Product Description

For continuous or heavy-duty service in marine applications on and off shore, Pure Aqua manufactures a full line of designed seawater desalination systems.

Seawater Reverse Osmosis

Seawater Reverse Osmosis (SWRO) is a reverse osmosis desalination membrane process that has been commercially used since the early 1970s. The typical single pass SWRO system consists of the following components:

Intake: well or open water

Pre-treatment: Filtration and chemical dosing

High-pressure pump: to achieve the needed pressure

Membrane assembly: to perform the desalination process

pH adjustment: to adjust the alkalinity or acid level

Disinfection: to prevent any bacterial or organic growth

Pure Aqua, Inc. has manufactured and supplied hundreds of commercial and industrial seawater reverse osmosis systems with feed water TDS up to 45,000 ppm.

Customizable RO System Capacity

Our SWI Series is available with capacities ranging from 8,000 GPD to 660,000 GPD and a maximum feed water TDS of 42,000 ppm. We offer standard SWI Series units as well as customizable to fit you water application needs. From your five star resort to the world's largest desalination plant in the United Arab Emirates, Pure Aqua is ready and able to provide only the best in industrial desalination systems.

Pure Aqua’s Seawater Reverse Osmosis Systems are capable of removing salts as well as other impurities such as bacteria, sugars, proteins, dyes and constituents that have a molecular weight greater than 150-250 Dalton. Pure Aqua supplies a full line of standard and customizable Seawater Reverse Osmosis systems, all of which are engineered using advanced 3D computer modeling and process design software for accurate and customized solutions.

Questions & Answers

What is a desalination system?

Desalination systems have become an important pillar of the world’s freshwater supplies. Desalination provides an alternative to insufficient clean water production and natural causes which exacerbates this issue such as droughts. Independent of weather patterns, desalination systems are efficient in helping countries or companies in reaching their water demands.



Desalination systems utilize reverse osmosis to purify unwanted contaminants such as salt and minerals from untreated water. This process works through applying high-pressure pumps that force the concentrated water through semi-permeable membranes which consist of small pores that prevent the impurities from passing through. What results from the reverse osmosis system is fresh, clean water that is free of its pollutants which are simultaneously discharged.



Desalination systems are generally used in large-scale plants that must deal with regulatory, budgetary, and practical issues to produce economical and eco-friendly water distribution. There are hundreds of desalination plants throughout the world that are depended upon by regions for economic activity and clean water supplies. Desalination continues to provide solutions that prove its worth by meeting challenging criteria with stellar answers and productivity.

Where are desalination systems becoming increasingly popular?

While desalination systems are becoming a common application throughout the world, certain regions have higher concentrations due to greater water demands. There are estimates of up to 18,000 existing desalination plants that utilize these systems globally, generating more than 25,000 GPD. Almost half of these desalination systems exist and operate in the Middle East and North Africa. This occurrence is unsurprising due to the hot and arid climate of these particular regions.



Although desalination systems continue to grow in usage in those regions, it is expected to intensify in development over the next few decades throughout the United States, Asia, and Latin America. Technology advances in these areas will eventually drive down the percentage of energy needed for water production, which ultimately results in more active desalination systems.

Are desalination systems cost-effective?

Desalination systems have been known to be very expensive to build and maintain over a long period of time. However, recent enhancements in water treatment components which includes reverse osmosis membrane advancements (high rejection, low energy costs) and energy recovery devices, have made the associated costs of desalination plants much lower. To such an extent that desalination systems have now become a cost-effective alternative source of water distribution. For this reason, most regional and state governments have incorporated them into their water plans as tools to help meet the present and future water goals.

[custom-specifications]

Operation Specifications Max. feed water temperature: 42°C

Equipment upgrade for TDS up to 50,000 ppm

H2S, turbidity and organics must be removed Feed water TDS: 10,000-42,000 ppm

Operating pressure: 700 to 1,000 psi

pH tolerance range: 3-11 Feed water pressure: 40 to 80 psi

Antiscalant dosing is required

Max. Iron content: 0.05 ppm

Model No. Permeate Qty of 8" Membranes

(single stage) Motor HP

at 1000 ppm Approx.

Weight (lbs) Dimensions GPD m3/D 60 HZ 50 HZ SW-8.0K-1280 8,000 30 2 15 15 2,600 120"x42"x72" SW-12K-1380 12,000 45 3 20 25 2,600 160"x42"x72" SW-16K-1480 16,000 61 4 25 30 2,700 195"x60"x72" SW-24K-2380 24,000 91 6 40 45 3,200 160"x60"x72" SW-32K-2480 32,000 121 8 60 65 4,200 195"x72"x72" SW-48K-2680 48,000 182 12 75 80 5,600 280"x72"x72" SW-64K-4480 64,000 242 16 60 65 6,500 195"x72"x72" SW-72K-3680 72,000 273 18 60 65 12,000 280"x72"x80" SW-96K-4680 96,000 363 24 85 100 13,000 280"x72"x80" SW-112K-4780 112,000 424 28 100 110 14,000 350"x72"x80" SW-136K-5680 136,000 515 34 110 120 15,000 280"x72"x80" SW-168K-6780 168,000 636 42 120 130 16,000 350"x72"x80" SW-196K-7780 196,000 742 49 130 150 16,500 350"x72"x80" SW-224K-8780 224,000 848 56 160 175 17,000 350"x72"x79" SW-252K-9780 252,000 954 63 175 190 18,000 350"x72"x79" SW-280K-10780 280,000 1060 70 190 190 19,000 350"x72"x79" SW-317K-12780 317,000 1200 84 190 290 20,000 350"x85"x80" SW-420K-15780 420,000 1590 105 290 320 21,000 350"x85"x80" SW-500K-18780 500,000 1893 126 320 320 22,000 350"x85"x81" SW-660K-18880 660,000 2500 144 350 350 27,000 395"x85"x81" For more information, please view/download our "Data Sheet"

[/custom-specifications]

[custom-features]

Standard Features Available Options Powder coated steel frame

Heavy duty 5 micron cartridge prefilter

Seawater resistant SS pump

Microprocessor/PLC based control panel & VFD

Glycerin-filled 316 SS prefilter pressure gauges

Product & reject flow meters

TFC spiral wound membranes

FRP membrane housings

460V/3Ph/60Hz power supply

Low & high pressure switches

Permeate TDS monitor

Stainless steel high pressure piping

Stainless steel throttling valve for reject stream

Automatic feed shut off valve

Energy recovery on 64K GPD and larger Booster pump

380-415V/3Ph/50Hz power supply

Product tank level switch

pH controller with sensor

ORP controller with sensor

Hour meter

Cleaning skid

50 micron bag filter for open intake

Carbon prefilter

Multimedia prefilter

UV sterilizer

Custom designed units

Export crating

Chemical dosing units

[/custom-features]

Hospital Hotel Marine Military Mining The ideal applications for an Industrial Seawater RO system include: Oil Tankers

Island-Based Businesses

Villages & Cities

Cargo Ships Coastal Developments

Hotels & Resorts

Seaside Work Sites Work Boats

Fish Processing Plants

Seaside Villas [custom-usage][/custom-usage]