior is left unfinished, and the outer shell is primed. The storage tank sits securely on a base ring. The tank is designed for a maximum operating pressure of 5 bar and features two sockets for electric heating cartridges.

Layer technology and heat exchangers

For optimized stratification, stratification channels are integrated into the storage tank, and a stratification plate is welded in. These components reduce mixing and improve temperature stratification, thereby increasing the usable heat quantity. The permanently welded smooth-tube heat exchanger ensures efficient heat exchange for solar and heating circuits.

Connections and ease of installation

The 90° angled connection arrangement facilitates the installation and connection of multiple buffer storage tanks. This enables compact system layouts and simple system coupling. The arrangement of the connections and the base ring simplify installation and subsequent maintenance.

Insulation variants – EPS AirPor® grey

The EPS AirPor® gray polystyrene foam insulation is available in 100 mm (efficiency class C) and 130 mm (efficiency class B). The insulation combines EPS with an additional fleece layer and an admixture of graphite nanoparticles, which significantly reduce heat loss through increased heat reflection.

Thanks to its lightweight, precisely fitting construction, the insulation is quick to install, mechanically robust, and 100% recyclable. The overall insulation thicknesses, as well as additional floor and roof insulation, ensure significant energy savings during operation.

Insulation variant – PU super rigid foam

The 150 mm thick PU super rigid foam insulation (for 600–1000 l tanks) combines excellent insulation performance with a RAL 9006 PS jacket and a terminal strip for easy installation. A 10 mm polyester fiber fleece prevents convection losses on the tank wall, lid, and sleeves.

With a thermal conductivity of approximately 0.023 W/mK and efficiency class A, this insulation offers the best insulation performance in the range and is also recyclable and skin-friendly.

Technical data and equipment

The SPSR is equipped with stratification channels, a stratification plate, and a permanently installed smooth-tube heat exchanger. Other features include a raw interior and primed exterior, two sockets for electric heating cartridges, and a design for an operating pressure of up to 5 bar.

Advantages and areas of application

The combination of targeted layering technology, high-quality steel construction, and effective insulation increases the efficiency of heating systems and reduces heat loss. Areas of application include heating systems, solid fuel boilers, solar systems, and combined heat and power plants, as well as combined energy systems that rely on reliable temperature stratification.

Environment, safety and standards

The materials used are environmentally friendly and largely recyclable.The insulation materials meet common fire protection requirements (DIN 4102 B2) and thermal conductivity requirements according to DIN EN 12667, which means that the storage tank meets high safety and ecological standards.

Selection, installation instructions and service

Choose the right storage capacity and insulation variant to suit your system needs; the standardized sleeve arrangement facilitates integration. For optimal performance, professional installation by trained personnel and consideration of connection configurations during system planning are recommended.

Scope of delivery

• Stratified storage tank with 1 heat exchanger of your choice
• including selected insulation
• Assembly & operating instructions