If your process requires an extremely high quality of water, WWT has a packaged demineralizer system to fit your needs. Our standard catalog designs offer the very latest in ion exchanger technology. In addition, we use only the finest grades of ion exchange resins and materials. Our goal is to provide you with the proper balance of robust hardware and reliable operation.

Wigen is a leader in the development of demineralizer systems, with installations in virtually every configuration imaginable. Our systems are used in a wide range of applications, including; food processing, boiler makeup and rinse processes for the microelectronics industry.

Process Theory
Process Theory All naturally occurring water contains dissolved mineral salts. While in solution, these salts separate into positively charged cations and negatively charged anions. Through the process of ion exchange, demineralization can significantly reduce the levels of these ions. Thus, by virtue the total dissolved solids (TDS) will also be dramatically lowered.

The process begins when raw water is passed through cation exchange resin. The cation resin is in the hydrogen form (H+) and exchanges all the positively charged ions for hydrogen, thus converting all the impurities in the water into acids.

The acidic effluent water from the cation exchange is then passed through anion exchange resin. The anion resin is in the hydroxyl form (OH-) and exchanges all the negatively charged ions into the hydroxyl form, completing the conversion of all impurities into water (H+ + OH- --> H2O), thus providing pure demineralized water.

Dual bed demineralizers use separate tanks; one containing cation resin, the other containing anion resin. A weak base dual-bed demineralizer produces water with a resistance of approximately 50 kOHM/cm. A strong base dual-bed demineralizer produces water with a resistance of about 200 kOHM/cm.

Mixed bed demineralizers utilize a single vessel, to thoroughly mix both the cation and anion resins. The mixed resin configuration produces a much higher water quality than a conventional dual-bed system. In fact, our standard mixed-bed demineralizers produce water with greater than 10 megOHM/cm resistance, which is equivalent to <0.05 mg/L of sodium chloride.


Demineralizer System Design
Our standard demineralizers are pre-engineered and pre-assembled (skid mounted), to minimize expensive installation and start-up costs. Simple utility connections are generally all that is required to make your system functional. WWT's team of design engineer's and automation specialists will work with you, to carefully select the right configuration for your needs. Let us show you why "WWT is the most trusted name in water treatment"

Standard Features

• High quality, non-code, vinyl ester lined steel or FRP pressure vessels
• High quality ion exchange resins
• Fully supported, Schedule 80 PVC manifold plumbing
• High quality, PVC valves (signal actuated or diaphragm type)
• Easy to use PLC controls
• State-of-the-art analytical and monitoring devices
• Direct read-out flow meters
• Sampling Ports
• Skid mounted (pre-plumbed, pre-wired & tested)
• Regenerant draw-tube assemblies (for use with customer supplied containers)

Optional Features

• ASME code pressure vessels
• Rubber linings (all wetted components)
• Custom Allen-Bradley® PLC's and user interfaces
• Batch controls
• Remote monitoring and custom SCADA systems
• Regenerant pump and forwarding stations
• Caustic drum heaters
• Recirculation pumps (for polishing effluent to desired quality)
• Valve position indicators
• Custom logbooks and analysis tools