Pressure expansion vessel, 8 l, 8 bar, 3/4"

Product detailed description

Pressure expansion vessels are essential components in closed heating and cooling systems. They accommodate thermal expansion of the fluid and maintain system pressure stability. This model is commonly used in residential and light commercial buildings with hydronic heating systems, such as those with gas boilers, radiators, and heat emitters. Installers typically integrate these vessels into systems with circulating pumps and safety valves to ensure safe and efficient operation.

When installing in systems with non-freezing mixtures, it is important to consider the maximum allowable concentration of the mixture to avoid membrane degradation. The vessel is suspended for installation and is suitable for environments with fluctuating ambient temperatures, provided the operating conditions remain within the specified range.

Technical parameters

Diameter	205 mm
EAN	8019742079023
Weight	1.944 kg
Code	A102L16
Brand	IVAR

The vessel has a working pressure rating of 8 bar and a capacity of 8 l, making it suitable for systems with moderate expansion requirements. The 3/4 inch connection ensures compatibility with standard pipe sizes in heating and cooling systems. The operating temperature range from -10 °C to +99 °C allows for use in a wide range of climates and applications, though the recommended operating temperature is up to +80 °C for optimal performance.

Installation and connection

The vessel is installed in the system using a 3/4 inch threaded connection. It should be mounted in a vertical position and suspended using the designated mounting points. The installation location should be accessible for inspection and maintenance. It is important to ensure that the system pressure does not exceed the vessel's maximum pressure rating. Common installation errors include incorrect orientation, failure to check the pre-charge pressure, and neglecting to isolate the vessel for maintenance.

Compatibility and accessories

This vessel is compatible with standard heating and cooling systems that use water or non-freezing mixtures with a maximum concentration of 50%. It is typically used in conjunction with pressure-reducing valves, safety valves, and expansion tanks. No additional accessories are required for basic installation, but system-specific components may be necessary depending on the overall design.

Technical background for designers

The vessel operates on the principle of separating the system fluid from the compressed air using an SBR membrane. As the system heats and the fluid expands, the membrane compresses the air chamber, maintaining system pressure. The SBR material is resistant to common heating system fluids and provides a long service life when used within the recommended temperature and concentration limits. The vessel is designed to comply with EU pressure equipment directive 97/23/EC and is CE marked. The integration into the system should account for the vessel's dimensions (height 300 mm, diameter 205 mm) and the required clearance for maintenance.

Service and operation

Periodic checks are recommended to ensure the vessel's pre-charge pressure remains within the specified range. The membrane should be inspected for signs of wear or damage, particularly if the system uses non-freezing mixtures. No specific service intervals are provided, but the vessel should be replaced if the membrane fails or if the vessel shows signs of structural damage.

Frequently asked questions

Can this vessel be used with non-freezing mixtures?
Yes, it is suitable for use with non-freezing mixtures, provided the concentration does not exceed 50%.

Is the vessel suitable for installation in a basement?
Yes, it can be installed in a basement, provided the ambient temperature remains within the operating range of -10 °C to +99 °C.

Can the vessel be used in a closed-loop cooling system?
Yes, it is suitable for both heating and cooling systems that require expansion management.

Is the membrane available as a replacement part?
No, the membrane is not listed as a separate replacement part in the product documentation.