At Comeval we continue to strengthen our presence in one of the most demanding sectors in terms of materials and resistance: desalination.

On this occasion we present dual plate wafer check valves in super duplex 5A material, with a PREN above 40, a feature that is essential to guarantee optimum performance in corrosive environments. These valves are designed to prevent reverse flow and protect equipment and installations, while offering high hydraulic efficiency and minimal pressure drop.

Valves in super duplex 5A material for maximum corrosion resistance in desalination applications and pump protection

For one of our latest projects, a desalination plant in Spain, we selected different types of valve in super duplex material, a highly resistant stainless steel thanks to its metallurgical structure and its notable chromium, molybdenum and nitrogen content.

One of the key indicators for this type of material is the PREN (Pitting Resistance Equivalent Number), a value that estimates its resistance to pitting corrosion, particularly relevant in environments containing chlorides, such as seawater. The higher the PREN, the greater the material’s resistance to this type of localised corrosion. For that reason, the choice of super duplex steels with a PREN above 40 garantiza aa markedly greater protection against the extreme conditions components face in the desalination process.

Our aim is to support every customer in finding the right solution, making sure each valve installed adds value, safety and durability. With every project in the desalination sector we reaffirm our commitment to technical excellence and to providing reliable solutions for critical applications.