Reverse Osmosis Membrane Model ESNA1-LF-LD Applied In Pharmaceutical Water

Introduction

LEFILTER, a leading Chinese manufacturer specializing in fluid purification solutions, introduces the Reverse Osmosis Membrane Model ESNA1-LF-LD. Engineered for high-efficiency desalination and water purification, this membrane is ideally suited for pharmaceutical, food & beverage, and industrial applications requiring ultra-pure water. As a direct replacement for Hydranautics’ ESNA1-LF-LD, the model delivers superior performance, durability, and compliance with international standards such as USP and EP.

Technical Parameters

The ESNA1-LF-LD is a low-energy, high-performance reverse osmosis (RO) membrane designed for challenging water sources. Key specifications include:

Working Principle

The ESNA1-LF-LD operates based on the reverse osmosis principle:

1. Pre-Filtration:
   

• Feed water passes through a 5-μm Security filters to remove particulates.

2. Reverse Osmosis:
   

• High-pressure pumps force water through the semipermeable polyamide membrane, which rejects dissolved solids (e.g., salts, organics) and allows pure water to pass.

3. Separation:
   

• Concentrated contaminants  are discharged, while purified water is collected for downstream use.

Performance & Advantages

1. High Salt Rejection:
   

• 99.5% NaCl rejection ensures ultra-pure water for critical applications.

2. Low Energy Consumption:
   

• Operates at 150 psi (10.3 bar), reducing energy costs by up to 30% compared to traditional membranes.

3. Anti-pollution design：
   

• Hydrophilic surface and optimized flow channels minimize fouling, extending service life and reducing cleaning frequency.

4. Wide Compatibility:
   

• Fits standard 4” pressure vessels and integrates seamlessly with existing RO systems.

5. Chemical Resistance:
   

• Resists chlorine (up to 1,000 ppm·hrs), acids, and alkalis, ensuring durability in harsh environments.

Product Structure

The ESNA1-LF-LD features a spiral-wound design with the following components:

1. Polyamide Composite Membrane:
   

• Thin-film composite (TFC) layer for high rejection and permeability.

2. Support Layer:
   

• Non-woven fabric for structural integrity.

3. Feed Spacer:
   

• Creates turbulence to enhance mass transfer and reduce fouling.

4. Glass Fiber Reinforced Polypropylene (GFRP) Housing:
   

• Corrosion-resistant and pressure-tolerant.

5. O-Ring Seals:
   

• Ensure leak-proof operation and prevent bypass flow.

Application in Pharmaceutical Water Treatment

The ESNA1-LF-LD is critical for pharmaceutical applications:

1. Purified Water (PW) and Water for Injection (WFI):
   

• Removes endotoxins, bacteria, and particulates to meet USP, EP, and JP standards.

2. Process Water:
   

• Ensures high-quality water for formulation, cleaning, and equipment rinsing.

3. Wastewater Recycling:
   

• Recovers solvents and reduces wastewater discharge, supporting sustainability goals.

Other Industrial Applications

1. Food & Beverage Industry:
   

• Clarifies juices, wines, and dairy products; removes pathogens for shelf-life extension.

2. Power Generation:
   

• Treats boiler feedwater to prevent scaling and corrosion.

3. Electronics Manufacturing:
   

• Produces ultra-pure water for semiconductor fabrication.

4. Oil & Gas:
   

• Desalinates produced water for reuse in hydraulic fracturing.

Conclusion

LEFILTER’s Reverse Osmosis Membrane Model ESNA1-LF-LD combines cutting-edge technology with robust construction to deliver reliable, high-quality water purification for pharmaceutical and industrial applications. Its advanced features, energy efficiency, and compliance with international standards make it the ideal choice for businesses seeking sustainable and cost-effective solutions.

Common Part Numbers