1812 Nanofiltration Membrane 75GPD

In daily drinking water, people seek not only safety but also convenience and sufficient supply. The 1812 Nanofiltration Membrane 75 GPD is designed precisely for this purpose. With its standard 1812 size, it easily fits most household water purifiers. Though compact, it can steadily produce about 280 liters of purified water within 24 hours.

What does this mean? It means a household of three to five people can be fully supported-from morning tea or coffee to evening cooking and direct drinking. If used solely for drinking, it can even supply eight to ten people at the same time. Every drop of water passes through efficient membrane layers that remove impurities and heavy metals, leaving only clean taste and reliable health protection.

The 1812 Nanofiltration Membrane 75 GPD focuses not only on purity but also on comfort in daily life. It operates under typical municipal water pressure, requiring no complex modifications. It is easy to maintain and offers long-lasting performance. Choosing this membrane means ensuring safe, enjoyable drinking water for your family every day-and embracing an essential component of a modern, healthy lifestyle.

It removes organic matter, residual chlorine, heavy metals, bacteria, and most divalent and higher-valence ions from water. At the same time, it selectively retains certain monovalent ions (such as sodium and potassium), enhancing both the taste and nutritional value of the drinking water.

• Operates at a typical pressure of 3–6 bar, making it more energy-efficient than RO membranes.
• Optimised membrane materials and structure ensure long-term, stable water production.

Household membranes are typically designated by their standard size codes, such as 1812, 3012, etc. The dimensions include:

Outer Diameter (OD): The external width of the membrane element.

Length: The total length of the membrane element.

Connection Type / Port Size: The interface for installation in household water purifiers.

Pore Size Range:

• Nanofiltration membranes typically have pores ranging from 1 to 2 nanometres, positioned between ultrafiltration membranes (0.01–0.1 μm) and reverse osmosis membranes (approximately 0.1 nm).

Separation Mechanisms:

• Sieving Effect: Large molecules, such as organic compounds and colloids, are physically intercepted by the membrane pores.
• Charge Effect: The membrane surface is usually negatively charged, which electrostatically repels divalent and multivalent ions (e.g., calcium, magnesium, sulfate), while allowing partial passage of monovalent ions (e.g., sodium, potassium).
• Solution-Diffusion Theory: Small molecules dissolve at the membrane surface and then diffuse through the membrane layer.

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