IBO ITALY CO 5 diaphragm expansion vessel – expansion vessel for central heating systems
The IBO ITALY CO 5 diaphragm expansion vessel has a 5 l capacity and is designed for central heating systems. It absorbs the thermal expansion of water and stabilizes system pressure, limiting fluctuations as the system heats up and cools down. It contains a replaceable EPDM diaphragm that separates the heating water from the gas cushion.
Who it’s for
-
Heating system installers – the 3/4" connection and replaceable EPDM diaphragm make installation and subsequent servicing easier in a closed central heating system.
-
Homeowners with a boiler or furnace – the vessel absorbs the increase in water volume as it heats up, maintaining stable system pressure.
-
Higher-pressure heating systems – the design, rated for up to 10 bar and temperatures from −10 to 100°C, is suitable for demanding closed-loop systems.
-
Technical servicing – the replaceable EPDM diaphragm lets you restore the vessel’s functionality without replacing the entire unit.
Applications
The IBO ITALY CO 5 diaphragm expansion vessel absorbs the thermal expansion of water in a closed central heating system, maintaining stable pressure and limiting fluctuations caused by the increase in water volume as it heats up.
It is used in domestic and commercial heating systems, as well as solar systems operating with heating water or a glycol solution. The IBO ITALY CO 5 diaphragm expansion vessel can be installed vertically or horizontally.
Features of the IBO ITALY CO 5 diaphragm expansion vessel – description and technical specifications
The vessel body is made of steel coated with an exterior protective lacquer that improves corrosion resistance. A replaceable diaphragm made of synthetic EPDM rubber, resistant to stretching and elevated temperatures, is fitted inside the steel shell. The diaphragm separates the heating fluid from the compressed gas cushion, limiting contact between the water and the inside of the body.
The vessel is supplied with a factory pre-charge pressure of 1.5 bar ±10%, which can be adjusted to suit the specific system. It is compatible with closed heating systems with a maximum working pressure of 10 bar and a fluid temperature from −10 to 100°C.
- Type: diaphragm expansion vessel for central heating
- Brand: IBO ITALY
- Capacity: 5 l
- Diaphragm: replaceable, EPDM
- Pre-charge pressure: 1.5 bar ±10%
- Max. working pressure: 10 bar
- Max. test pressure: 15 bar
- Connection: 3/4"
- Operating temperature: from −10 to 100°C
- Installation position: vertical or horizontal
- Weight: 1.4 kg
IBO ITALY – 36 months (3 years) manufacturer's warranty. Warranty and post-warranty service is provided by Dambat.
Dambat – a trusted manufacturer of pumps and hydrotechnical equipment with quality certifications.
Frequently asked questions (FAQ) – IBO ITALY CO 5 diaphragm expansion vessel
What is the IBO ITALY CO 5 diaphragm expansion vessel used for?
The IBO ITALY CO 5 diaphragm expansion vessel accommodates the thermal expansion of water in a closed central heating system and stabilizes its pressure. W this way, it reduces pressure fluctuations that occur when water expands as it heats up.
How does the IBO ITALY CO expansion vessel differ from the C.O. BASIC version?
The IBO ITALY CO expansion vessel operates at a higher working pressure (10 bar) and across a wider temperature range (from −10 to 100°C). It can be installed vertically or horizontally and comes with a 36-month warranty. The C.O. BASIC version operates at up to 8 bar and comes with a 24-month warranty. Both have a replaceable EPDM diaphragm.
What is the vessel's pre-charge pressure, and can it be changed?
The factory pre-charge pressure is 1.5 bar ±10%. It can be adjusted to match the system's static pressure by adding or releasing gas through the valve on the vessel connection, with the system isolated and depressurized.
How do I install the IBO ITALY CO 5 diaphragm expansion vessel?
The vessel can be installed vertically or horizontally, with a 3/4" connection, usually on the system return line. An isolation valve is recommended to allow servicing without draining the entire system, along with checking the pre-charge pressure before startup.
Where can I buy the IBO ITALY CO 5 diaphragm expansion vessel?
The manufacturer does not sell directly. The IBO ITALY CO 5 diaphragm expansion vessel is available from retail partners, plumbing wholesalers, and authorized online distributors.
What warranty does the IBO ITALY CO 5 diaphragm vessel have?
The IBO ITALY CO 5 diaphragm vessel is covered by a 36-month (3-year) manufacturer's warranty. Dambat provides warranty and post-warranty service.
