Multifunctional pressure expansion vessel - 8l; 10bar; 3/4" IVAR.DP 8 - MULTIFUNCTIONAL

Product detailed description

Expansion vessels are essential components in closed heating and plumbing systems, where thermal expansion of water must be accommodated safely. This model is commonly used in residential and commercial buildings, including underfloor heating systems, central heating units, and domestic hot water circuits. Installers typically integrate it into systems where pressure fluctuations need to be controlled, ensuring stable operation and preventing damage to pipework and components. The vessel is designed for use in environments with variable temperatures and is suitable for both horizontal and vertical mounting configurations.

Its compact size and robust construction make it ideal for installations where space is limited. The vessel is compatible with a range of system types, including those with circulating pumps and thermal storage units. It is particularly useful in systems where frequent pressure changes occur, such as in systems with frequent on/off cycles or those with variable load demands. The vessel’s design ensures long-term reliability and minimal maintenance, making it a preferred choice for professional installers.

Technical parameters

Code	A2C2L16
Brand	IVAR

The 8L capacity is suitable for systems with moderate expansion requirements, while the 10bar pressure rating ensures compatibility with high-pressure systems. The 3/4 inch connection size is standard for many European plumbing and heating applications. The operating temperature range of -10°C to +99°C allows the vessel to function in a wide range of environments, although the recommended operating temperature is up to 90°C. These parameters are critical for proper system sizing and selection, ensuring the vessel can handle the expected thermal expansion and pressure conditions.

Installation and connection

Installation should be carried out by a qualified technician to ensure correct positioning and secure connections. The vessel is available in two mounting options: horizontal (IVAR.DP) with a suspension system, and vertical (IVAR.DPV) with a base for floor mounting. The 3/4 inch connection requires a compatible pipe thread, and the stainless steel feed thread with hexagonal shape ensures a secure and durable connection. Before installation, the system should be depressurised, and the vessel’s membrane should be checked for integrity. Common installation errors include incorrect orientation, failure to secure the vessel properly, and connecting it to a system with incompatible pressure levels.

Compatibility and accessories

This expansion vessel is designed to be used with standard heating and plumbing systems that require pressure regulation. It is compatible with a range of pressure-reducing valves, safety valves, and pressure switches. For complete system integration, additional components such as pressure gauges, air vents, and isolation valves may be required. Installers should ensure that all components are correctly sized and compatible with the vessel’s pressure and temperature ratings. No specific related products are mentioned in the brief.

Technical background for designers

The vessel operates on the principle of separating the water expansion chamber from the air chamber using a butyl membrane. This design prevents direct contact between the water and the vessel’s internal surfaces, reducing the risk of corrosion and extending the service life. The butyl membrane is fixed and sealed, ensuring long-term stability. The vessel is constructed with an anti-corrosion butyl-coated water chamber, which is a patented feature. The stainless steel feed thread provides durability and resistance to wear. The vessel’s integration into a system depends on the system’s expansion volume and pressure dynamics. Factors such as system size, temperature fluctuations, and pump characteristics can influence the vessel’s performance and longevity.

Service and operation

Regular inspection is recommended to ensure the vessel remains in good working condition. Key checkpoints include the integrity of the membrane, the tightness of the connections, and the overall pressure stability of the system. No specific service intervals are provided in the brief, but any signs of leakage or pressure loss should be investigated promptly. The vessel is designed for long-term use with minimal maintenance, provided it is installed correctly and operated within its specified parameters.

Frequently asked questions

Can this vessel be used in a domestic hot water system?
Yes, it is suitable for systems with operating temperatures up to 90°C, making it appropriate for domestic hot water applications.

Is the vessel compatible with a 3/4 inch BSP thread?
Yes, the 3/4 inch connection is standard and compatible with BSP thread systems.

Can the vessel be mounted vertically?
Yes, the IVAR.DPV model is designed for vertical mounting with a base for secure installation.

What is the maximum pressure the vessel can handle?
The vessel is rated for up to 10bar, making it suitable for high-pressure systems.