Continuous electrodeionisation polishing
HydraCDI
A hygienic stainless polishing system for qualified RO permeate, producing high resistivity water without routine acid and caustic resin regeneration.
UK designed and manufacturedFactory assembled and testedLifecycle service support
Real Hydra-Clear equipment
The product
Polish RO permeate continuously and prove the final quality.
HydraCDI combines ion exchange media, selective membranes and a controlled DC field. Ionic contaminants move from the product path into a separate concentrate stream while online resistivity confirms the polished water quality. The platform includes electrical flow measurement, controlled DC output, low flow protection and modular expansion.
Published figures provide a selection basis. Guaranteed performance is confirmed from the approved water analysis, operating conditions and project design.
Hygienic stainless steel process skid
Electrical feed, product and concentrate flow measurement
Online resistivity measurement
Regulated DC control matched to the module
Automatic permissives and low flow protection
Single or multiple equal modules in parallel
Standard and hot water sanitisation module options
Designed specifically for qualified RO permeate
Range and selection data
Six module duty classes.
Select the best fit module, then repeat equal modules in parallel for greater output or future expansion. Final module count follows feed quality, required product quality, turndown and resilience.
| Duty class | Nominal product | Operating product range | Minimum concentrate | Typical recovery |
|---|---|---|---|---|
| 0.44 | 0.44 m³/h | 0.22 to 0.67 m³/h | 27.5 L/h | 90 to 95% |
| 1.10 | 1.10 m³/h | 0.55 to 1.65 m³/h | 55 L/h | 90 to 95% |
| 2.00 | 2.00 m³/h | 1.10 to 3.10 m³/h | 110 L/h | 90 to 95% |
| 2.80 | 2.80 m³/h | 1.40 to 4.20 m³/h | 154 L/h | 90 to 95% |
| 3.30 | 3.30 m³/h | 1.65 to 5.10 m³/h | 181 L/h | 90 to 95% |
| 5.10 | 5.10 m³/h | 2.55 to 7.67 m³/h | 280 L/h | 90 to 95% |
Product photography
See the equipment, layout and service access.
Explore the equipment, internal components and access provided for routine maintenance.
Typical applications
Where HydraCDI fits.
High purity process water
Final ionic polishing where RO conductivity alone is not sufficient.
Pharmaceutical and healthcare
A controlled polishing stage within documented high purity systems.
Power and boiler applications
High resistivity water for demanding steam and utility duties.
Laboratory and electronics
Consistent final polishing for sensitive rinsing and process applications.
Brochures and technical data
Download the documents for HydraCDI.
Product literature is also available from the central Downloads page. Keeping it here makes the specification route faster for engineers and procurement teams.
Keep the equipment performing after handover.
Discuss service supportHydra-Clear provides commissioning, planned maintenance, membrane care, resin and media replacement, spares, controls support and optimisation across equipment from every manufacturer.