Expansion Vessel Reflex DE 200 L 10 bar for Domestic Hot Water (c.w.u.) - 7306700

Reflex DE expansion vessel model 7306700 is a 200-litre membrane-type tank designed for domestic hot water (c.w.u.) systems. It absorbs thermal expansion of the water, helps maintain stable system pressure up to 10 bar and reduces cycling and stress on boilers, heat exchangers, pipes and valves. The vessel is intended for installation in residential and light commercial hot water systems where reliable pressure compensation and protection against overpressure are required.

Advantages

The membrane design separates water from the pre-charged gas chamber, preventing corrosion and ensuring consistent performance over time. A robust steel shell and appropriate pre-charge support operation at system working pressures up to 10 bar. The vessel’s 200-litre capacity provides significant buffering for systems with notable thermal expansion, reducing pump cycling and minimizing pressure fluctuations. Designed for domestic hot water applications, this expansion vessel is compatible with standard hot water installation layouts and helps protect system components.

Suitable for

• Domestic hot water systems in single-family homes and multi-family buildings
• Light commercial hot water installations such as small apartment blocks, guest houses or offices
• Systems where thermal expansion compensation and pressure stabilization are required
• Installations aiming to reduce wear on boilers, heat exchangers, valves and piping

Key specifications

• Capacity: 200 litres
• Maximum allowable working pressure: 10 bar
• Membrane (diaphragm) type separation of water and gas chamber
• Steel pressure vessel construction
• Intended medium: domestic hot water (c.w.u.)

How to use

Install the expansion vessel in the cold water line or at a location recommended by the system designer, ensuring the connection orientation and mounting bracket follow the manufacturer’s installation guidelines. Pre-charge the gas side to the correct pressure for the system (typically slightly below static system pressure) and check tightness before commissioning. After installation, fill the hot water system slowly, vent air from high points and monitor the system pressure while heating to verify the vessel absorbs thermal expansion and stabilizes pressure. Periodic inspection of pre-charge pressure and visual condition of the vessel is recommended.

Usage recommendations

Match the vessel pre-charge pressure to the system’s static pressure and follow local codes and manufacturer instructions for mounting, safety valves and periodic maintenance to ensure long-term reliable operation in domestic hot water installations.