Flamco Flexcon Premium Expansion Vessel 18 Litres 0.5 Bar Red

Belangrijkste kenmerken:

18 liter inhoud
3/4inch aansluiting
Voor cv-installaties
Voor montage met standard expansievat koppelingen
0.5 bar voordruk

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Description

This Flamco Flexcon Premium expansion vessel 18 litres red with 0.5 bar pre-charge pressure and 3/4 inch connection is suitable for sealed central heating systems, underfloor heating, pellet boilers and cooling systems. The expansion vessel absorbs pressure fluctuations and helps prevent overpressure, malfunctions and leaks within heating or cooling installations. This Flamco Flexcon Premium expansion vessel features a high-quality TPO diaphragm, nitrogen filling and a robust steel housing for stable operation and a long service life. Thanks to its maximum working pressure of 3 bar, the vessel is suitable for many common heating systems in residential properties and smaller commercial buildings.

0.5 bar pre-charge pressure

For stable pressure control in sealed systems

For heating and cooling

Suitable for heating, underfloor heating and cooling systems

18 litre capacity

Popular size for standard residential installations

3/4 inch connection

Compatible with standard expansion vessel fittings

Quick explanation
An expansion vessel prevents the pressure in your heating system from becoming too high when the system water expands. The diaphragm separates water and gas, allowing pressure fluctuations to be absorbed and ensuring safe and stable operation.

Quick answer: is this the right expansion vessel?

Yes → if you have a sealed central heating system
Yes → if you need an 18 litre expansion vessel
Yes → if your installation is suitable for 0.5 bar pre-charge pressure
Yes → if you need an expansion vessel with a maximum working pressure of 3 bar
Yes → for many boilers, radiators, underfloor heating systems, cooling systems and pellet boiler installations
No → if you need an expansion vessel for potable water, domestic hot water or solar thermal systems

What does a Flamco Flexcon Premium 18 litre expansion vessel do?

An expansion vessel absorbs the increase in water volume when heating water expands. As water heats up inside a central heating system, it expands. Without an expansion vessel, pressure inside the system could rise excessively, causing the safety relief valve to open or placing unnecessary stress on system components.

The Flamco Flexcon Premium expansion vessel contains a high-quality TPO diaphragm that separates the system water from a gas chamber. As system pressure increases, the diaphragm moves and absorbs the additional volume. When the water cools, the diaphragm returns to its original position, helping maintain a stable system pressure.

Important to know
An expansion vessel must match the volume, installation height and pressure requirements of the system. Always verify that 18 litres, 0.5 bar pre-charge pressure and a maximum working pressure of 3 bar are suitable for your installation.

Want more information about installation or replacement? Visit our dutch knowledge base: Installing and connecting an expansion vessel .

When do you choose a Flamco Flexcon Premium 18 litre expansion vessel?

A Flamco Flexcon Premium 18 litre expansion vessel is a suitable choice when your heating or cooling installation requires a medium-sized expansion volume. This capacity is commonly used in residential heating systems and smaller commercial installations with radiators, underfloor heating or a combination of both.

Suitable for many standard residential heating systems
Popular choice for boiler and radiator installations
Suitable for underfloor heating systems
Suitable for sealed heating and cooling systems
Suitable for pellet boiler installations
Ideal for replacing an existing 18 litre expansion vessel

Practical selection guide
Replacing an existing expansion vessel? Always check the vessel capacity, pre-charge pressure, connection size and maximum working pressure. If these specifications match 18 litres, 0.5 bar, a 3/4 inch connection and a maximum working pressure of 3 bar, this Flamco Flexcon Premium expansion vessel is often a suitable replacement.

What does a 0.5 bar pre-charge pressure mean?

The 0.5 bar pre-charge pressure is the factory-set pressure inside the expansion vessel. This pressure helps maintain the correct balance within the heating or cooling system and should match the installation height and operating pressure of the system.

The correct pre-charge pressure prevents excessive pressure fluctuations. This improves expansion vessel performance, helps maintain system stability and reduces unnecessary stress on components such as the pressure relief valve.

Please note
The required pre-charge pressure depends on installation height and system pressure. If in doubt, consult a qualified installer.

Suitable for which applications?

This Flamco Flexcon Premium expansion vessel 18 litres – 0.5 bar is designed for sealed heating and cooling systems where stable pressure regulation is essential. It is widely used in residential and light commercial installations.

Central heating boilers with radiators
Underfloor heating systems
Pellet boilers and biomass boilers
Sealed heating systems
Sealed cooling systems
Small commercial buildings
Pellet stoves with central heating connection

Looking for installation accessories or replacement parts? Also view our expansion vessel accessories, pipes and tubing and complete expansion vessel range.

Typical application
This expansion vessel is often used as a replacement for an existing 18 litre expansion vessel in homes with central heating systems, underfloor heating, cooling systems or pellet boiler installations.

Installation and connection

The Flamco Flexcon Premium expansion vessel is equipped with a 3/4 inch connection and can easily be connected to standard heating pipework. The standard connection makes it compatible with commonly used accessories such as expansion vessel couplings, wall brackets, mounting consoles and combined mounting sets.

For proper operation, the expansion vessel must be installed correctly and matched to the system pressure requirements. Always verify the pre-charge pressure, installation height, maximum working pressure and condition of existing components.

Important during installation
Before installation, always check the system pressure, pre-charge pressure, connection size and vessel capacity. Professional installation is recommended if you are unsure.

Want to learn more about installation or replacement? Go to our download section.

When should you replace a Flamco Flexcon Premium expansion vessel?

Expansion vessels wear over time. In particular, the diaphragm inside the vessel may eventually fail, preventing the vessel from effectively absorbing pressure fluctuations.

Central heating pressure fluctuates frequently
The pressure relief valve regularly discharges water
You need to refill the system often
The expansion vessel no longer provides counter pressure
You hear knocking or flow noises in the installation

Quick advice
If you are replacing an existing expansion vessel, always verify that the capacity, pre-charge pressure, connection size and maximum working pressure match the original vessel or the requirements of your installation.

Is this Flamco Flexcon Premium 18 litre expansion vessel suitable for your installation?

This expansion vessel is suitable if:

you have a sealed heating system
you have a sealed cooling system
you require an 18 litre vessel
your installation requires 0.5 bar pre-charge pressure
you need a maximum working pressure of 3 bar
you use radiators, underfloor heating or a pellet boiler
you are replacing an existing 18 litre expansion vessel

Choose a different vessel if:

your system requires a different pre-charge pressure
you need a larger or smaller expansion volume
you need an expansion vessel for potable water
you have a solar thermal installation
you are unsure about system volume or pressure requirements

Why choose a Flamco Flexcon Premium 18 litre expansion vessel?

Flamco is recognised worldwide for high-quality expansion vessels used in heating and cooling systems. The Flexcon Premium range is designed to deliver reliable pressure control, long service life and dependable performance.

The combination of a premium TPO diaphragm, nitrogen filling, robust steel housing, 0.5 bar pre-charge pressure, 3 bar maximum working pressure and standard 3/4 inch connection makes this vessel suitable for a wide range of residential and commercial applications.

If you are looking for a reliable Flamco Flexcon Premium 18 litre expansion vessel for radiators, underfloor heating, cooling systems or pellet boiler installations, this model is a durable and practical choice.

Flamco Flexcon Premium technology
The Flamco Flexcon Premium range has been developed for reliable pressure regulation in sealed heating and cooling systems. The advanced TPO diaphragm offers extremely low gas permeability, helping maintain the vessel's pre-charge pressure for longer. Combined with nitrogen filling and durable construction, this results in outstanding long-term performance.

Order your Flamco Flexcon Premium 18 litre expansion vessel
This Flamco expansion vessel is ideal for sealed heating and cooling systems where reliable pressure control is essential. Combine it with suitable mounting accessories and expansion vessel fittings for a complete and professional installation.

Technische specificaties

Article number	16916
EAN nummer	8712874169166
Brand	Flamco
Model	expansion vessel
Diameter	256 mm
Thread type	BSP (G-thread)
Thread size	3/4 inch
Max operating temperature	0°C to 70°C
Peak temperature	70 °C
Max operating pressure	3 bar
Certification	ce
Application	Heating
Collecties 2	Central heating expansion vessels
Height	405 mm
Pre charge pressure	0.5 bar
Volume	18 liter
Material	Steel TPO
Nominal diameter	DN20
Color	Red
Finish	Epoxy-coated steel
Thread connection	External thread