Layers - buffer storage with 2 heat exchangers

Layered buffer storage PLCRR

Product overview

The SPSRR stratified buffer storage tank is a versatile hot water storage tank for heating, solid fuel and solar thermal systems, as well as combined heat and power plants. It was developed to ensure optimized stratification of temperature zones and efficient heat exchange.

Construction and materials

The tank and integrated smooth-tube heat exchangers are made of high-quality S235JRG2 steel and comply with DIN 4753 and EN 12897. The heat exchangers are securely welded into the storage tank, ensuring stability and durability.

The storage tank sits on a base ring; the interior of the tank is unfinished, while the exterior is primed black. The maximum operating pressure of the tank is 5 bar; it also features two sockets for electric heating elements.

Layer technology and heat exchangers

For improved stratification, stratification channels and an integrated stratification plate are incorporated into the storage tank. These measures ensure that return flow rates from the heating circuits are directed precisely and temperature zones are clearly separated.

Integrated smooth tube heat exchangers at the top and bottom allow for the simultaneous and efficient use of solar thermal energy and heating systems, thereby increasing system flexibility.

Connections and assembly

The 90° angled socket arrangement facilitates assembly and simplifies the electrical and hydraulic connection of multiple buffer tanks. This significantly simplifies installation in complex systems.

Easy installation is further supported by the robust construction and the provided connections for electric heating elements, making retrofitting straightforward.

Overview of insulation options

The storage tank is available in various insulation options: 100 mm EPS (efficiency class C), 130 mm EPS AirPor® (efficiency class B), and 150 mm PU super rigid foam (efficiency class A) for tank sizes from 600 to 1000 liters. Each version comes with a matching plastic casing and sealing strip.

EPS AirPor® grey insulation

EPS AirPor® insulation combines polystyrene foam with graphite nanoparticles, thereby increasing heat reflection and reducing heat loss. Typical features include up to 30% less heat loss compared to conventional insulation and a thermal conductivity of 0.0316 W/mK according to DIN EN 12667.

The insulation is lightweight, stable, 100% recyclable, and quick to install. Efficiency class B is achieved with 130 mm insulation thickness (110 mm EPS + 20 mm fleece) and 150 mm lid insulation; efficiency class C corresponds to 100 mm insulation thickness (80 mm EPS + 20 mm fleece) and 100 mm lid insulation.

PU super rigid foam insulation

The PU super rigid foam insulation offers excellent insulating properties with a thermal conductivity of 0.023 W/mK according to DIN EN 12667. The design comprises 150 mm PU plus 10 mm PV fleece lamination and a silver-grey PS jacket (RAL 9006) with a clamping strip.

The insulation is removable, making it particularly easy to install in all temperature conditions. The fleece lamination reduces convection losses at the container walls, lid, and fittings; the solution is environmentally friendly, skin-friendly, and recyclable.

Advantages & Areas of application

The SPSRR combines robust construction, efficient layer technology, and flexible insulation options to reduce operating costs and increase system efficiency. Its permanently welded heat exchangers and optimized connections make it an attractive choice for both new construction and retrofitting.

Typical applications include heating systems, solid fuel systems, solar thermal systems and combined heat and power plants, where clear temperature stratification, low heat losses and durable construction are required.

Scope of delivery

• Stratified storage tank with 2 heat exchangers of your choice
• including selected insulation
• Assembly & Operating instructions