Mixed Bed Deionizer
ROTEK can design and build bespoke mixed bed polishing units to suit all of our customers'requirements. Cation and Anion resins are combined in a GRP or stainless steel vessel to produce ultra pure water. Usually a mixed bed polishing unit contains strong acid Cation (SAC) resin and strong base Anion (SBA) resins combined to a ratio of approximately 40% Cation resin to 60% Anion resin. (All resin volumes are dependent upon the incoming water analysis and the required quantity of treated water). Mixed bed polishers are typically installed when a water quality of less than 1 micro ohm conductivity is required. Rotek can install mixed bed polishers after a standard Reverse Osmosis or Demineraliser, to produce ultra high quality water. The Cation resins in our mixed bed polishers are of a higher specific gravity and settle at the bottom of the vessel whilst the Anion resin will automatically float to the top.
Please note: The Cation resin must be a strong acid Cation type (SAC) and the Anion resin must be a strong base Anion resin (SBA)
After a service cycle, each resin is regenerated as listed:
(SAC) : Strong Acid Cation resin is washed with approx. 30% hydrochloric acid.
(SBA) : Strong Base Anion is washed with approx. 26% caustic.
Please note: The above regenerate strengths refer to the values before being diluted by the mixed bed polisher educator systems.
Professional Series MIXED BED DEIONIZER
Pre-programmed 9 steps of regeneration procedures.
Each regeneration procedures timing is adjustable
P.L.C. control with light indications on a mimic panel
Resistivity Controller or Conductivity Controller is included.
Acid and caustic dosing systems.
Automatic / Manual switches provide flexible controls
Working Temperature: 5°C ~ 45°C
Working Pressure: 30 ~ 60 PSI
Feed Water Requirements: TDS below 200ppm / pH 6 ~ 8 /
Organics, Oxide, Chlorine below 1 ppm
Regeneration Chemicals: 28%HCL / 30%NaOH
Flow Rate (M3/HR)
Resin Capacity (Liters)
21 x 62
24 x 72
30 x 72
36 x 72
42 x 72
48 x 72