UO-D 3000 ND
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UO-D 7000 ND/FU

Reference: 5110010073
Description:For desalination of softened drinking water according to drinking water regulations (free chlorine not detectable). Mounted on a Stainless steel skid with horizontal membrane housing 8″

Up to 30% energy savings due to high pressure pump with frequency converter (FU) with control of permeate flow rate at constant value (PKR).

Search Name 387 035
Item Name UO-D 7000 ND/FU
Brand Herco
  • Complete unit skid mounted
  • RO Digital controller
  • Recovery: up to 75%
  • Salt rejection percentage: 97%
  • Voltage: 3 x 400V / 50 Hz
  • Digital flow meters
  • Profinet interface (option)

Unit design

  • Stainless steel main frame.
  • High pressure piping made of stainless steel with orbital weldings.
  • Special inlet filter with 5 µm-filter cartridge and 2 pressure gauges,
  • high pressure pump with frequency converter (only Series ND/FU) low noise, multi-stage centrifugal type,
  • low energy spirally wound modules with energy-effici- ent PA/PS composite membranes in GRP vessels.
  • Valves such as sampling valves for feed water and permeate (each vessel and total), diaphragm valve, stainless l steel valves to regulate the flow rate of  permeate,  concentrate and concentrate recirculation flow rate
  • Pressure sensors for pump feed pressure, operating pres- sure and concentrate pressure.
  • Flow sensors for permeate, concentrate and   concentrate recirculation flow rate.
  • Conductivity measurement permeate with temperature compensation.
  • Control cabinet with lockable main switch, electrical switchgear for control of the high-pressure pump.
  • Unit is completely wired, pre-assembled and ready for ins- tallation. Electrical equipment in accordance with VDE 0100 part 600, VDE 0113 part 1. Compressed air (oil-free) 4-6 bar required.

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 units are 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 operation. The permeate recovery depends on the raw water quality and the type of pretreatment.
Additional Options
  • Limitron 1 1/2″
  • Permeate recirculation PR10000/24
  • Concentrate rinsing KSE10000/24
  • Connector kit (ARA DN 40) for cleaning set MRA
  • PROFINET-Interface
Height 1830 mm
Membranes 8040 x 6
Controller RO Digital
Width 3870 mm
Permeate Flow 7000 l/h
Recovery 75 %
Max Operating Pressure 13.5 bar
pH Range 3 – 11
Feedwater Connection DN 40
Permeate/Concentrate Connection DN 40/32
Minimal Salt Rejection 97 %
Voltage 3 x 400V / 50Hz
Motor Power 7.5 Kw
Pre-fusing 20 A
Conductivity Range 2 – 200 µS/cm
Feedwater Pressure min./max. 2/6 bar
Feedwater Temperature min./max. 5/35 °c
Ambient Temperature Max. 40°c
Weight 600 kg
Depth 790 mm