Diaphragm expansion vessel CONTRAFLEX-35, 35L, 1.5/3 bar / 70°C, threaded connection R3/4", red RAL 3002, for heating and cooling systems, vertical 26343

Expansion vessel for heating and cooling systems

This is a Contraflex-35 diaphragm expansion vessel with a capacity of 35 liters, designed for closed heating and cooling systems. It ensures stable pressure in the system by compensating for changes in water volume due to temperature fluctuations. Made of high-quality materials, it is a reliable element of any installation.

Construction and application

The vessel is equipped with an SBR membrane, which allows for safe and efficient storage of excess fluid. Suitable for operation with glycol mixtures up to 50% concentration, making it an ideal solution for both central heating systems and cooling installations. A threaded R3/4" connection facilitates installation and integration with the existing system. The red color (RAL 3002) ensures good visibility and identification.

The Contraflex-35 expansion vessel is factory-filled with nitrogen, which ensures longer stability of the initial pressure (1.5 bar) and minimizes the need for its adjustment. It also has a wall bracket to facilitate mounting and legs to ensure stable positioning on the floor. The maximum working pressure is 3 bar, and the operating temperature range is -10 to 70°C.

Key features and benefits

• Expansion compensation: Absorbs changes in water volume in the installation, maintaining constant working pressure.
• Versatility: Suitable for heating and cooling installations, and can also be used with glycol.
• Durability: Made of high-quality materials, resistant to corrosion and mechanical damage.
• Safety: Compliant with the Pressure Equipment Directive PED 2014/68/EU and EN13831 standard, guaranteeing safe operation.
• Easy installation: Equipped with a threaded R3/4" connection and a wall bracket and legs for convenient installation.
• Factory tests: Each vessel is factory tested, confirming its quality and reliability.
• SBR membrane: Suitable for operation with antifreeze substances, increasing the range of applications for the vessel.
• Threaded connection without paint coating: Guarantees trouble-free connection without the risk of damaging the thread during assembly.