In reverse osmosis (RO) systems, one of the most important components is the membrane holder, as it determines the safety, efficiency, and service life of the equipment.
Stainless steel: extreme resistance and high pressure
Stainless steel is one of the most recommended materials for high-pressure applications, especially in reverse osmosis systems for brackish water or seawater. Its main advantage is its mechanical strength, as it can withstand significantly higher operating pressures than fiberglass. It is also ideal in environments where corrosion is a constant risk, such as desalination plants or industries that use aggressive chemicals.
Its main benefits include:
Excellent tolerance to pressures above 1000 psi.
Longer service life.
High structural strength.
Compatibility with critical applications.
Fiberglass: lightweight, economical, and efficient for standard pressure
Fiberglass (FRP) is the most widely used material in membrane housings for moderate-pressure industrial systems. It is more economical, lightweight, and easier to install than stainless steel, making it ideal for applications such as drinking water, softened water, treated effluents, and low- to medium-pressure RO.
Which one to choose depending on pressure?
Less than 450 psi: fiberglass is the optimal choice.
Between 450 and 1000 psi: it depends on the quality of the FRP, but stainless steel offers greater safety.
Over 1000 psi (seawater): stainless steel, without exception.
Conclusion
The choice between stainless steel and fiberglass should be based primarily on operating pressure, water type, budget, and environmental conditions. Analyzing these factors ensures a safe, durable, and suitable membrane holder for your water treatment system.
American Water Solutions, LLC., is a family business based in Texas. We manufacture reverse osmosis water treatment systems for every application from domestic to industrial.
