Pressure expansion vessel - water supply systems - 50l; 10bar; 1"; hanging IVAR.AF 50 - AQUACOLD

Product detailed description

Pressure expansion vessels are essential components in closed water systems where thermal expansion must be accommodated safely. This vessel is commonly used in residential and commercial buildings, particularly in central heating and hot water systems. Installers typically encounter these systems during new builds, system upgrades or when replacing aging vessels. The vessel prevents excessive pressure build-up by allowing water to expand into a sealed chamber separated by a flexible membrane.

The device is suitable for potable water applications and must be integrated into the system at a point where water expansion can be effectively managed. It is recommended to install the vessel near the boiler or water heater, ensuring accessibility for inspection and maintenance. Proper orientation is critical—this model is designed for hanging installation to save space and ensure correct positioning of internal components.

Technical parameters

Diameter	400 mm
EAN	8019742002885
Weight	7.461 kg
Code	A052L34
Brand	IVAR

Installation and connection

To install the vessel, first confirm the system is depressurised and isolated. The vessel connects via a 1-inch threaded port, compatible with standard pipe fittings. Secure the vessel using the provided suspension bracket to prevent vibration and misalignment. Ensure the vessel is fully drained before connecting to avoid trapped air. A common mistake is incorrect orientation, which can compromise internal flow dynamics. Always verify that the pressure gauge and pre-charge pressure match the system requirements before commissioning.

Compatibility and accessories

This vessel is compatible with standard potable water systems operating within the specified pressure and temperature range. It requires a pressure-reducing valve and a safety relief valve for full system protection. Additional components such as pressure gauges and isolation valves should be considered depending on the system configuration. No specific accessories are required for this model.

Technical background for designers

The vessel operates on a diaphragm principle, separating the water chamber from the air chamber using a flexible EPDM membrane. This material is selected for its resistance to thermal cycling and chemical stability in potable water environments. The vessel’s internal volume allows for expansion without exceeding the system’s pressure limits. System designers must account for the total volume of water in the circuit and calculate the required vessel size accordingly. Long-term performance depends on maintaining the pre-charge pressure and avoiding exposure to temperatures beyond the specified range.

Service and operation

Routine checks include verifying the pre-charge pressure and inspecting the membrane for signs of wear or leakage. The vessel should be drained periodically to remove sediment and ensure proper function. No scheduled service intervals are specified in the technical documentation. Any irregularities in system pressure or visible damage to the vessel casing warrant immediate inspection.

Frequently asked questions

Can this vessel be used with solar water heating systems?
Yes, it is suitable for systems with water temperatures up to +99°C, provided the installation adheres to the manufacturer's guidelines.

What is the maximum recommended operating temperature?
The vessel is designed for continuous operation up to +80°C, with a short-term tolerance up to +99°C.

Is the membrane replaceable without removing the vessel from the system?
The membrane is replaceable but requires draining and isolating the vessel before removal.

Can this vessel be mounted horizontally?
No, the design specifies a hanging installation to maintain internal flow and pressure balance.