Multifunctional pressure expansion vessel - 150l; 10bar; 5/4" IVAR.DPV 150 - MULTIFUNCTIONAL

Product detailed description

Expansion vessels are essential components in closed heating and plumbing systems, where they accommodate thermal expansion of water to prevent overpressure. This model is commonly used in residential and commercial buildings with central heating systems, including underfloor heating and solar thermal installations. Installers often integrate such vessels into systems with circulators, boilers and heat exchangers to ensure stable pressure and prevent damage to piping and fittings.

Proper sizing and selection of an expansion vessel depend on system volume, operating pressure and temperature range. The vessel must be dimensioned to handle the maximum expected expansion of the system fluid without exceeding its pressure rating. In systems with multiple heat sources or large storage tanks, the vessel must be sized accordingly to maintain hydraulic balance and prevent pressure fluctuations.

Technical parameters

Code	A2C2L43
Brand	IVAR

The 150L capacity and 10bar pressure rating indicate the vessel's ability to manage thermal expansion in systems with moderate to high water volume. The 5/4 inch connection ensures compatibility with standard piping in heating and plumbing systems. The operating temperature range from -10°C to +99°C allows use in a wide range of environments, with the recommended maximum operating temperature at 90°C.

Installation and connection

The vessel should be installed in a location that allows for easy access for maintenance and inspection. It is typically mounted vertically or horizontally, depending on the model variant (IVAR.DP for suspended mounting, IVAR.DPV for vertical mounting with base). The 5/4 inch connection requires a compatible fitting with a hexagonal nut for secure installation. Ensure that the vessel is connected to the system after the pressure-reducing valve and before the circulation pump to avoid pressure surges. Common installation errors include incorrect orientation, which can affect the vessel’s performance, and failure to bleed air from the system before commissioning.

Compatibility and accessories

This expansion vessel is compatible with systems using water as the heat transfer medium and is suitable for integration with pressure-reducing valves, safety valves and circulation pumps. For complete system functionality, installers may need to order additional components such as pressure gauges, air vents and mounting brackets. Related products include other expansion vessels from IVAR with different capacities and connection sizes.

Technical background for designers

The vessel operates by separating the water and air chambers using a butyl membrane, which is resistant to thermal cycling and chemical degradation. The antikorozivny butyl coating on the water side prevents corrosion and prolongs the vessel’s service life. The stainless steel inlet with hexagonal nut ensures a durable and leak-free connection. The vessel is designed to comply with the EU pressure equipment directive 97/23/ES and carries CE marking for conformity. The operating principle ensures that the vessel maintains a stable pressure by compensating for thermal expansion without the need for frequent recharging.

Service and operation

Routine checks should include verifying the pressure in the air chamber and ensuring that the membrane is intact. If the vessel shows signs of overpressure or reduced performance, it may require recharging or replacement. No specific service intervals are provided in the brief, but regular visual inspections are recommended to detect leaks or corrosion. The vessel should be isolated from the system before any maintenance work is carried out to ensure safety.

Frequently asked questions

Can this vessel be used in solar thermal systems?
Yes, it is suitable for solar thermal systems provided the operating temperature does not exceed 90°C and the system pressure remains within the 10bar limit.

Is the vessel compatible with glycol-based heat transfer fluids?
According to the manufacturer's technical data sheet, compatibility with glycol-based fluids should be verified separately.

Can the vessel be mounted in a confined space?
Yes, the IVAR.DP variant is designed for suspended mounting, making it suitable for installation in tight spaces where floor space is limited.

What is the maximum allowable operating temperature?
The recommended maximum operating temperature is 90°C, as specified in the technical description.