BRA.ECO 3F, 3T - Backflow preventers

The BRA.ECO 3F and 3T series are pre-assembled backflow preventers designed for use in heating, plumbing, and sanitary systems. These devices are essential for preventing reverse flow of fluids in installations where contamination or system damage could occur if flow is not controlled. The category includes models with screw connections (3T series) and flanged connections (3F series), suitable for a range of pipe sizes and system configurations.

These backflow preventers are built to STN EN 1717 standards and are certified for use with liquids up to class 4. They operate at a maximum pressure of 10 bar and are suitable for temperatures between 0°C and +65°C. The body and cap are made of brass or bronze, while the sealing membrane is EPDM. A filter must be installed upstream to ensure the device functions correctly, and the unit must be connected to a sewerage system for proper drainage.

How to choose

• Select the appropriate model (3T for threaded connections, 3F for flanged connections) based on the system’s piping configuration.
• Choose the correct size (1/2" to 2") to match the nominal diameter of the pipeline according to ISO 228-1 or STN EN 1092-1 standards.
• Ensure compatibility with the system’s operating temperature and pressure (up to 10 bar and 0°C to +65°C).

Frequently asked questions

Can these backflow preventers be used in both heating and cold water systems?
Yes, they are suitable for systems operating within the temperature range of 0°C to +65°C.

Is a filter required before installation?
Yes, a filter must be installed upstream to prevent debris from damaging the internal components of the device.