Thin Film Flexible Nanofiltration Membrane Water Treatment Industrial Nanofiltra

Product Specification

Nanofiltration Membrane For Water Treatment

Product Overview

The Nanofiltration (NF) Membrane is an advanced membrane separation technology positioned between ultrafiltration (UF) and reverse osmosis (RO).
It features pore sizes of approximately 0.001 μm, enabling selective removal of multivalent ions, organic matter, and hardness-causing substances while allowing partial passage of monovalent ions such as Na⁺ and Cl⁻.
This selective separation capability makes NF membranes ideal for water softening, color removal, organic rejection, and partial desalination in both industrial and municipal applications.

Working Principle

Nanofiltration operates on a pressure-driven selective separation principle.
When feed water is pressurized, small molecules like water and monovalent ions pass through the membrane, while larger molecules, multivalent ions, and organic compounds are rejected.
The NF process achieves moderate salt rejection (typically 50–90%) and high organic rejection under lower operating pressures than reverse osmosis, offering both high efficiency and energy savings.

Main Components

• NF Membrane Sheet: Made of polyamide (PA) thin-film composite material with excellent selectivity and chemical resistance.

• Feed Spacer: Ensures uniform feed distribution and reduces concentration polarization.

• Permeate Carrier Layer: Supports stable water flow and minimizes pressure loss.

• Module Housing: Typically FRP or PVC, providing durability and corrosion resistance.

• End Caps & Connectors: Sealed design to ensure easy installation and reliable operation.

Features

• Selective Ion Rejection: Removes multivalent ions (Ca²⁺, Mg²⁺, SO₄²⁻) while allowing partial passage of monovalent ions.

• High Organic Removal: Effectively removes color, organic matter, and macromolecular contaminants.

• Low Operating Pressure: Achieves high permeate flux under lower pressure compared with RO membranes.

• Energy Saving: Reduced power consumption with stable operation and high recovery rate.

• Excellent Chemical Stability: Resistant to oxidation and compatible with standard cleaning chemicals.

• Anti-Fouling Design: Smooth membrane surface minimizes scaling and biofouling.

• Long Service Life: Durable polyamide composite structure ensures long-term performance stability.

• Flexible Integration: Fits standard 4040 and 8040 membrane housings for easy system retrofitting.

Applications

• Water Softening: Selective removal of hardness ions (Ca²⁺, Mg²⁺).

• Drinking Water Purification: Reduction of organic matter, color, and odor.

• Industrial Process Water: Pre-treatment for RO systems or high-quality process water production.

• Wastewater Reuse: Removal of organic and hardness contaminants in reclaimed water.

• Food & Beverage Industry: Concentration and purification of juices, dairy, and process water.

• Textile and Dyeing Industry: Color removal and reuse of process water.

Optional Configurations

• Membrane Material: Polyamide Thin-Film Composite (TFC)

• Pore Size Range: ~0.001 μm

• Operating Pressure: 100–600 psi (customizable)

• Salt Rejection Rate: 50–90% depending on feed composition

• Module Sizes: 4040, 8040, or customized

• Feed Type: Tap water (TWNF) / Brackish water (BWNF) / Industrial wastewater (IWNF)

• Housing Color: White, blue, or gray

• End Connections: Standard or customized fittings