Nexus BT 50 litre wall-mounted buffer tank made from AISI 304 stainless steel, with anti-cycling buffer function, PU insulation and light black frosted metal outer casing for heat pump and heating systems.
The RVS Buffertank BT-50/WM-C4/ Black is a stainless steel buffer tank for heat pump systems, central heating installations and professional HVAC applications. It increases system volume, helps reduce cycling and supports more stable hydraulic operation.
The tank is manufactured from stainless steel AISI 304 and designed for long-term use in technical installations. The combination of stainless steel, PU insulation and practical connection options makes this model a durable buffer solution for installers.
With Energy Efficiency Class A, the high-quality PU insulation helps reduce heat loss, keeps stored heat at temperature for longer and supports lower energy consumption in heat pump and heating systems. This makes the Nexus stainless steel buffer range an efficient choice for reliable thermal storage, buffer volume and long-term energy savings.
By adding buffer volume, the heating system can operate more smoothly. This supports stable flow, less frequent start-stop operation of the heat source and reliable long-term system performance.
Technical data — BT-50 WM-C4 Black
| General | |
| Product type | Stainless steel buffer tank |
| Rated volume | 50 L |
| Application | Heat pump and heating systems / anti-cycling buffer and thermal storage |
| Installation type | Wall-mounted / floor-standing |
| Connection layout | 4 side connections |
| Height [mm] | 636 |
| Tilt dimension [mm] | 762 |
| Outer diameter [mm] | 420 |
| Inner diameter [mm] | 350 |
| Insulation | CFC-free rigid PU foam |
| Insulation thickness [mm] | 50 |
| Outer casing | Frosted metal, light black |
| Weight [kg] | 15 |
| Warranty | 3 years |
| Tank | |
| Tank material | Stainless steel AISI 304 |
| Max. tank pressure [bar] | 6 |
| Max. tank temperature [°C] | 95 |
| Connections | ||||
| H | Height | 636 mm | ||
| ØD | Outer diameter | 420 mm | ||
| Ød | Inner diameter | 350 mm | ||
| H | DN 14 | G 1/2" | P&T safety valve | 636 mm |
| A | DN 4 | G 1" | Connection (inlet / outlet) | 175 mm |
| B | DN 3 | G 1" | Connection (inlet / outlet) | 461 mm |
| E | DN 7 | G 1/2" | Sensor pocket 1 (12.7 mm) | 175 mm |
| E | DN 8 | G 1" | Connection (inlet / outlet) | 175 mm |
| F | DN 9 | G 1" | Connection (inlet / outlet) | 461 mm |
| G | DN 2 | G 1/2" | Drain tap | 33 mm |
| Safety requirements |
| The storage vessel must be protected against overpressure at all times. We recommend installing the following safety accessories: * Safety valve and inlet combination * Nexus sanitary expansion vessel model DS-DSV * Nexus expansion vessel model Nexus ERCE The required expansion vessel capacity must be calculated according to the total system volume and operating conditions. |