Volano CUBE - Wall-Mounted Buffer Tank with Hydraulic Separator

Cordivari’s Volano CUBE is a compact, wall-mounted buffer tank with an integrated hydraulic separator, engineered specifically for modern heat pump and hydronic heating/cooling systems. By combining a buffer tank and separator in one unit, it simplifies piping, reduces short cycling, and helps stabilize system temperatures—all while hanging neatly on the wall beneath, or next to, your boiler or heat pump.

Volano CUBE is available in 50 L (≈ 13 gal) and 80 L (≈ 21 gal) models, in either mild steel (GBL) or stainless steel (XBL), so you can match volume and material to the size and demands of each project.

Why installers choose Volano CUBE

Wall-hung design – Mounts directly on the wall to free up floor space and create clean, organized mechanical rooms. Ideal under wall-hung boilers and heat pumps.

Built-in hydraulic separator – Internally separates generator and distribution circuits so heat pump and terminal flow rates are decoupled, protecting pumps and simplifying balancing.

Patented thermal stratification – Patented internal geometry promotes temperature layering (stratification), improving comfort and overall system efficiency in both heating and cooling mode.

Heat-pump ready – Designed for hot or cold water applications, with operating limits tailored to modern reversible heat pumps.

Construction & insulation

Materials:
– GBL models: Durable mild steel tank body for reliable hydronic service.
– XBL models: Corrosion-resistant stainless steel tank body for long service life, especially in more aggressive water or coastal environments.

Exterior: Metal sheet cladding with special anti-corrosion treatment, suitable for indoor or protected outdoor installation.

Insulation: High-density, ecological polyurethane foam minimizes standby losses and keeps stored water at a stable temperature. In cooling mode, the rigid foam adheres closely to the tank, helping prevent warm air from reaching cold surfaces and eliminating condensation issues.

Mounting: Supplied with wall-mount brackets for secure, simple installation.

Technical details (all Volano CUBE models)

Nominal volumes:
– 50 L (≈ 13 US gallons)
– 80 L (≈ 21 US gallons)

Max working pressure: 6 bar (≈ 87 psi)

Max working temperature: 95 °C (≈ 203 °F)

Connections: 8 lateral ports for easy connection of up to two generators (e.g., heat pump + boiler) and two types of terminals (high- and low-temperature circuits).

Service connections: 4 dedicated ports for sensors, gauges, and safety/control devices.

Applications: Hydronic heating and cooling systems, heat pump buffer tanks, boiler + heat pump hybrid systems, and projects where compact wall-hung installation and hydraulic separation are required. Stainless XBL models are ideal where additional corrosion resistance is desired.

Warranty

Backed by a 5-year manufacturer’s warranty (see Cordivari general terms and conditions for details).

Choose the 50 L (13 gal) Volano CUBE for smaller systems or tighter mechanical rooms, or the 80 L (21 gal) model when you need more thermal storage. Select GBL (mild steel) or XBL (stainless steel) to match your water quality, environment, and project requirements—all with the same integrated separation and patented stratification that reduce short cycling, simplify piping, and elevate the quality and reliability of your hydronic installs.