Diaphragm expansion vessel CONTRAFLEX-8, 8L, 1.5/3 bar / 70°C, threaded connection R3/4", red RAL 3002, for heating and cooling systems, vertical mounting 26073

Diaphragm expansion vessel – reliable protection for heating and cooling systems

This is an expansion vessel from Flamco, model Contraflex-8, with a capacity of 8 liters, designed for closed heating and cooling systems. Its function is to compensate for changes in water volume due to temperature fluctuations, maintaining stable pressure in the system. This ensures the safe and efficient operation of the entire installation. It is a key element of any system designed to ensure its long-term efficiency.

Construction and application

The Contraflex-8 vessel is characterized by a solid construction and high quality workmanship. Equipped with an SBR membrane, resistant to glycol (up to 50% concentration), it works perfectly in installations with antifreeze fluid. Designed for hanging mounting, it has a threaded R3/4" connection, which facilitates integration with the existing system. Its red color (RAL 3002) ensures easy identification in the installation. The vessel complies with the Pressure Equipment Directive PED 2014/68/EU and EN13831 standard, which guarantees its safety and reliability.

Key features and benefits

• Expansion compensation: Effectively eliminates changes in water volume in the installation caused by temperature fluctuations, preventing pressure increases and damage to system components.
• Glycol resistance: The SBR membrane allows the vessel to be used in installations with antifreeze fluid with a glycol concentration of up to 50%, which is particularly important in outdoor systems or those exposed to low temperatures.
• Safety confirmed by certificates: Compliance with EN13831 standards and the Pressure Equipment Directive PED 2014/68/EU ensures a high level of safety.
• Factory tests: Each vessel is factory tested, guaranteeing its correct operation from the start.
• Durability and reliability: Nitrogen filling helps maintain stable initial pressure for a long time, and the galvanized ring connecting the two halves ensures the durability of the structure.
• Easy installation: The R3/4" threaded connection without a paint coating facilitates quick and easy connection to the installation.
• Wide operating temperature range: The vessel can operate at temperatures from -10°C to 70°C, making it a universal solution for various types of installations.

This expansion vessel is an investment in the long-term and trouble-free operation of your heating or cooling system. Its solid construction, high quality workmanship and compliance with applicable standards make it the ideal choice for both professional installers and demanding end users.