Automatic Demineralizer for Ultrapure Water, 135 to 875 Liters

Using a demineralizer: Producing ultrapure water.

First, keep in mind that this type of equipment is only useful when installed after a reverse osmosis system. Using it on unfiltered water would simply soften your water, but at a much higher cost than using a water softener.

A demineralizer captures the small ions that pass through RO membranes due to the high pressure inside an RO system, to produce ultrapure water (TDS close to 0PPM) that is nonconductive (zero conductivity). This type of water is primarily used in medical applications, but sometimes in industrial applications as well.

Why is this demineralizer called "automatic"?

Unlike mixed-bed demineralizers (several types of resin mixed in a single vessel), this model has two separate vessels: one containing cation exchange resin and the other containing anion exchange resin.

This difference is crucial to your initial investment and long-term operating costs! With a mixed-bed demineralizer, you have a single vessel, so the initial purchase costs less, but the resin cannot be regenerated. Regularly replacing your resin eventually costs more than the price difference for an automatic system equipped with two vessels and regeneration valves.

The cation exchange resin removes cations (Na+, Ca++, Mg++...) by releasing H+ ions, while the anion exchange resin removes anions (Cl-, SO4--, NO3--...) by releasing OH- ions, for which it has a lower affinity.

When a resin can no longer bind ions, it is considered saturated and must be regenerated. The H+ ions in the cation exchange resin are regenerated by countercurrent injection of hydrochloric acid, and the anion exchange resin is regenerated by injecting sodium hydroxide.

A complete range for all your needs

We offer 7 standard sizes for our automatic demineralizers.

If your requirements exceed these capacities, contact us by email for a tailored quote.

You can download the complete user manual for this equipment here.

Technical Specifications

• 25-micron pre-filter included
• Tank containing HCl to regenerate the cation exchange resin
• Tank containing NaOH to regenerate the anion exchange resin
• Automatic control valve
• Flow meter
• Electrical control panel
• Recirculation (multiple passes) available on request

Consumables:

• Cation exchange resin
• Anion exchange resin
• Hydrochloric acid (HCl)
• Sodium hydroxide (NaOH)