Description
IBO C.W.U. 50 BASIC Diaphragm Expansion Vessel
IBO C.W.U. BASIC diaphragm expansion vessels are expansion tanks designed for hot and cold water installations, used to maintain and balance pressure resulting from changes in water volume. As the manufacturer, we design the C.W.U. BASIC series with a butyl diaphragm and a carbon steel body coated with epoxy paint, ensuring durable and reliable operation in water systems. The series is available in capacities from 5 to 50 liters.
Who it is for
- Water and plumbing installation companies – we supply tested, ready-to-install components for hot and cold water installations, with complete Dambat technical documentation.
- Sanitary installation designers – we offer vessels with documented pressure and capacity parameters, making system selection and planning easier.
- Wholesalers and technical stores – we enable you to expand your product range with the economical C.W.U. diaphragm vessel series, available in a wide range of capacities.
- Service technicians and maintenance departments – we provide vessels covered by a 24-month manufacturer’s warranty and supported by Dambat’s authorized service center.
Applications
- Maintaining and balancing pressure in hot and cold water installations – compensating for changes in water volume resulting from heating.
- Operation in installations filled with glycol mixtures at a maximum concentration of 50%.
- Protecting water systems in residential buildings, commercial facilities, and industrial installations.
- Cooperation with pumps and pressure systems requiring certified devices compliant with Directive 2014/68/EU.
Features, description, and technical data
The IBO C.W.U. BASIC series by Dambat includes diaphragm expansion vessels for hot and cold water installations, available in capacities from 5 to 50 liters. High-quality materials and quality control at every stage of production ensure consistent parameters and long-term device service life.
The vessel body is made of thick carbon steel coated with anticorrosion varnish and an external powder epoxy coating, providing durable surface protection. A butyl diaphragm is installed inside the steel shell; it is characterized by high tensile strength and very low gas permeability. The diaphragm completely separates the water from the compressed air cushion, protecting the steel body against internal corrosion.
A sealed valve (car tire valve) is located in the rear section of the vessel, under the cover, for checking and adjusting the pre-charge pressure using a standard compressor. The vessels meet the requirements of Pressure Directive 2014/68/EU.
IBO C.W.U. BASIC series parameters:
- Diaphragm: YES – butyl
- Gas permeability: very low
- Body: carbon steel coated with anticorrosion varnish and powder epoxy paint
- Compliance: PED Pressure Directive 2014/68/EU
- Approved media: water, glycol mixtures with a concentration of up to 50%
Detailed technical data for individual models, including pre-charge pressure, operating pressure, dimensions, and weight, is available in the manufacturer’s technical documentation. Warranty: IBO – 24-month (2-year) manufacturer’s warranty. Dambat is the only authorized service provider.
Frequently asked questions (FAQ) – IBO C.W.U. BASIC diaphragm expansion vessels
What are IBO C.W.U. BASIC diaphragm expansion vessels used for?
IBO C.W.U. BASIC diaphragm expansion vessels are designed for hot and cold water installations to maintain and balance pressure resulting from changes in water volume. The butyl diaphragm separates the water from the air cushion, stabilizing the operation of the entire system and protecting it against sudden pressure surges.
How does the IBO C.W.U. BASIC series differ from the IBO C.O. BASIC series and GBV tanks?
IBO C.W.U. BASIC vessels are designed for hot and cold water installations and feature a butyl diaphragm. The IBO C.O. BASIC series consists of vessels for closed heating and solar installations, with an EPDM diaphragm and a pre-charge pressure of 1.5 bar. GBV tanks, on the other hand, are vertical hydrofor vessels for water supply systems, with significantly larger capacities and a different range of applications.
Where can IBO C.W.U. BASIC diaphragm expansion vessels be purchased?
As the manufacturer, we do not sell directly online. IBO C.W.U. BASIC diaphragm expansion vessels are available from our commercial partners, installation wholesalers, and authorized online distributors cooperating with the Dambat brand.
What is the warranty period and where should service requests be submitted?
IBO C.W.U. BASIC series diaphragm expansion vessels are covered by a 24-month (2-year) manufacturer’s warranty. Dambat is the only authorized service provider – the contact form is available at dambat.pl/pages/serwis.
How do you adjust the pre-charge pressure in IBO C.W.U. BASIC vessels?
A sealed valve (car tire valve) located in the rear section of the vessel, under the cover, is used to adjust the pressure. Pressure is increased or reduced using a standard compressor. The pre-charge pressure should be selected according to the parameters of the specific installation and the Dambat manufacturer’s technical documentation.
Are IBO C.W.U. BASIC vessels suitable for use with glycol?
Yes – IBO C.W.U. BASIC diaphragm expansion vessels are approved for use with glycol mixtures at a maximum concentration of 50%.
What material is the diaphragm in IBO C.W.U. BASIC vessels made of?
IBO C.W.U. BASIC diaphragm expansion vessels are equipped with a butyl diaphragm, a material characterized by high tensile strength and very low gas permeability. The diaphragm permanently separates the water from the compressed air cushion inside the tank.
- Diaphragm: YES,
- Installation position: Vertical/Horizontal,
- Connection: 3/4",
- Pressure gauge: NO,
- Maximum tested pressure: 15.0 bar,
- Pre-charge pressure: 3.5 ±10%,
- Operating pressure: 10.0 bar,
- Operating temperature: from 0°C to 99°C,
- Dimensions: Ø35/55 cm,
- Weight: 7.6 kg,
MATERIALS
• Body: Carbon steel coated with lacquer,
• Diaphragm: Butyl.
Download: IBO_CWU_BASIC_PL-EN_instrukcja.pdf
Download: GARAN_Prawny_obowiazek_zapewnienia_zgodnosci_towaru_z_umowa.pdf
IBO C.W.U. 50 BASIC Diaphragm Expansion Vessel
IBO C.W.U. BASIC diaphragm expansion vessels are expansion tanks designed for hot and cold water installations, used to maintain and balance pressure resulting from changes in water volume. As the manufacturer, we design the C.W.U. BASIC series with a butyl diaphragm and a carbon steel body coated with epoxy paint, ensuring durable and reliable operation in water systems. The series is available in capacities from 5 to 50 liters.
Who it is for
- Water and plumbing installation companies – we supply tested, ready-to-install components for hot and cold water installations, with complete Dambat technical documentation.
- Sanitary installation designers – we offer vessels with documented pressure and capacity parameters, making system selection and planning easier.
- Wholesalers and technical stores – we enable you to expand your product range with the economical C.W.U. diaphragm vessel series, available in a wide range of capacities.
- Service technicians and maintenance departments – we provide vessels covered by a 24-month manufacturer’s warranty and supported by Dambat’s authorized service center.
Applications
- Maintaining and balancing pressure in hot and cold water installations – compensating for changes in water volume resulting from heating.
- Operation in installations filled with glycol mixtures at a maximum concentration of 50%.
- Protecting water systems in residential buildings, commercial facilities, and industrial installations.
- Cooperation with pumps and pressure systems requiring certified devices compliant with Directive 2014/68/EU.
Features, description, and technical data
The IBO C.W.U. BASIC series by Dambat includes diaphragm expansion vessels for hot and cold water installations, available in capacities from 5 to 50 liters. High-quality materials and quality control at every stage of production ensure consistent parameters and long-term device service life.
The vessel body is made of thick carbon steel coated with anticorrosion varnish and an external powder epoxy coating, providing durable surface protection. A butyl diaphragm is installed inside the steel shell; it is characterized by high tensile strength and very low gas permeability. The diaphragm completely separates the water from the compressed air cushion, protecting the steel body against internal corrosion.
A sealed valve (car tire valve) is located in the rear section of the vessel, under the cover, for checking and adjusting the pre-charge pressure using a standard compressor. The vessels meet the requirements of Pressure Directive 2014/68/EU.
IBO C.W.U. BASIC series parameters:
- Diaphragm: YES – butyl
- Gas permeability: very low
- Body: carbon steel coated with anticorrosion varnish and powder epoxy paint
- Compliance: PED Pressure Directive 2014/68/EU
- Approved media: water, glycol mixtures with a concentration of up to 50%
Detailed technical data for individual models, including pre-charge pressure, operating pressure, dimensions, and weight, is available in the manufacturer’s technical documentation. Warranty: IBO – 24-month (2-year) manufacturer’s warranty. Dambat is the only authorized service provider.
Frequently asked questions (FAQ) – IBO C.W.U. BASIC diaphragm expansion vessels
What are IBO C.W.U. BASIC diaphragm expansion vessels used for?
IBO C.W.U. BASIC diaphragm expansion vessels are designed for hot and cold water installations to maintain and balance pressure resulting from changes in water volume. The butyl diaphragm separates the water from the air cushion, stabilizing the operation of the entire system and protecting it against sudden pressure surges.
How does the IBO C.W.U. BASIC series differ from the IBO C.O. BASIC series and GBV tanks?
IBO C.W.U. BASIC vessels are designed for hot and cold water installations and feature a butyl diaphragm. The IBO C.O. BASIC series consists of vessels for closed heating and solar installations, with an EPDM diaphragm and a pre-charge pressure of 1.5 bar. GBV tanks, on the other hand, are vertical hydrofor vessels for water supply systems, with significantly larger capacities and a different range of applications.
Where can IBO C.W.U. BASIC diaphragm expansion vessels be purchased?
As the manufacturer, we do not sell directly online. IBO C.W.U. BASIC diaphragm expansion vessels are available from our commercial partners, installation wholesalers, and authorized online distributors cooperating with the Dambat brand.
What is the warranty period and where should service requests be submitted?
IBO C.W.U. BASIC series diaphragm expansion vessels are covered by a 24-month (2-year) manufacturer’s warranty. Dambat is the only authorized service provider – the contact form is available at dambat.pl/pages/serwis.
How do you adjust the pre-charge pressure in IBO C.W.U. BASIC vessels?
A sealed valve (car tire valve) located in the rear section of the vessel, under the cover, is used to adjust the pressure. Pressure is increased or reduced using a standard compressor. The pre-charge pressure should be selected according to the parameters of the specific installation and the Dambat manufacturer’s technical documentation.
Are IBO C.W.U. BASIC vessels suitable for use with glycol?
Yes – IBO C.W.U. BASIC diaphragm expansion vessels are approved for use with glycol mixtures at a maximum concentration of 50%.
What material is the diaphragm in IBO C.W.U. BASIC vessels made of?
IBO C.W.U. BASIC diaphragm expansion vessels are equipped with a butyl diaphragm, a material characterized by high tensile strength and very low gas permeability. The diaphragm permanently separates the water from the compressed air cushion inside the tank.

