UO 300 C
UO-D 900
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UO-D 300 C

Reference: 5110010179
Description:Ready-to-connect system in compact design including pre-treatment for desalination of drinking water according to drinking water regulations (free chlorine not detectable).

Due to integrated water pre-treatment components as pre-filter, backflow preventer, simplex water softener and limitron hardness monitoring unit a piping on site is not necessary. Easiest on site-installation due to only 4 connections (drinking water, permeate, waste water and power socket).

Search Name 420 212
Item Name UO-D 300 C
Brand Herco
  • Skid mounted, complete unit (1130 x 750 x 1520 mm)
  • Simplex softener Clack WS1CI 30L mono resins
  • RO Digital controller
  • Recovery from 75% to 80%
  • Salt rejection percentage: min. 97%
  • Working pressure: 12 bar
  • Voltage: 230 V/50 Hz
  • Digital flow meters

Unit design

  • Stainless steel base frame for installation of all components. The RO part is installed on a panel made of powder coated steel.
  • Prefilter with 100 μm-filter cartridge and two pressure gauges,
  • pipe separator BA according to EN 1717 and DIN 1988-100
  • water meter controlled simplex water softener
  • hardness monitoring unit limitron for continuous monitoring of feed water hardness, in case of hard water the reverse osmosis shuts down.
  • Special inlet filter with 5 μm-filter cartridge with two pressure gauges filled with glycerin,
  • high pressure pump rotary-vane type,
  • high performance wound module(s) with PA/PS composite membranes in stainless steel pressure vessel.
  • Valves such as sampling valves for feed water and permeate, inlet solenoid valve, valves to regulate the flow rate of permeate and concentrate.
  • Pressure sensors for pump feed pressure and operating pressure.
  • Flow indicator in the display for permeate and concentrate.
  • Conductivity measurement of permeate with temperature compensation.
  • Screw connection for a manual cleaning unit.
  • Connecting cable (3 m) with 16A – 6h CEE three-pole plug.
  • Unit completely wired and pre-assembled and ready for installation. Electrical equipment in accordance with VDE 0100 part 600, VDE 113 part 1.

Microprocessor control RO digital

  • for fully automatic monitoring and control of Reverse Osmosis Unit.
  • Process visualization with central display of operational status and data (analogue und digital values ) and hours of operation on 4-line, backlit LCD text display. Simple menu-driven operation of the controller with 6 buttons.
  • Automatic logging of relevant operating data (analogue and digital data, 1960 data sets), storage interval programmable.
  • Highest operational safety due to adjustable alarms and limits of the operating parameters with selectable system response.
  • Operating conditions: permeate production, permeate rejection / recirculation, concentrate displacement / flushing, intermittent flushing when system is idle, shutdown by an external signal.
  • Analogue inputs: permeate conductivity (temperature compensated) permeate temperature, feed water, operating and concentrate pressure, flow rates of permeate and concentrate, calculated feed water flow, 2 additional programmable analogue inputs (e.g. for pressure, flow, level measurement).
  • Digital Inputs: RO-unit start, RO-unit stop, hard water / motor protection, external stop, 3 universal inputs (free configurable)
  • Analogue outputs: 2 universal outputs 4-20mA, e.g. for DDC.
  • Digital outputs: high-pressure pump, valve outputs 3x (24 VDC) for example for feed water, concentrate flushing, permeate rejection or recirculation, collective fault indication as a floating changeover contact, universal output.
  • LED indicators for power and fault, fault alarms as plain text in the display.


Footnotes The unit is designed for a maximum TDS of 1,000 mg/l, a water temperature of 15°C, a maximum colloidal index of 3 and free permeate outlet. Under these conditions, the unit still reaches design permeate flow after three years of ope-ration. The permeate recovery depends on the raw water quality and the type of pre-treatment.
Additional Options
  • Permeate recirculation PR500/24
  • VSE Blending device
Height 1520 mm
Membranes 4040 x 1
Controller RO Digital
Width 1130 mm
Permeate Flow 300 l/h
Recovery 75 – 80 %
Max Operating Pressure 12 bar
pH Range 3 – 11
Feedwater Connection DN 20
Permeate/Concentrate Connection DN 10
Minimal Salt Rejection 97 %
Voltage 230V / 50Hz
Motor Power 0.55 Kw
Pre-fusing 16 A
Conductivity Range 1 – 999 µS/cm
Feedwater Pressure min./max. 4/6 bar
Feedwater Temperature min./max. 5/35 °c
Ambient Temperature Max. 40°c
Weight 135 kg
Waste Water Connection HT 50
Capacity of softener 120 °dH x m³
Depth 750 mm