UO 1000 BW
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UO 3500 BW

Brackish water RO system for desalination of hardness stabilized brackish water (by antiscalant dosing) with a salt content of up to 5000 mg/l

BW-systems already contain:

  • Control for metering pump Dosin AS-K
  • concentrate flushing device KSE
  • Preparation for injection point
  • Connection Set for manual cleaning unit, ARA
Brand Herco
  • Complete unit skid mounted
  • RO 1000 controller
  • Recovery: 50%
  • Salt rejection percentage: min. 97%
  • Design pressure: 15 bar
  • Voltage: 3 x 400V / 50 Hz
  • Analogue flow meters
  • Incl. concentrate rinsing
  • Incl. connector kit for manual cleaning set

Unit design

  • Stainless steel main frame for housing the instruments and controls.
  • Special inlet filter with 5 μm-filter cartridge, stainless steel high pressure pump low noise (incl. frequency converter for BW/FU systems), multi-stage centrifugal type, low energy spirally wound modules with energy-efficient PA/PS composite membranes in GRP vessels with inliner.
  • Valves such as sampling valves for feed water and permeate (for each pressure vessel), inlet diaphragm valve, valves made of stainless steel to regulate the flow rate of permeate, concentrate and concentrate recirculation.
  • Pressure gauges for inlet and outlet pressure pre-filter, pump pressure, operating pressure and concentrate pressure, pressure switch for monitoring the feed water pressure.
  • Flow meters for permeate, concentrate and concentrate recirculation flow rate.
  • Permeate conductivity measurement, temperature compensated, measuring range 2-200 μS/cm.
  • Connection set for cleaning device, T-piece for injection point, concentrate flushing device.
  • Control cabinet with lockable main switch, electrical switchgear for control of the high-pressure pump and antiscalant dosing unit.
  • Unit is completely wired, pre-assembled and ready for installation. Electrical equipment in accordance with VDE 0100 part 600, VDE part 1.

RO 1000 microprocessor control system

  • for fully automated monitoring and control of the reverse osmosis
  • unit with two-line LCD (16 characters per line) and process-visualisation of
  • Operating data: permeate conductivity (temperature-corrected), permeate temperature, operating hours,
  • Malfunction signals: low pressure, hard water, motor overload, high conductivity prealarm, high conductivity fault, status signals: permeate discard, permeate recycling, concentrate displacement, concentrate rinse, intermittent rinse during shut-down, shut-down by external signal (forced stop, regeneration), LEDs for operation, malfunction, regeneration, discard, disinfection and full tank.
  • Inputs (low voltage) for level control with 1 or 2 float switches, hardness monitoring unit (the RO 1000 control system includes control functions for the limitron hardness monitoring unit), shut-downs by external signal (forced stop, regeneration), 2 universal inputs,
  • Outputs for softening unit (230V/50Hz), 2 solenoid valves for concentrate rinse, permeate discard and recirculation, universal output, analogue output conductivity permeate (4-20 mA) and DDC (collective malfunction signal on floating changeover contact).
Advantages Optimized energy and operation cost by adapted pump capacity and full use of net pressure.

  • Short payback period
  • reduced maintenance, particularly quiet
  • future-proof by efficiency class IE 3
Good to know Using high quality materials, brakish water RO systems are designed to be long-term compatible with the high salt content of the water, particularly on the concentrate side
Footnotes The units are designed for a maximum TDS of 5,000 mg/l, a water termperature of 15 °c, a maximum colloidal index of 3 and free permeate outlet. Under these conditions, the units still reach design permeate flow after three years of operation. The permeate recovery depends on the raw water quality and the type of pre-treatment.
Height 1900 mm
Membranes 8040 x 3
Controller RO 1000
Flow Rate 3500 l/h
Width 2840 mm
Permeate Flow 3500 l/h
Recovery 50 %
Max Operating Pressure 15 bar
pH Range 3 – 11
Feedwater Connection DN 40
Permeate/Concentrate Connection DN 32/32
Minimal Salt Rejection 97 %
Voltage 3 x 400V / 50Hz
Motor Power 5.5 Kw
Pre-fusing 25 A
Conductivity Range 20 – 2.000 µS/cm
Feedwater Pressure min./max. 2/6 bar
Feedwater Temperature min./max. 5/35 °c
Ambient Temperature Max. 40°c
Weight 480 kg
Depth 790 mm