Expansion vessel for Domestic Hot Water IBAIONDO 8L

Product detailed description

Expansion vessels are essential components in closed hot water systems, particularly in residential and commercial buildings where water heating systems generate pressure changes. This vessel is commonly installed on the cold or hot side of a domestic hot water (DHW) storage tank to manage pressure variations caused by thermal expansion. The unit is designed for use in systems with fixed pressure limits and requires careful integration to ensure system stability and safety.

Typical applications include DHW systems in single-family homes, apartment blocks, and small commercial buildings. The vessel is installed in a location accessible for inspection and maintenance, with sufficient space for the pressure gauge and valve. It is not intended for use in open systems or high-pressure industrial applications. The vessel is compatible with systems operating within the specified temperature and pressure ranges and should be selected based on the system's expansion requirements.

Technical parameters

Type	Expansion vessel for domestic hot water
Volume	8 l
Max. working pressure	10 bar
Pre-charge pressure	3 bar
Operating temperature	-10°C to +100°C
Membrane	Fixed EPDM
Material	Steel with powder coating, wall thickness 1 mm
Colour	White
Connection	3/4 inch
Net weight	1.920 kg
Warranty	2 years
EAN	5900308748732
Code	NP.CWU.08.IB
Brand	Hydroland

The 8L capacity is suitable for systems with moderate expansion volumes, ensuring that pressure remains within safe limits during heating cycles. The maximum working pressure of 10 bar and initial pressure of 3 bar are critical for system design, as they determine the vessel's ability to absorb pressure fluctuations. The operating temperature range of -10°C to +100°C allows for use in environments with seasonal temperature variations. The fixed EPDM membrane ensures a durable and reliable separation between air and water compartments.Installation and connection The vessel is connected via a 3/4 inch threaded port, typically using a standard brass or stainless steel coupling. The installation should be carried out in a location that allows for easy access to the pressure gauge and valve. Before installation, the initial pressure should be checked using a pressure gauge and adjusted to 3 bar if necessary. The vessel should be mounted vertically to ensure proper membrane function and prevent air pockets. Common installation mistakes include incorrect orientation, failure to check the initial pressure, and using incompatible fittings that may cause leaks or damage to the vessel.Compatibility and accessories This expansion vessel is compatible with closed DHW systems that operate within the specified pressure and temperature limits. It is designed to be used in conjunction with pressure relief valves and pressure gauges to monitor system performance. The valve is included in the package, but additional fittings such as unions or adapters may be required depending on the system configuration. No specific related products are required for this model, but system designers should ensure that the vessel is part of a complete pressure management solution.Technical background for designers The vessel operates by separating air and water using a fixed EPDM membrane, which allows for expansion and contraction of the water volume without direct contact between the two media. The steel body with powder coating provides corrosion resistance and structural integrity, with a wall thickness of 1 mm ensuring durability under operational conditions. The vessel is integrated into the system to absorb pressure changes caused by thermal expansion, preventing overpressure that could damage other components. The service life and efficiency are influenced by the quality of installation, regular pressure checks, and the absence of chemical contaminants in the water supply.Service and operation The vessel requires periodic inspection to ensure that the initial pressure remains at 3 bar and that the membrane is intact. If the pressure drops below the specified level, it should be adjusted using a suitable pump and pressure gauge. The vessel is not designed for disassembly or cleaning, and any signs of damage or leakage should be addressed by replacing the unit. The manufacturer provides a 2-year warranty, covering defects in materials and workmanship under normal operating conditions.Frequently asked questions

Can this expansion vessel be connected to an open DHW system?
No, the vessel is designed for use in closed systems only. Connecting it to an open system would result in improper pressure management and potential damage to the vessel.

Is the initial pressure adjustable after installation?
Yes, the initial pressure can be adjusted using a pressure gauge and pump. The recommended pressure is 3 bar, and it should be checked periodically to ensure system stability.

Can the vessel be used in systems with higher pressure than 10 bar?
No, the maximum working pressure is 10 bar. Exceeding this limit may cause structural failure and should be avoided by using a pressure relief valve as part of the system design.

What is the recommended installation orientation?
The vessel should be mounted vertically to ensure proper membrane function and prevent air pockets. Horizontal installation may lead to uneven pressure distribution and reduced efficiency.