Seawater Desalination System — SWRO Watermaker for Boats, Islands, Resorts and Coastal Communities

The FGW-SWRO series is a turnkey seawater reverse-osmosis (SWRO) watermaker that converts raw ocean and coastal water into safe, WHO-standard drinking water on site — no trucked-in freshwater, no bottle logistics, no dependence on unreliable municipal supply. Built on a marine-grade high-pressure pump, SW4040 seawater membrane elements and a corrosion-resistant stainless frame, it is engineered for continuous duty in salt-air environments aboard vessels, on islands, at resorts and offshore, and is factory-assembled, pre-tested and ready to connect.

Product Highlights

•  Turnkey plug-and-play. The skid arrives fully assembled and pre-tested — connect seawater intake, brine discharge and power, and it is producing fresh water within 2 hours. No specialist technician required.

•  Marine-grade SWRO core. Multi-stage SS316 high-pressure pump (55–65 bar), two SW4040 seawater membrane elements in FRP vessels and an SS304 anti-corrosion frame, built for continuous 24/7 duty in harsh salt-water conditions.

•  Quartz-sand filter with auto-backwash. A built-in sand-media filter with an electronic control valve automatically flushes trapped sediment back to sea, extending RO membrane service life by up to 40% and cutting replacement cost.

•  One unit serves ~200 people a day. At 0.5 CMH (500 L/h) it yields up to 12,000 L/day — enough for a 150-room resort, a 30-crew vessel or a 200-person coastal community, with payback typically under 18 months versus importing freshwater.

•  Metric, grid-flexible power. 380 V / 50 Hz / 3-phase standard (220 V optional), about 8–10 kWh per m³ of fresh water; solar-ready configurations for off-grid islands and remote sites.

•  Verified and supported. Every system ships with a mechanical test report and video outgoing-inspection, a 12-month warranty on pump, membranes, control valve and electricals, and spare parts dispatched within 48 hours.

Where It Is Used

The FGW-SWRO platform is specified wherever a site depends on seawater and needs reliable on-site freshwater.

•  Islands, atolls and remote coastal communities

•  Coastal hotels, beach resorts and marinas

•  Fishing, crew, cruise and patrol vessels

•  Offshore platforms and subsea / oil-and-gas bases

•  Drinking-water buffering for municipalities and field camps

•  Marine, aquaculture and yachting facilities

Suitable feed sources: open-ocean and coastal seawater (35,000–45,000 ppm TDS). Brackish or high-turbidity intakes are sized on request.

Feed Water & Site Requirements

Before ordering, confirm the intake water and site services fall within the limits below — this protects membrane life, output and warranty.

Key Specifications

Capacity Options

One proven platform, two standard duties — plus custom and parallel skids for larger demand.

System Configuration & Control

Skid & Process Assembly

•  Quartz-sand media filter with electronic auto-backwash valve

•  5 µm cartridge security filter upstream of the RO stack

•  Marine-grade multi-stage SS316 high-pressure pump (55 – 65 bar)

•  2 × SW4040 seawater RO elements in FRP pressure vessels on an SS304 skid

•  Fresh-water, brine and flush manifolds with instrumented pressure points

•  Inline product-TDS monitor for drinking-water release control

Control Panel & Automation

A single PLC control cabinet runs, monitors and protects the plant:

•  PLC automatic run with start / stop, reset and local indication

•  Inline TDS monitor with drinking-water / divert threshold

•  Low-pressure (intake) and high-pressure (pump / RO) protection interlocks

•  Auto-flush and auto-backwash sequencing for the sand filter

•  Electrical protection through breakers, contactors and thermal relays

•  Optional remote-monitoring tie-in for unmanned island sites

Standard supply 380 V / 50 Hz / 3-phase; 220 V and 60 Hz on request. Final rating is confirmed against your grid at quotation.

Buyer & Engineer FAQ

What does the FGW-SWRO-500 actually produce?

At 25 °C and 35,000 ppm feed TDS it delivers 500 liters per hour — about 10,000–12,000 L/day of WHO-standard drinking water. Output falls slightly in colder water, so we size the recommendation to your local sea conditions.

How many people can one unit serve?

A single FGW-SWRO-500 covers a 150-room resort, a 30-crew fishing or crew vessel, or a 200-person coastal community at normal consumption.

How long does installation take, and do we need a specialist?

The system arrives fully assembled and pre-tested. Installation means connecting three lines — seawater intake, fresh-water output and brine discharge — plus a standard power supply. Most customers finish within 2–4 hours using the English video guide; live WhatsApp support is offered for large orders.

How often do the RO membranes need replacing, and what does it cost?

With proper pre-treatment the seawater membranes last 2–3 years. The auto-backwash sand filter removes sediment before it reaches them. Replacement membranes are roughly 15–20% of the system price, so we recommend stocking one spare set with the initial purchase.

Can it handle poor seawater — sediment, algae or oil?

The sand pre-filter clears suspended solids down to 50 microns. For algae-heavy or oil-contaminated intakes we add an optional multimedia filter or oil–water separator; our engineers review your water-quality report and configure the pre-treatment stage accordingly at no extra design charge.

What power supply and energy use does it need?

Standard configuration is 380 V / 50 Hz / 3-phase (220 V optional), about 5 kW installed and roughly 8–10 kWh per m³ of fresh water. Solar-ready setups are available for off-grid islands and remote sites.

What warranty is offered and what does it cover?

A 12-month comprehensive warranty covers the high-pressure pump, RO membranes, electronic control valve and all electricals. Pre-filter media is a consumable and excluded. Claims are processed within 48 hours with photo or video verification, and replacement parts ship immediately — you do not wait to return the faulty item first.

Request a Quotation

Tell us your intake location, target fresh-water output (CMH / m³/day) and site voltage, and the FG Water engineering team will size the right FGW-SWRO configuration, issue a full specification sheet and quote a landed, ready-to-install seawater desalination system.

Request a Quote  →  [email protected]   ·   www.fgwater.com   ·   FG Wate