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

Product Features
  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 Conditions
  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

Specifications

Model	Flow Rate (M3/HR)		Vessel Size	Exchange Capacity	Resin Capacity (Liters)
	Minimum	Maximum	(Inch)	(Grains CaCO3)	Cation	Anion
MB-240-21	4.0	6.0	21 x 62	127000	175	200
MB-240-24	6.0	8.0	24 x 72	190000	250	300
MB-360-30	8.0	12	30 x 72	300000	400	475
MB-360-36	10	15	36 x 72	470000	575	650
MB-360-42	15	20	42 x 72	640000	750	900
MB-360-48	20	25	48 x 72	834000	1000	1200