Mecalia DPI/DIM 80-Liter Wall-Mounted Buffer Tank

The Mecalia DPI/DIM wall-mounted buffer tank 80 liters, reference 06930, is designed to store cold or hot water in closed primary circuits for heating and HVAC installations. Made of AISI 304 stainless steel, it has an 80-liter capacity, a working pressure of 6 bar, and a vertical wall-mounted format that helps make better use of the available space in the technical room.

This buffer tank can be integrated into installations powered by a heat pump, aerothermal system, solar energy, or boiler, providing additional water volume to the hydraulic circuit. Its 80-liter capacity is especially useful in HVAC systems that need to increase the available water volume without resorting to a large tank.

Important: the Mecalia DPI/DIM is intended exclusively for technical water in a closed primary circuit and is not suitable for direct storage of domestic hot water (DHW).

80-liter wall-mounted buffer tank

The Mecalia DPI/DIM 80 offers a nominal capacity of 80 liters and belongs to Mecalia's range of buffer tanks made of AISI 304 stainless steel.

Its wall-mounted installation configuration allows it to be fixed vertically on a wall, avoiding the use of valuable floor space. This feature makes it easy to integrate into homes, technical rooms, and plant rooms where available space may be limited.

According to the official Mecalia 2025 price list, reference 06930 has dimensions of 450 mm in diameter and 950 mm in height.

Made of AISI 304 stainless steel

The tank body is made of AISI 304 stainless steel, a material used by Mecalia in its range of buffer tanks intended for closed heating and HVAC circuits.

The tank is designed to store technical water, both hot and cold, allowing it to be used in installations that operate exclusively in heating and in reversible systems capable of providing cooling as well.

Especially suitable for aerothermal systems and heat pumps

The Mecalia DPI/DIM buffer tank can be part of installations with a heat pump or aerothermal system, increasing the volume of water available in the hydraulic circuit.

Having an additional water volume may be necessary to adapt the installation to the hydraulic requirements of the generator and distribution circuits. The tank acts as an element for storing thermal energy within the primary circuit.

Its 80-liter capacity provides an intermediate volume between the 50- and 100-liter wall-mounted models in the same range.

Suitable for heating and cooling

The Mecalia DPI/DIM 80 is designed for the storage, heating, or cooling of primary circuit water. For this reason, it can be used in both heating installations and hydraulic cooling systems.

Possible applications include:

• Aerothermal installations.
• Systems with a heat pump.
• Heating hydraulic circuits.
• HVAC and cooling installations.
• Systems with water chillers.
• Installations powered by a boiler.
• Solar energy systems.
• Circuits that require an increase in their buffer water volume.

Working pressure of 6 bar

The Mecalia DPI/DIM range is designed to operate at a service pressure of up to 6 bar, allowing integration into different closed hydraulic heating and HVAC installations.

During the design and assembly of the system, both the maximum pressure allowed by the tank and the operating conditions of the rest of the installation components must be respected.

Operating temperature from -10 to 90 °C

Mecalia's technical documentation specifies an approximate operating temperature range of -10 to 90 °C for AISI 304 stainless steel buffer tanks.

This wide range makes it possible to use the tank with hot water for heating or with cold water in HVAC installations, always respecting the requirements of the fluid and the rest of the components when operating at temperatures below 0 °C.

Injected polyurethane thermal insulation

The tank includes thermal insulation made of injected rigid polyurethane foam, designed to reduce heat exchange between the stored water and the outside environment.

Mecalia specifies for this range an approximate thermal conductivity of λ = 0.022 W/m·°C and a density of 45 to 50 kg/m³. The insulation used is also HCFC-free.

This insulation helps preserve the temperature of the stored water, both when the tank operates in a heating circuit and when it is part of a cooling system.

Four threaded hydraulic connections

Mecalia buffer tanks in this range with capacities of up to 500 liters include four female threaded connections for hydraulic connections.

This layout allows the tank to be integrated into different installation configurations, connecting it to the thermal generator and distribution circuits according to the designed hydraulic scheme.

Not suitable for domestic hot water

The Mecalia DPI/DIM 80 is a buffer tank for closed circuits, not a potable water storage tank.

Mecalia expressly states that this range is not suitable for DHW. The stored water belongs to the technical heating or HVAC circuit and must not be used directly for human consumption.

Wall-mounted format to save space

One of the main features of reference 06930 is its wall-mounted configuration. Unlike the DPI/DI tanks intended for floor installation, the 80-liter DPI/DIM can be installed vertically on a wall.

With dimensions of Ø 450 x 950 mm, it provides an 80-liter storage volume while keeping the technical room floor free.

This solution is especially interesting in residential aerothermal installations, renovations, and technical rooms where available space influences the choice of hydraulic components.

Technical specifications of Mecalia 06930

• Brand: Mecalia.
• Reference: 06930.
• Model: DPI/DIM 80.
• Type: buffer tank.
• Installation: vertical wall-mounted.
• Nominal capacity: 80 liters.
• Material: AISI 304 stainless steel.
• Application: cold or hot primary circuit water.
• Operation: closed circuit.
• Suitable for DHW: no.
• Working pressure: 6 bar.
• Operating temperature range: -10 to 90 °C.
• Diameter: 450 mm.
• Height: 950 mm.
• Hydraulic connections: four female threaded connections.
• Insulation: injected rigid polyurethane foam.
• Thermal conductivity of insulation: λ = 0.022 W/m·°C.
• Insulation density: 45-50 kg/m³.
• HCFC-free insulation: yes.
• Compatible with heat pump: yes.
• Compatible with aerothermal systems: yes.
• Compatible with boiler: yes.
• Compatible with solar energy: yes.
• Suitable for cooling circuits: yes.

Mecalia buffer tank for heating and HVAC

The Mecalia DPI/DIM wall-mounted buffer tank 80 liters offers a compact solution for increasing the water volume of heating and cooling installations using a closed circuit.

Its construction in AISI 304 stainless steel, 6 bar working pressure, polyurethane thermal insulation, and compatibility with heat pumps, boilers, and solar energy systems make it suitable for a wide variety of thermal installations.

Thanks to its 80-liter capacity and wall-mounted installation, it allows a considerable buffer volume to be incorporated without taking up useful floor space, making it especially practical in aerothermal and HVAC installations with small technical rooms.