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OVERVIEW
FULLY DEMINERALIZED WATER
DI systems use two types of resin. The cation resin captures positive ions like calcium and sodium, and the anion resin captures negative ions like chloride and sulfate. What leaves the system is pure, demineralized water.
The resins are regenerated automatically with acid and caustic. DI is used on its own, or as final polishing after RO with a mixed-bed unit.
TYPICAL USES
- Boiler and cooling tower feed
- Laboratory and pharmaceutical water
- Battery and electroplating water
- Polishing after RO
HOW IT WORKS
INSIDE A DI SYSTEM
Water passes through a cation resin vessel, then an anion resin vessel. A mixed-bed unit can be added for the highest purity. Conductivity meters check the water quality online.
STEP 1
Raw water
Tap, well, river or sea
STEP 1
Feed water
Filtered or RO water
STEP 2
Cation resin
Removes positive ions
STEP 1
Raw water
Tap, well, river or sea
STEP 3
Anion resin
Removes negative ions
STEP 1
Raw water
Tap, well, river or sea
STEP 4
Mixed bed
Optional final polishing
STEP 1
Raw water
Tap, well, river or sea
STEP 5
Demineralized water
Very low conductivity
KEY FEATURES
WHY CHOOSE OUR DI SYSTEMS
Very pure water
Removes almost all dissolved minerals.
Online quality monitoring
Conductivity meters check the water all the time.
Two-stage resin design
Cation and anion vessels working together.
Automatic regeneration
Acid and caustic regeneration, by itself.
Two-bed or mixed-bed
Choose the setup for the purity you need.
Low energy use
No high-pressure pumps needed.
SPECIFICATIONS
TECHNICAL DATA
The full model table, with flows, resin volumes and chemical use for each DI system, is in the datasheet.
Capacity range
Up to 1,500 m³/day
Process
Cation + anion exchange
Configuration
[Two-bed, mixed-bed or both]
Regeneration
[Acid (HCl) and caustic (NaOH)]
Vessel material
[Rubber-lined steel or FRP]
Control
[PLC with touch screen]
Chemical system
[Regeneration dosing skid]
APPLICATIONS
WHERE DI SYSTEMS IS USED