Nexus PWT 500 litre Duplex 2205 buffer tank with extended connection options with hygienic Duplex 2205 inner tank, anti-cycling buffer function, thermal storage function and electric-boiler-ready design with heating element.
The RVS Buffertank PWT-500 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 Duplex 2205 stainless steel 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.
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 - PWT-500
| General | |
| Product type | Duplex 2205 stainless steel buffer tank / electric boiler-ready vessel |
| Rated volume | 500 L |
| Application | Heat pump and heating systems / anti-cycling buffer, thermal storage and optional electric boiler use |
| Installation type | Vertical floor-standing |
| Connection layout | 8 connections for flexible buffer and storage use |
| Height [mm] | 1828 |
| Tilt dimension [mm] | 1957 |
| Outer diameter [mm] | 700 |
| Inner diameter [mm] | 600 |
| Insulation | CFC-free rigid PU foam |
| Insulation thickness [mm] | 50 |
| Outer casing | Frosted metal, light grey |
| Weight [kg] | 88 |
| Warranty | 5 years |
| Tank | |
| Tank material | Stainless steel Duplex 2205 |
| Max. tank pressure [bar] | 6 |
| Max. tank temperature [deg C] | 95 |
| Connections | ||||
| H | Height | 1828 mm | ||
| ØD | Outer diameter | 700 mm | ||
| Ød | Inner diameter | 600 mm | ||
| H | DN 14 | G 3/4" | P&T safety valve | 1828 mm |
| B | DN 8 | G 1 1/4" | Connection (inlet / outlet) | 1460 mm |
| I | DN 3 | G 1 1/4" | Connection (inlet / outlet) | 1460 mm |
| C | DN 4 | G 1 1/4" | Connection (inlet / outlet) | 1310 mm |
| J | DN 9 | G 1 1/4" | Connection (inlet / outlet) | 1310 mm |
| C | DN 5 | G 1/2" | Sensor pocket 1 (12.7 mm) | 1310 mm |
| D | DN 7 | G 1/2" | Sensor pocket 2 (12.7 mm) | 620 mm |
| L | DN 6 | G 1 1/2" | Electric heating element | 400 mm |
| L | DN 12 | G 1 1/4" | Connection (inlet / outlet) | 400 mm |
| A | DN 13 | G 1 1/4" | Connection (inlet / outlet) | 280 mm |
| K | DN 10 | G 1 1/4" | Connection (inlet / outlet) | 400 mm |
| E | DN 11 | G 1 1/4" | Connection (inlet / outlet) | 280 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. |