SMART WATER MANAGEMENT
2101 , super austenitic 254 SMO or austenitic 316L for various components . In the brine water intake stage of multieffect distillation ( MED ) and multi-stage flash ( MSF ) desalination plants , super duplex valves are often used to withstand highly corrosive conditions .
Valves in wastewater treatment
Wastewater treatment processes require valves with high strength and resistance to erosion and corrosion . A recent project by Barhale for Thames Water in East London used duplex stainless steel in wastewater pipes and associated valves , demonstrating the material ’ s suitability for these applications .
Valves in flood management
Duplex grades are increasingly used in flood management systems , where valves must resist salt water corrosion and offer high strength with low weight . Notable projects include :
• Tammerkoski rapids , Tampere , Finland : Outokumpu ’ s Forta LDX 2101 lean duplex grade was used for main structural parts of the floodgates , including critical valve components .
• Gårda Dämme , Gothenburg , Sweden : Outokumpu ’ s Forta LDX 2404 lean duplex grade was applied in flood control valves to protect the coastal city from rising sea levels .
• Mont St Michel , France : Industeel supplied 2205 duplex plate for cladding the flood barrier gates , with valves also made from duplex grade 2205 .
• Victoriaslussen project , Stockholm , Sweden : New sluice gates in duplex 2205 , including high-performance valves , were installed to enhance flood protection and prevent salt water contamination of drinking water supplies .
• Kamihirai Flood Gate , Tokyo , Japan : NSSC ’ s SUS323L lean duplex grade was used for slide gates and associated valves , offering necessary strength and corrosion resistance while minimising weight .
Conclusion
As water scarcity increases globally , the valve industry has an important role in developing solutions for efficient water management . From desalination plants to wastewater treatment facilities and flood control systems , valve technologies are essential in conserving , treating and distributing water .
Duo check valve , wafer type , in super duplex 2507 , 150lb-24 ”. Their superior corrosion resistance makes them ideal for desalination or seawater service . Photo : Weidouli Valves Co . Ltd .
The ongoing development of efficient and durable valve solutions will be important in addressing future water challenges . Cooperation between valve manufacturers , water treatment specialists and materials scientists will be necessary to create new water management technologies .
72 Valve World November 2024 www . valve-world . net