RO (reverse osmosis) and SWRO (seawater reverse osmosis) units are water treatment systems that use reverse osmosis technology to remove impurities and contaminants from water.

Reverse osmosis is a process that involves applying pressure to water to force it through a semi-permeable membrane. The membrane allows water molecules to pass through, while blocking the passage of dissolved salts, minerals, and other impurities. The result is purified water that is free of most impurities.

RO units are commonly used to purify water from sources like rivers, lakes, and groundwater. They are also used in industrial and commercial applications to purify process water, as well as in households to purify drinking water.

SWRO units, on the other hand, are designed specifically to treat seawater. Seawater contains high levels of dissolved salts and minerals, which make it unsuitable for most applications. SWRO units use a pre-treatment system that removes large particles and debris from the seawater before it enters the reverse osmosis system. The reverse osmosis system then removes dissolved salts and other impurities from the seawater, producing purified water that is suitable for use in various applications.

RO and SWRO units are typically made of materials like mild steel (MS), stainless steel (SS), and fiber-reinforced plastic (FRP). The selection of the appropriate material depends on factors such as the application, operating conditions, and budget.

In summary, RO and SWRO units are water treatment systems that use reverse osmosis technology to remove impurities and contaminants from water. RO units are used to purify water from sources like rivers, lakes, and groundwater, while SWRO units are designed specifically to treat seawater. They are typically made of materials like MS, SS, or FRP