203 200 1028 Nexus stainless steel anti-cycling buffer tank BT-25/WM SMALL-C2 for heat pump and HVAC systems, designed to add system volume and reduce short cycling.
The stainless steel buffer tank BT-25/WM SMALL-C2 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-25 WM-C2
| General | |
| Product type | Stainless steel buffer tank |
| Rated volume | 25 L |
| Actual volume | 25 L |
| Application | Heat pump and heating systems / anti-cycling buffer and thermal storage |
| Installation type | Wall-mounted / floor-standing |
| Connection layout | 2 connections for volumizer / anti-cycling buffer use |
| Height [mm] | 582 |
| Tilt dimension [mm] | 684 |
| Outer diameter [mm] | 360 |
| Inner diameter [mm] | 260 |
| Insulation | CFC-free rigid PU foam |
| Insulation thickness [mm] | 50 |
| Outer casing | Frosted metal, light grey |
| Weight [kg] | 8 |
| Warranty | 3 years |
| Tank | |
| Tank material | Stainless steel AISI 304 |
| Max. operating / test pressure | 6/10 bar |
| Max. tank temperature [°C] | 95 |
| Connections | ||||
| H | Height | 582 mm | ||
| ØD | Outer diameter | 360 mm | ||
| Ød | Inner diameter | 260 mm | ||
| A | DN 1 | G 1" | Connection (inlet / outlet) | 0 mm |
| H | DN 3 | G 1" | Connection (inlet / outlet) | 582 mm |
| C | DN 5 | G 3/4" | Sensor / Air Valve | 291 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. |