Diaphragm expansion vessel BASEFLEX-18, 18L, 1.5/6 bar / 70°C, threaded connection G3/4" male, red RAL 3002, for heating and cooling systems, vertical mounting 25302

Expansion vessel for heating and cooling systems

This is a Baseflex-18 diaphragm expansion vessel with a capacity of 18 liters, designed for closed heating and cooling systems. Its diaphragm construction provides reliable compensation for changes in the volume of the heating medium and stabilizes the pressure in the system. The vessel is ideal for both professional installers and end-users looking for a solid and effective solution.

Construction and application

The Baseflex-18 vessel is designed to operate in central heating systems (according to EN12828 standard) and cooling systems. It uses a diaphragm made of EPDM rubber, which effectively separates the water from the metal housing, minimizing the risk of corrosion. The solid, welded construction and powder coating in red RAL 3002 guarantee durability and aesthetic appearance. Nitrogen filling helps maintain stable pre-pressure for longer. A threaded G3/4”M connection facilitates installation in existing systems.

• Expansion compensation: The vessel absorbs changes in the volume of the heating medium resulting from temperature changes, maintaining constant pressure in the installation.
• Corrosion protection: The EPDM membrane isolates water from metal, preventing internal corrosion.
• Durability and reliability: Welded construction and powder coating ensure long device life.
• Wide application: Suitable for heating and cooling installations, and can also work with glycol (up to 50%) and ethanol (up to 30%).
• Safety: Compliance with the Pressure Equipment Directive PED 2014/68/EU confirms a high level of safety.

Operating parameters and specifications

The Baseflex-18 vessel is characterized by a maximum working pressure of 6 bar and a pre-pressure of 1.5 bar. It can operate at temperatures from -10°C to 70°C, making it a universal solution for various operating conditions. It is designed for vertical mounting and has a nominal connection diameter for expansion of 3/4 inch (20). The flange pressure class is PN 16. Please note that the vessel is not intended for drinking water or solar collector circuits.