Check valve with anti-pollution protection, internal thread type EA291NF 3/4 inch 149B2212

Check valve with anti-pollution protection is a key component of the installation, protecting the system against backflow of media, preventing contamination and potential damage. Model EA291NF, manufactured by SOCLA (part of WATTS INDUSTRIES ITALIA S.R.L.), is particularly valued for its versatility and reliability. Made of brass, with a closing element made of POM (polyacetal) and an NBR (nitrile) seal, it ensures durability and corrosion resistance.

This valve, with a nominal diameter of 3/4 inch (DN20), 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. Its construction allows for installation in any position, making it easier to install in various configurations. Additionally, the valve has control ports with DN1/4’’ plugs, which allow for easy checking of the closure tightness, and a port for draining the installation riser.

Construction and functionality

The EA291NF valve is distinguished by its compact design and quiet operation, minimizing pressure loss in the installation. Double guide of the poppet (axial and lateral) assisted by a spring guarantees excellent tightness and high reliability. A special L-shaped seal further increases the certainty of operation. Thanks to this solution, the valve effectively prevents the backflow of media, protecting both devices and the health of users.

Application and compliance with standards

This valve finds wide application in water supply, heating and gas installations – wherever protection against backflow is required. It meets the requirements of PN-EN 13959 and ISO 228, NF E 03-005 standards regarding threaded connections, confirming its high quality and safety of use. The connection length is 75 mm. It is a proven choice for both professional installers and end-users looking for a reliable solution.