Expansion vessel (diaphragm) CIMM ERE 24L for central heating, 24 L, 1.5/3.5 bar, -10 to +100°C

Diaphragm expansion vessel CIMM ERE 24L for central heating is designed for closed central heating systems to absorb thermal expansion and stabilize system pressure. With a nominal volume of 24 litres and an adjustable precharge from 1.5 to 3.5 bar, the vessel works across an operating temperature range from -10 to +100°C. The compact steel tank with an internal elastomer diaphragm separates the heating medium from the precharged gas chamber, providing consistent pressure compensation and protecting pumps, valves and pipes from pressure spikes.

Advantages

The CIMM ERE 24L offers dependable pressure control for small to medium heating installations without requiring additional space or complex fittings. The diaphragm design prevents waterlogging and reduces corrosion risk, while the wide operating temperature range allows use in most residential and commercial central heating circuits. Its factory-set precharge can be adjusted to match system requirements, improving system efficiency and longevity.

Suitable for

• Closed central heating systems in residential buildings
• Small to medium commercial heating circuits
• Boiler and hydronic heating installations requiring pressure compensation
• Replacement or retrofit projects for existing expansion vessels

Key specifications

• Nominal volume: 24 litres
• Precharge (adjustable): 1.5–3.5 bar
• Operating temperature range: -10 to +100°C
• Vessel type: diaphragm (elastomer membrane) expansion tank
• Application: closed central heating systems

How to use

Install the expansion vessel on the return line or at a location recommended by the heating system designer, ensuring correct orientation and secure mounting. Match the precharge pressure to the static system pressure before commissioning: depressurize the system if necessary, measure static pressure at the filling valve and adjust the vessel precharge accordingly. After installation, purge air from the system and check for leaks. Periodic checks of precharge and visual inspection of mounting points are advisable to ensure continued performance.

Usage recommendations

For reliable operation, set the vessel precharge slightly above the system’s cold static pressure and perform annual inspections. Avoid installing the vessel in locations exposed to freezing temperatures below the specified range or to aggressive chemicals. When replacing an existing vessel, verify nominal volume and precharge compatibility with the system to maintain correct pressure management.