Reverse Osmosis Machine 4500 GPD - USA

Product Description

A quality reverse osmosis machine is designed to deliver high quality service by removing massive amounts of salt and other impurities from wells, lakes, rivers, and the ocean through a process called 'reverse osmosis". The process of reverse osmosis deals with the use of a high pressure pump which applies extreme pressure to the high saline concentrated side of a semi-porous membrane, combatting a natural process called "Osmosis". Naturally, osmosis transports salt through a semi-porous membrane from a region with low saline concentration to a region with high saline concentration. Its goal is to gain an equal quantity of saline concentration on both sides of the membrane. With the use of the high pressure pump, reverse osmosis comes in to direct osmosis to the opposite direction. The pump applies high pressure to the highly concentrated saline side of the membrane, pushing salty water and other impurities across the membrane, only allowing water molecules to flow through. Salt and the impurities are rejected and later thrown into the drain on the concentrate side. In the end, we obtain purified water with 99% less dissolved salts on the permeate side of the membrane. 

Date: October 2012

Country: United States

System/Product: Reverse Osmosis Machine

Component & Brands:
- RO system (RO-200 series: BW-4.5K-340)
- Multimedia filters
- Antiscalant chemical dosing system
- Microprocessor control panel 


Brackish water is water that is taken from estuaries and river openings. It salt concentration falls in between fresh water and seawater. Not as pure as fresh water, yet not as salty as seawater. Its mild salty concentration is discouraged for human consumption. To generate purified water from brackish water, a water filtration system relies on a method called "reverse osmosis" for assistance.



A reverse osmosis machine  was supplied to a major company in TX, USA. The machine came complete with a multimedia filter and an antiscalant chemical dosing system. The BW-4.5K-340 machine was designed to produce 4,500 GPD at a maximum 9,000 PPM feed water TDS and is controlled by a microprocessor. The machine was selected from our RO-200 Series. From its initial start-up, the machine has been working properly with minimal trouble-shooting.



  • Minimal civil work and construction
  • Small footprint
  • Plug and play installation
  • High-quality components (Grundfos pumps, DOW Filmtec membranes, Codeline vessels, Pure Aqua microprocessor control panel)
  • High recovery design
  • High rejection membranes
  • Low energy and chemical consumption



Reverse Osmosis Machine 4500 GPD - USA - Case Study [/custom-documents]

(1 review) Write a Review
  • 5
    High efficiency

    Posted by Victor L. on Jan 19th 2019

    I have been dealing with Pure Aqua for over 10 years and they have proved to be very reliable with excellent products that always helped us in our projects. Thank you Pure Aqua and all the best.

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