Expansion Vessel CIMM ERE 50 L for Central Heating; Pressure 1.5/6 bar; Temperature -10…+100°C

The CIMM ERE 50 L diaphragm expansion vessel is designed for closed central heating systems to compensate for thermal expansion of the heating medium. With a nominal capacity of 50 litres and an operating temperature range from -10 to +100°C, this expansion vessel stabilizes system pressure, reduces pressure fluctuations and protects pumps, valves and boiler components in residential and light commercial installations.

Advantages

This expansion vessel uses a durable diaphragm to separate the air cushion from the heating fluid, ensuring reliable hydraulic compensation and minimizing the risk of waterlogging. The specified working pressure range of 1.5–6 bar accommodates typical central heating circuits, while the compact vertical design simplifies installation in plant rooms or service cupboards. Materials and construction are selected to provide corrosion resistance and long service life under normal operating conditions.

Suitable for

• Closed central heating systems in single-family homes
• Small multi-family dwellings and light commercial heating circuits
• Systems requiring hydraulic compensation for temperature-related volume changes

Key specifications

• Nominal capacity: 50 L
• Working pressure range: 1.5–6 bar
• Operating temperature range: -10…+100°C
• Diaphragm-type vessel with separated air cushion
• Vertical compact body suitable for indoor installation

How to use

Install the expansion vessel on the return line or at the hydraulic connection point recommended by the heating system designer, following local regulations and manufacturer's installation instructions. Pre-charge the air side to the required static pressure before commissioning and verify system pressure when cold. Periodically check the pre-charge and inspect connections for leaks; perform maintenance or replacement of the diaphragm if operational signs indicate loss of air cushion or waterlogging.

Usage recommendations

Verify compatibility with system volume and maximum allowable pressure before selecting the vessel. Ensure correct mounting orientation and accessible service isolation valves. For optimal performance, match the pre-charge pressure to the system cold pressure and schedule periodic inspections to confirm integrity and pre-charge levels.