Expansion vessel VAREM LR 8L, capacity 8 L, connection 3/4" GAS, max pressure 6 bar

The VAREM LR 8L expansion vessel is an 8-liter pressure vessel designed for closed heating and domestic hot water systems. It features a 3/4" GAS threaded connection and a maximum operating pressure of 6 bar. The vessel is intended to absorb thermal expansion and pressure fluctuations in compact boiler circuits, small water heaters and circulation loops, helping to protect piping, valves and appliances from overpressure-related stress.

Advantages

The vessel provides compact and reliable pressure buffering in confined installations, with a corrosion-resistant shell and a factory-specified pre-charge that allows quick installation and immediate operation. Its 3/4" GAS connection simplifies integration with common heating fittings, and the 8 L capacity is suitable for small systems where space and weight are limited.

Suitable for

• Small domestic boilers and compact heating units
• Domestic hot water heaters and indirect cylinders
• Circulation circuits and closed-loop systems in apartments or small houses
• Systems requiring a compact pressure buffer with up to 6 bar maximum working pressure

Key specifications

• Volume: 8 litres
• Connection type: 3/4" GAS threaded coupling
• Maximum operating pressure: 6 bar
• Application: closed heating and domestic hot water systems
• Design: diaphragm/pressurized expansion vessel for pressure absorption

How to use

Install the expansion vessel on the system return or a suitable branch using the 3/4" GAS threaded connection, following local regulations and the heating system manufacturer’s instructions. Ensure the vessel pre-charge matches the static system pressure or adjust the air valve accordingly before final commissioning. Position the vessel so it is accessible for inspection and pressure checks. After installation, bleed air from the system and verify the operating pressure does not exceed 6 bar during normal operation.

Usage recommendations

For reliable performance, check the vessel pre-charge periodically and inspect for visible damage or corrosion. If the system requires a different pre-charge or a larger buffer volume, select a vessel sized to the system’s expansion volume. Always follow applicable safety standards and consult a qualified technician for installation and maintenance.