Diaphragm expansion vessel CONTRAFLEX-25, 25L, 1.5/3 bar / 70°C, threaded connection R3/4", red RAL 3002, for heating and cooling systems, hanging mounting 26243

Expansion vessel for heating and cooling systems

This is a diaphragm vessel from Flamco, model Contraflex-25, with a capacity of 25 liters, designed for closed heating and cooling systems. Its function is to compensate for volume changes in the system resulting from temperature changes, maintaining stable pressure. It is suitable for both domestic and industrial installations.

Construction and application

The Contraflex-25 vessel is made of durable materials, and its membrane is made of SBR – rubber resistant to glycol (up to 50% concentration). This allows it to be used in installations with antifreeze. Equipped with a threaded R3/4" connection, it facilitates installation and integration with the existing system. Red color (RAL 3002) ensures good visibility and identification. The vessel operates in a temperature range of -10°C to 70°C, making it a universal solution for various applications.

• Expansion compensation: Automatically adjusts to changes in water volume in the installation, preventing pressure increases.
• Protection against damage: Protects installation components from overload caused by temperature changes.
• Versatility: Suitable for heating and cooling installations, as well as those with glycol additive.
• Durability: Made of high-quality materials, ensuring long life.
• Easy installation: Threaded R3/4" connection facilitates integration with the existing system.

Parameters and characteristic features

The Contraflex-25 vessel is characterized by a pre-pressure of 1.5 bar and a maximum working pressure of 3 bar. Filled with nitrogen, which ensures longer stability of the initial pressure. The product complies with the Pressure Equipment Directive PED 2014/68/EU and EN13831 standard, which guarantees its safety and reliability. Factory tests confirm the high quality of each piece. The threaded connection without paint coating ensures trouble-free connection to the installation. The membrane is adapted to work with antifreeze substances, which increases the range of applications of the expansion vessel.