Deionized Water Systems

Deionized Water System for PCBA Cleaning

The Deionized Water System for PCBA Cleaning – DEZ-CS300 is the dedicated product in this category. It combines reverse osmosis and mixed-bed deionization inside an enclosed floor-standing cabinet. Municipal water first passes through the RO stage to remove most dissolved salts and impurities. The mixed bed then removes remaining positively and negatively charged ions before the treated water is supplied to compatible cleaning equipment or a storage tank.

Why Aqueous Cleaning Requires DI Rinse Water

Municipal water contains dissolved minerals, salts and other ionic material. If untreated water is used for the final rinse, some of this material may remain on the PCBA, stencil or fixture after drying.

DI water reduces the dissolved ionic content of the rinse supply. It is used after the main washing stage to remove dissolved contamination and remaining cleaning-agent residue from the workpiece.

DI water does not replace the cleaning chemistry. It also does not remove flux residue by itself. The complete aqueous process must combine compatible washing, DI-water rinsing and controlled drying.

For more information about selecting a cleaning method, see PCBA Flux Residue and Ionic Contamination Cleaning.

DI Water Production and Cleaning Process

The DEZ-CS300 water-treatment process is:

Municipal Water → Reverse Osmosis → Mixed-Bed Deionization → DI-Water Storage or Distribution → Cleaning Equipment

The associated aqueous cleaning process is:

Chemical Wash → DI-Water Rinse → Hot-Air Dry

These are two connected processes. The DEZ-CS300 produces the rinse water, while the cleaning machine controls washing, rinsing and drying of the PCBA, stencil or fixture.

Cleaning Equipment That Uses DI Water

Cleaning requirement	Related equipment
Offline batch cleaning of assembled PCBAs after soldering	Offline PCBA Cleaning Machine for Batch Flux Removal – DEZ-C743
Continuous aqueous cleaning of assembled PCBAs	Inline Water-Based PCBA Cleaning Machine – DEZ-C1360
Water-based washing and rinsing of SMT stencils	Automatic Water-Based Stencil Cleaning Machine – DEZ-C750
Washing, rinsing and drying of compatible fixtures, pallets and carriers	Automatic SMT Fixture Cleaning Machine – DEZ-C756

Not every cleaning machine requires DI water. Compare the complete range of PCBA Cleaning Machines, Stencil Cleaning Machines and Fixture and Squeegee Cleaning Machines.

Deionized Water Applications

The DEZ-CS300 supports compatible electronics-cleaning processes where controlled DI rinse water is required after the main washing stage.

In EMS and Contract Electronics Manufacturing, a DI water system may supply batch or inline cleaners processing different assemblies and production volumes.

In Automotive Electronics SMT Manufacturing, the required rinsing process and cleanliness acceptance method should be defined according to the assembly, flux system and customer requirement.

DI water can also support compatible water-based stencil, fixture, pallet, carrier and squeegee cleaning processes when the cleaning equipment includes a defined rinsing stage.

Frequently Asked Questions

Is a deionized water system a PCBA cleaning machine?

No. The Deionized Water System for PCBA Cleaning – DEZ-CS300 produces DI rinse water. A separate cleaning machine performs the washing, rinsing and drying process.

Does every PCBA cleaning machine need a DI water system?

No. Aqueous PCBA cleaning machines normally require DI water for rinsing. Single-sided brush cleaning processes may use cleaning fluid and brushing without a DI-water rinse.

Compare the different processes under PCBA Cleaning Machines.

Can one DI water system supply several cleaning machines?

This depends on the verified system output, peak combined demand, storage capacity, distribution distance and whether the connected machines operate simultaneously. The complete water balance must be reviewed before selection.

How is the required DI-water capacity determined?

Capacity is determined from the cleaner’s rinse-water consumption, operating hours, peak demand, number of connected machines and available storage. Average daily consumption alone is not sufficient for system sizing.

What water information is required before quotation?

Provide the incoming water conductivity, pressure and available flow, required produced-water resistivity, expected consumption, storage requirement, connected cleaning equipment and available power supply.

Request a Deionized Water System Proposal

Tell DEZ which cleaning machine or rinsing process requires DI water. Fill out the form below.