Expansion Vessel Reflex N 18, 4 bar / 70°C, grey

Reflex N 18 expansion vessel for closed heating and cooling systems, designed to absorb thermal expansion and stabilise system pressure. The compact grey vessel is rated for a maximum working pressure of 4 bar and a maximum operating temperature of 70°C. It is intended to protect system components from overpressure and to reduce frequent pressure relief events in domestic and small commercial installations.

Advantages

The Reflex N 18 provides reliable pressure compensation in compact form, minimising pressure fluctuations and reducing stress on pumps, valves and heat generators. Its design supports straightforward integration into existing systems and offers durable performance within the specified temperature and pressure limits. The grey finish and compact dimensions facilitate installation in confined spaces often found in residential plant rooms.

Suitable for

• Domestic central heating systems
• Small commercial heating installations
• Closed cooling circuits with similar operating conditions
• Boiler and heat pump installations requiring pressure buffering

Key specifications

• Nominal volume: 18 litres
• Maximum working pressure: 4 bar
• Maximum operating temperature: 70°C
• Colour: grey
• Type: expansion vessel for closed systems

How to use

Install the expansion vessel in a location that allows access for maintenance and pressure checking. Connect the vessel to the system at a suitable tapping point, ensuring correct orientation and secure fittings. Pre-charge the vessel to the recommended pre-charge pressure for the system, then commission the system and adjust the vessel pre-charge if necessary to achieve stable operating pressure. Follow standard installation practice for closed heating and cooling systems and use appropriate isolation and safety devices.

Usage recommendations

Regularly inspect the vessel for corrosion, physical damage and correct pre-charge pressure. Verify the system pressure during different operating states and adjust pre-charge pressure to match static system pressure. Replace the vessel if the diaphragm shows signs of failure or if the vessel no longer maintains the correct pressure range.