Reflex - NG 12 Welded Diaphragm Expansion Vessel - 12 Ltr

The Reflex NG 12 diaphragm expansion vessel is designed for sealed heating and cold water systems, providing reliable pressure control in closed-system installations. Designed and manufactured in accordance with DIN EN 13831 and approved under Pressure Equipment Directive 2014/68/EC, this vessel is built for reliable long-term operation across a wide range of heating and chilled water applications.

The vessel features a welded design, a non-replaceable SBR diaphragm in accordance with DIN EN 13831, and a durable epoxy resin coating to support long service life. It is also suitable for systems using antifreeze additives between 25% and 50%, making it a practical choice for demanding sealed-system duties where corrosion resistance and stable performance are important.

The Reflex NG 12 is supplied with a threaded connection and is intended for use in systems with maximum permissible system temperatures up to 120 °C and maximum operating temperatures up to 70 °C.

Key Product Features

• Reflex NG 12 diaphragm expansion vessel for sealed heating and cold water systems
• Designed and manufactured in accordance with DIN EN 13831
• Approved in line with Pressure Equipment Directive 2014/68/EC
• Durable epoxy resin coating
• Welded design
• Non-replaceable diaphragm according to DIN EN 13831
• Suitable for antifreeze additive concentrations from 25% to 50%
• Threaded connection
• Type: NG 12
• Colour: Grey
• Diaphragm material: SBR
• Nominal volume: 12 Ltrs
• Maximum useful volume: 10.8 Ltrs
• Minimum operating temperature: -10 °C
• Maximum system temperature: 120 °C
• Maximum operating temperature: 70 °C
• Maximum operating pressure: 6 Bar
• Factory pre-charge pressure: 1.5 Bar
• Connection: R 3/4"
• Diameter: 280 mm
• Height: 277 mm
• Tilt dimension approx.: 317 mm
• Weight: 2.30 kg

Reflex (est. 1898) is a German manufacturer of expansion vessels, pressurisation units and system components for heating and cooling networks. Their ranges support HVAC and potable water installations, commonly used in residential and commercial buildings for pressure maintenance, deaeration and system protection.