Multifunctional pressure expansion vessel - 5l; 10bar; 3/4" IVAR.DP 5 - MULTIFUNCTIONAL

Product detailed description

This expansion vessel is commonly used in residential and commercial heating systems to accommodate thermal expansion of water when heated. It is typically installed in closed systems such as central heating circuits and hot water storage units. The vessel ensures stable pressure levels and prevents overpressure situations that could damage the system. It is suitable for both horizontal and vertical mounting options depending on space constraints and system design.

Installers working on boiler systems, solar water heaters, or heat pump circuits will find this vessel suitable for applications where temperature fluctuates between -10°C and 99°C. The recommended maximum operating temperature is 90°C, making it ideal for standard heating systems but not for high-temperature industrial processes. The vessel is compatible with systems that require a sealed expansion solution, and its design supports integration with pressure relief valves and filling devices.

Technical parameters

Installation and connection

Before installation, ensure the system is depressurised and drained. Mount the vessel in a location accessible for inspection and maintenance, either horizontally using the suspension option (IVAR.DP) or vertically with a base (IVAR.DPV). Connect using a 3/4 inch threaded inlet with a stainless steel hexagonal fitting. Tighten the connection using a wrench, ensuring the seal remains intact. Avoid overtightening to prevent damage to the threads or internal components. Check for proper orientation of the membrane and ensure the vessel is not subjected to direct mechanical stress from adjacent components. A common mistake during installation is incorrect orientation, which can lead to premature membrane failure.

Compatibility and accessories

This vessel is designed for integration with pressure relief valves, differential pressure switches, and system filling devices. It is compatible with standard heating systems using water as the heat transfer medium. For complete system functionality, additional components such as pressure gauges and manual air vents may be required depending on local regulations and system complexity. No related products are listed in the database.

Technical background for designers

The operating principle involves the separation of water and air by a fixed butyl membrane, which expands or contracts in response to thermal changes in the system. The butyl material provides resistance to oxidation and maintains structural integrity over time. The internal water chamber is coated with an anti-corrosion layer, enhancing durability in closed systems. The stainless steel inlet improves resistance to wear and ensures a secure connection. The vessel’s performance depends on correct pre-charge pressure settings and system compatibility. Longevity is affected by exposure to temperatures beyond 90°C, mechanical stress, and improper sealing during installation.

Service and operation

Periodic checks should include verifying the pre-charge pressure and inspecting for signs of leakage or corrosion around the inlet and membrane. No specific service intervals are provided in the technical documentation. If the vessel shows signs of reduced performance or visible damage, it should be replaced. During routine maintenance, ensure the system pressure remains within the recommended range to avoid overloading the vessel. No additional service parts are specified in the brief.

Frequently asked questions

Can this vessel be used in systems with temperatures above 90°C?
No, the recommended maximum operating temperature is 90°C. Prolonged exposure to higher temperatures may reduce membrane lifespan.

Is the membrane replaceable?
No, the membrane is fixed and not designed for replacement. If damaged, the entire vessel must be replaced.

What is the function of the stainless steel inlet?
The stainless steel inlet with hex head provides a durable and leak-resistant connection point for piping and system components.

Can this vessel be mounted in any orientation?
It is available in two mounting variants: IVAR.DP for horizontal suspension and IVAR.DPV for vertical mounting with a base. Choose based on system layout and space availability.