Desalination Valves

Mastering the Challenges of Saline Environments

Water treatment, particularly desalination, is a race against corrosion. VALVA designs valves to conquer these specific industry pain points:

• Chloride Corrosion: Preventing pitting and crevice corrosion in high-salinity brine.
• Biofouling: Utilizing materials that naturally inhibit the growth of marine organisms.
• High-Pressure RO Systems: Engineering valves to handle the immense pressures required for Reverse Osmosis (RO) membranes.
• Cavitation & Erosion: Protecting valve internals from the abrasive effects of high-velocity sand and salt particles.

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Comprehensive Solutions for the Water Cycle

We support every stage of the desalination and treatment process:

1. Seawater Intake: Large-scale valves (Gate/Butterfly) designed for raw seawater entry, often utilizing Nickel-Aluminum Bronze for its anti-biofouling properties.
2. Pre-treatment & Filtration: Reliable flow control for sand filters and ultrafiltration units.
3. Reverse Osmosis (RO) Blocks: High-pressure check valves and ball valves in Super Duplex S32750 to handle the core desalination process.
4. Brine Discharge: Robust solutions for handling high-concentration waste brine.
5. Potable Water Distribution: Certified stainless steel valves ensuring safe, clean water delivery to the municipal grid.

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Optimized Metallurgy for Seawater Service

In desalination, the wrong material leads to rapid failure. We specialize in the “Golden Trio” of water treatment metals:

Application	Recommended Material	Why it Works
High-Pressure Brine	Super Duplex 2507 (5A)	High PREN value (>40) and extreme mechanical strength.
Seawater Intake	Alu-Bronze (C95800)	Natural protection against barnacles and algae.
Standard Filtration	Duplex 2205 (4A)	Cost-effective resistance to chloride stress corrosion.
Coastal Infrastructure	Super Austenitic 254SMO	Exceptional resistance to warm, aerated seawater.

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Global Standards & Water Safety

VALVA ensures that every valve meets the rigorous demands of international water projects:

• Material Integrity: 100% PMI (Positive Material Identification) to ensure alloy purity.
• Testing: Hydrostatic and pneumatic testing per API 598.
• Quality Certification: ISO 9001, CE, and Material Test Reports (MTR 3.1) provided.
• Design Standards: ASME B16.34, API 600, API 609 (for Butterfly valves).

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