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Sub Title: 200,000 to 900,000 GPD Brackish Water RO

The RO-500 Series is considered to be one of the most compact industrial reverse osmosis systems on the market. Its user-friendly design makes the maintenance simple and straightforward, and the operation of the RO-500 is easy for anyone to learn. Designed on a powder-coated, carbon steel frame, it is durable enough to handle the wear of long-term use. You can count on your RO-500 Series Reverse Osmosis system for decades to come. Designed with state-of-the-art energy-saving membrane elements, the RO-500 Series also minimizes energy use, doing as little damage to the environment as possible.

SKU: RO-500 Category: Membrane & Reverse Osmosis Systems > Industrial & Commercial Reverse Osmosis Systems Brand: Pure Aqua Other Names: Brackish Water RO Purification System, Industrial BWRO Treatment Plant, Brackish Well Water Purifier, BW Reverse Osmosis Machine
4.5 Stars 4.83 stars - based on 2 Reviews.


Every one of our RO-500 Series reverse osmosis systems are designed and manufactured in the USA. When you buy the RO-500, you are also purchasing decades of quality cusomer service and assistance. Municipalities and industrial facilities can use RO permeate from the RO-500 as a consistently pure drinking water supply and to transform drinking water to high purity water for industrial use at microelectronics, food and beverage, power, marine and pharmaceutical facilities. The RO-500 Reverse Osmosis System from Pure Aqua, Inc. delivers high performance at low life-cycle costs. Your RO-500 Series Reverse Osmosis system will arrive at your facility ready to run with all components installed and ready for action. Pure Aqua, Inc. continues to set the standards in reverse osmosis systems and the water treatment industry with the RO-500 Series.



Operation Specifications:
  • Max. feed water temperature: 42°C
  • Equipment upgrade for TDS over 5,000 ppm
  • Hydrogen Sulfide must be removed
  • Turbidity should be removed
  • Feed water TDS: 0-1,000 ppm
  • Hardness over 1 GPG requires antiscalant dosing
  • Max. Silica Tolerance: 60 ppm @ 60% recovery
  • Max. Iron content: 0.05 ppm
  • Feed water pressure: 20 to 80 psi
  • Operating pressure: 150 to 250 psi
  • pH tolerance range: 3-11
  • Operate at higher TDS by lowering recovery

Industrial Brackish Water Reverse Osmosis Systems RO-500
Model Number Permeate Flow Rate Quantity of 8" Membranes Motor Rating at 1,000 ppm
GPD M3/D 60Hz (hp) 50Hz (kw)
TW-200K-4780 200,000 758 28 30 22
TW-225K-5680 225,000 852 30 30 22
TW-270K-6680 270,000 1,023 36 40 30
TW-320K-7680 320,000 1,212 42 40 30
TW-360K-8680 360,000 1,364 48 50 37
TW-410K-9680 410,000 1,553 54 60 37
TW-450K-10680 450,000 1,705 60 60 45
TW-500K-11680 500,000 1,894 66 60 45
TW-550K-11780 550,000 2,083 77 75 45
TW-600K-13780 600,000 2,273 91 75 55
TW-700K-14780 700,000 2,652 98 100 75
TW-800K-16780 800,000 3,030 112 2X60 2x37
TW-900K-18780 900,000 3,409 126 2X60 2x37
For more information, please see our PDF in the "Download" tab

Note: If the feed water TDS exceeds 1,000 ppm, the system model number changes to BW-XXXK-XXXX, and a suffix is added to the end of the model number: “-3” is added if the TDS is 3,000 ppm or less, and “-5” is added if the TDS is 5,000 ppm or less. Example: Required system to produce 320,000 GPD with a feed water TDS of 5,000 ppm, the corresponding model number is: “BW-320K-7680-5”.



Standard Features:
Available Options:
  • Powder coated carbon steel frame
  • 8” TFC spiral wound membranes
  • Stainless steel multi-stage pump with TEFC motor
  • FRP membrane housing
  • 5 micron cartridge prefilter
  • 460V/3Ph/60Hz power supply
  • PLC based control panel
  • Programmable time delay and set points
  • Status indicators
  • Motor starter
  • NEMA 12 enclosure
  • Low pressure switch
  • High pressure switch
  • Liquid filled pressure gauges
  • Permeate conductivity monitor
  • Permeate & concentrate flow meters
  • Post deionization polishers
  • Remote monitor / control option
  • Feed water conductivity monitor
  • Membrane cleaning skid
  • Automatic hourly flush
  • Feed / Permeate blending
  • Export crating
  • 380-415V/3Ph/50Hz power supply
  • 220V/3Ph/60Hz power supply
  • Product tank level controller switch
  • Feed pH controller with sensor
  • Feed ORP controller with sensor
  • Water and hour meters
  • Chemical dosing systems
  • Media and Iron prefiltration systems
  • Ozonation and UV sterilization systems
  • Water softeners


There are a number of applications and industries that an RO-500 Series Industrial Reverse Osmosis System by Pure Aqua are ideal for. These include:


RO-500

Services: 5 Stars 5 Stars
Quality: 5 Stars 5 Stars
Delivery: 5 Stars 5 Stars
I purchased an RO system from Pure Aqua, it runs great since the day I bought it, I high recommend Pure Aqua.

by: Omar Khalifa from


Produces more water faster

Services: 4 Stars 4 Stars
Quality: 5 Stars 5 Stars
Delivery: 5 Stars 5 Stars
Good product, there is no wasted water., recovery is quick after changing filters. Well the cost was more than that of a conventional unit. But we are happy, in addition, the system produces more water faster and we never run out of drinking water.

by: Jerry W. from






Video on Industrial BWRO Systems Canada

Two Industrial BWRO Systems were manufactured and designed for an open pit mine in Canada. The objective was removal of Nitrate and Selenium to meet stringent environmental discharge limits. The feed capacity was 1.7 MGD, split into two identical systems at a maximum 1,000 ppm feed water TDS. These Industrial BWRO Systems were selected from our RO-500 series and came complete with an advanced PLC, cleaning and flushing systems, and anti-scalant dosing systems. They included two hi..more->