Ibaiondo 500 CMF 1" Membrane Expansion Vessel

The Ibaiondo 500 CMF expansion vessel, reference 04500351, is designed to absorb fluid volume variations in closed heating and HVAC systems. It has a capacity of 500 liters, a maximum operating pressure of 6 bar, and a bottom connection of 1 inch.

Its vertical format with legs makes floor installation easy and is especially suitable for high-capacity systems. The tank is made of steel, incorporates a fixed non-replaceable diaphragm, and includes a charging valve for checking and adjusting the precharge pressure.

500-liter expansion vessel for heating and HVAC

During the operation of a heating or HVAC system, temperature changes cause variations in the volume of the fluid in the circuit. The expansion vessel absorbs these variations and helps keep system pressure within the values specified for the installation.

The Ibaiondo 500 CMF model is specifically intended for closed circuits. Its 500-liter capacity makes it suitable for installations where a high expansion volume is required, always according to the sizing carried out for each system.

Maximum operating pressure of 6 bar

The vessel is designed to operate at a maximum operating pressure of 6 bar. During manufacturing, it is subjected to a test pressure of 9 bar, in accordance with Ibaiondo specifications.

The factory precharge pressure is 1.5 bar, and the gas used for precharge is air. This pressure must be checked and, when necessary, adjusted according to the characteristics of the installation before commissioning.

Fixed non-replaceable diaphragm

The 500 CMF incorporates a non-replaceable diaphragm in accordance with EN 13831. The diaphragm separates the circuit fluid from the precharged air chamber and allows compensation for the volume variations that occur during system operation.

This model is intended for heating and HVAC installations, and its diaphragm is classified by the manufacturer as not suitable for drinking water. Therefore, it should not be confused with expansion vessels specifically designed for domestic hot water systems.

1-inch bottom connection

The hydraulic connection is located at the bottom of the vessel and has a size of 1 inch. This configuration allows the tank to be integrated into the circuit while respecting the hydraulic layout and the corresponding installation instructions.

The vessel also includes a charging valve, which allows the air chamber pressure to be checked and the necessary maintenance operations to be carried out.

Vertical construction with legs

The Ibaiondo 500 CMF features a vertical design with support legs, intended to be placed directly on a stable surface. This format is especially practical for large-capacity tanks, as it provides stability and facilitates hydraulic connection from the lower area.

The body is made of steel and has an exterior finish with red paint, characteristic of the CMF range for heating and HVAC.

Dimensions of the Ibaiondo 500 CMF

The expansion vessel has an approximate diameter of 750 mm and a total height of 1,445 mm. Its weight is approximately 63 kg.

These dimensions should be taken into account when selecting the installation location, leaving the necessary space for installation, connection, and subsequent maintenance operations.

Temperature range

According to Ibaiondo's technical data sheet, the vessel is designed to operate in systems with temperatures between -10 and 100 degrees Celsius, within the pressure and operating conditions established by the manufacturer.

Manufactured in accordance with pressure equipment regulations

The Ibaiondo 500 CMF expansion vessel is manufactured in accordance with Directive 2014/68/EU on pressure equipment. The CMF range also has certification for expansion vessels designed according to EN 13831.

Ibaiondo provides a 3-year warranty for this range, in accordance with the manufacturer's current technical documentation.

Technical features of the Ibaiondo 500 CMF

• Brand: Ibaiondo.
• Reference: 04500351.
• Model: 500 CMF.
• Product type: diaphragm expansion vessel.
• Application: closed heating and HVAC systems.
• Capacity: 500 liters.
• Maximum operating pressure: 6 bar.
• Test pressure: 9 bar.
• Factory precharge pressure: 1.5 bar.
• Precharge gas: air.
• Diaphragm: fixed and non-replaceable.
• Diaphragm standard: EN 13831.
• Suitable for drinking water: no.
• Water connection: 1 inch.
• Connection position: bottom.
• Tank material: steel.
• System temperature: between -10 and 100 degrees Celsius.
• Diameter: 750 mm.
• Height: 1,445 mm.
• Weight: approximately 63 kg.
• Installation: vertical on legs.
• Charging valve: included.
• Exterior finish: red paint.
• Manufacturing directive: 2014/68/EU.
• Manufacturer warranty: 3 years.

Large-capacity expansion vessel for closed circuits

With its 500-liter capacity, maximum pressure of 6 bar, and vertical construction with bottom connection, the Ibaiondo 500 CMF is especially designed for heating and HVAC installations that require a large-volume expansion vessel.

Its steel body, fixed diaphragm, 1.5 bar factory precharge, and dimensions of 750 mm in diameter by 1,445 mm in height complete a solution specifically designed to control fluid expansion in large closed circuits.