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Reverse Osmosis – ND and NDFU Series 1

You are here : Home | Products & Systems | Reverse Osmosis | Herco Range | Soft Water Feed ND & NDFU | Series 1


 

Reverse Osmosis – ND & NDFU Series 1

Reverse Osmosis – ND and NDFU Series 1

ND and ND/FU Series: 600 – 1500 l/h Standard RO Systems.

Stand-type unit for desalination of softened drinking water according to German drinking water regulations (free chlorine not detectable), operating on the principle of reverse osmosis. With RO 1000 controller and vertical 4” membranes.

Stainless steel base frame with plastic front panel housing the instruments and controls. Special inlet filter with 5 μm-filter cartridge and 2 pressure gauges, High pressure pump, low-noise, multi-stage centrifugal type (incl. Frequency converter for ND/FU systems), Low energy wound modules with energy saving PA/PS composite membranes in GRP pressure vessels with inliner.

ND and ND/FU  Series 1 Specification

Stainless steel base frame with plastic front panel housing the instruments and controls. Special inlet filter with 5 μm-filter cartridge and 2 pressure gauges, High pressure pump, low-noise, multi-stage centrifugal type (incl. Frequency converter for ND/FU systems), Low energy wound modules with energy saving PA/PS composite membranes in GRP pressure vessels with inliner. Valves and instruments including feed water sampling valve, solenoid inlet valve, feed water pressure switch, permeate and concentrate flow meter, vibration-resistant pressure gauges for pump and concentrate pressure, stainless steel valves for adjustment of permeate and concentrate flow rate.

Microprocessor control system, as described below, electrical switchgear for control of the high-pressure pump, lockable main switch, connecting cable (3 m) with 16 A – 6 h CEE five-pole plug. Unit completely wired and pre-assembled and ready for installation. Electrical equipment in accordance with VDE 0100

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 pre-alarm, 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). part 600, VDE 113 part 1.

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 operation. The permeate recovery depends on the raw water quality and the type of pre-treatment.

User Manual

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