Spectra LB 4000F

The LB-4000 is an extremely energy efficient re-verse osmosis desalination plant designed for sta-tionary or industrial applications. The unit can treat high salinity brackish water using just a frac-tion of the energy of conventional small plants. In fact, the Spectra LB machines are so efficient they are often powered from renewable energy. This unit is built using Spectra's revolutionary and pro-prietary new Spectra Pearson pump. The plants are supplied with a rugged stainless steel frame, Spectra Pearson Pump coupled to Spectra's pro-prietary Spectraflux™ membrane assembly, mi-croprocessor control system with Burkert product water diversion valve, pre-filtration system, auto-mated freshwater flushing system and a motor speed control for total system command. Touch-pad display and controls are mounted in sealed enclosure. Service ports with three way valves are included to ease maintenance procedures.


The Spectra Pearson Pump is a breakthrough pump design. This unique high pressure pump combines feed stream pumping and energy re-covery into a single unit. The "Energy Recovery" feature of the Pearson Pump takes the energy entrained in the brine reject stream from the RO mem-branes and recaptures it, dramatically increasing the overall efficiency. The system does not require continuous monitoring and pressure adjustment as it stays inherently in balance at all times, providing a constant product flow and recovery ratio. The product flow can be controlled via the vari-able speed drive to the motor. Having a fixed recovery ratio is critical for brackish water applications as it pre-vents operators from tampering with the recovery ratios and damaging the membranes.
The Spectra Pearson Pump is manufactured from engineered com-posites and super duplex stainless steel for extreme corrosion resistance.



System Features

  • SpectraPearson Pump-the most energy efficient desalination pump on the planet!
  • The Spectra Pearson Pump integrated with Spectra's exclusive oil filtration system for extended service periods.
  • Microprocessor based controller with keypad display to monitor and control all functions. Readouts include digital based flow and pressure as well as filter condition and operational hours. A conductivity control-ler monitors product water quality and automatically rejects poor prod-uct water on startup. A high quality Burkert diversion valve with manual bypass is standard. Tank switches can be integrated to automatically start and stop the system.
  • Motor speed control with external heat sink capable of operating in ex-treme environments.
  • Fixed recovery ratio prevents operator from tampering with recovery.
  • Three way valves and service ports integrated into the system for ease of maintenance.
  • 20 and 5 micron Spinring™Industrial prefilter set protects the mem-branes. Water delivery and pretreatment is site specific and will be engi-neered for your particular application. Multimedia filters and Ultra fil-tration options are available from Spectra.
  • Spectra engineered pressure vessels with proprietary Spectraflux ™ membranes.
  • Rugged 304 Stainless steel welded frame.
  • Integral tank and pump for automatic freshwater flushing of the mem-branes is included.
Specifications LB-4000F
Produce Fresh Water
180 GPH (685 LPH)
Treat Water
1000-24,000 TDS
Power Consumption
600-1400W based on TDS
Feed water recovery
Salt rejection
99.4% minimum
Feed flow
6 GPM (23 LPM)
Required inlet pressure
20 PSI (1.4 bar)
Membranes Spectraflux TFC 4"x40" Seawater RO
4 ea.
Pearson pump
constructed of glass epoxy composites and super duplex SS
2ea. 20" 20 micron, 2ea. 20" 5 micron.
System Dimensions

57"L x 24D x 45"H Approx 400 Lb
145cm L x 115cm W x 45cm H Approx 180 kg
System Operation Voltage
24V DC,48VDC, 120VAC, 240AC
50/60 hz

Download PDF Brochure


| Products
| Supports
| Technology
| Contact
© 2011 EcoHydro Solutions Co., Ltd. Phone: (66)-81-318-9798, Fax (66)-77-285-080