Check valve with anti-pollution protection, internal thread type EA291NF 1 inch 149B2222

Backflow preventer valves – protecting installations and health

Backflow preventer valves, often simply called non-return valves, play a key role in protecting the water supply network from contamination. Their task is to prevent backflow, which can occur due to a drop in network pressure and the introduction of contaminated water into the source. This ensures the safety of drinking water and protects the installation from damage.

A type EA non-return valve with a nominal diameter of 1 inch (DN25) is a reliable solution used in both domestic and industrial installations. The design of this valve allows for leak tightness control and drainage of the installation riser, which facilitates maintenance and ensures long-term performance. Made of brass, with a sealing unit made of POM (polyacetal) and an NBR (nitrile) gasket, it guarantees corrosion resistance and durability in harsh conditions.

Application and functions:

• Protection against contamination: Prevents contaminated water from flowing back into the water supply network.
• Leak tightness control: Has a port for checking the tightness of the seal, allowing for regular checks of proper operation.
• Installation drainage: Equipped with a port for draining the installation riser, which facilitates maintenance and repairs.
• Universal mounting: The ability to mount in any position provides flexibility during installation.
• Wide range of applications: Ideal for use in water supply installations in residential, commercial and industrial buildings.

Construction and materials:

The valve is characterized by a solid construction ensuring reliable operation for a long time. The materials used have been selected for their corrosion resistance and resistance to external factors:

• Body: Brass – provides durability and corrosion resistance.
• Sealing unit: POM (polyacetal) – guarantees smooth operation and tightness.
• Gasket: NBR (nitrile) – resistant to the action of water and other media.

The valve meets the requirements of PN-EN 13959, which confirms its high quality and safety of use. It is designed to work with clean liquids and gases at a maximum pressure of 1.0 MPa and a temperature of up to 80°C. This makes it a reliable element of every water supply installation, providing protection for both end-users and the entire water supply network. It is important to regularly check the condition of the valve and follow the manufacturer's recommendations regarding maintenance to ensure its long-term efficiency.