503 200 1001 Nexus stainless steel buffer tank NBT 50L/WM-C4 with top sensor, AISI 304 tank, Energy Label A and 4 heating connections for heat pump and HVAC systems.
The Nexus Stainless Steel Buffer Tank NBT 50L/WM-C4 With Top Sensor is a compact 50 litre AISI304 stainless steel buffer tank for heat pump systems, central heating installations and OEM or project-based HVAC applications.
The buffer tank increases system water volume, improves hydraulic stability and helps reduce frequent heat pump cycling through its anti-pendulum buffer function.
With Energy Label A and CFC-free rigid PU insulation, the vessel helps limit standby losses while keeping stored heat available for heating demand.
The 4-connection layout gives installers flexible options for flow, return, sensor placement and hydraulic integration in compact technical rooms.
Technical data — Nexus Stainless Steel Buffer Tank NBT 50L/WM-C4 With Top Sensor
| General | |
| Product type | OEM stainless steel buffer tank |
| Rated volume | 50 L |
| Actual volume | 50 L |
| Application | Heat pump / central heating / anti-pendulum buffer function |
| Installation type | Vertical, wall-mounted / floor-standing |
| Connection layout | 4 connections with top sensor tube |
| Height [mm] | 620 |
| Tilt height [mm] | 778 |
| ØD Outer diameter [mm] | 470 |
| Ød Inner diameter [mm] | 370 |
| Insulation | CFC-free rigid PU foam |
| Insulation thickness [mm] | 50 |
| Outer casing | Frosted metal, light black |
| Warranty | 3 years |
| Tank | |
| Tank material | Stainless steel AISI 304 |
| Max. operating / test pressure | 6/10 bar |
| Max. tank temperature [deg C] | 95 |
| Connections | ||||
| H | Height [mm] | 620 | ||
| ØD | ØD Outer diameter [mm] | 470 | ||
| Ød | Ød Inner diameter [mm] | 370 | ||
| H | DN 14 | G 3/4" | P&T safety valve | 620 |
| B | DN 3 | G 1" | Connection (inlet / outlet) | 441 |
| F | DN 9 | G 1" | Connection (inlet / outlet) | 441 |
| D | DN 7 | G 3/4" | Sensor pocket (12.7 mm) | 620 |
| A | DN 4 | G 1" | Connection (inlet / outlet) | 195 |
| E | DN 8 | G 1" | Connection (inlet / outlet) | 195 |
| G | DN 2 | G 1/2" | Drain port | 33 |
| Safety notice |
| The 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 where applicable - Nexus expansion vessel for heating systems The required expansion vessel capacity must be calculated according to the total system volume and operating conditions. |