Datasheet summary
LFC1
Engineering summary from PDF text extraction for LFC1. Verify every value with the OEM datasheet.
Summary
Product Identification
The LFC (Low Fouling Composite) membrane series represents an advancement in polymer membrane technology, designed for enhanced resistance to fouling. The membrane material is a durable aromatic polyamide.
The series includes two product types: LFC1 and LFC2.
- LFC1: Features a neutral surface charge, unlike negatively surface-charged traditional composite RO membranes.
- LFC2: Features a cationic surface charge.
Models available include 8-inch elements (LFC1, LFC2) and 4-inch elements (LFC1-4040, LFC2-4040). In 1998, all 4040 elements were fiberglass wrapped.
Performance Specifications
Elements are tested at 225 psi, 25 °C, 15% product recovery, pH 6.5-7.0, on water of 1500 ppm NaCl for 30 minutes.
| Designation | Area - ft² (m²) | Flow - GPD (m³/d) | % Minimum Rejection |
|---|---|---|---|
| 8 inch models | |||
| LFC1 | 365 (33.9) | 10,000 (37.8) | 99.0 |
| LFC2 | 365 (33.9) | 11,000 (41.6) | 95.0 |
| 4 inch models | |||
| LFC1-4040 | 85 (7.9) | 2,300 (8.7) | 99.0 |
| LFC2-4040 | 85 (7.9) | 2,500 (9.5) | 95.0 |
- LFC flow and operating pressure are comparable to CPA2 elements (10,000 to 11,000 GPD / 37.8 – 41.6 m³/d).
- LFC1 minimum rejection is 99.0%, comparable to ESPA1 elements.
LFC1 Specific Features
- Surface Charge: Neutrally charged, designed to minimize the adsorption of organic foulants and maintain its neutral charge over a wide pH range (acidic to basic).
- Fouling Resistance: Minimizes flux degradation due to organic foulant buildup. Retains a significant percentage of flux regardless of cationic, anionic, amphoteric, or neutral surfactant types. Demonstrates stable flux in high fouling environments, such as treated secondary effluent, over extended operating times.
- Applications: Includes treatment of municipal wastewater, boiler blow-down, and high fouling surface waters. It can be used as an alternative to Cellulose Acetate (CAB) membranes, offering lower feed pressure, higher flow, and higher rejection, without the pH 4-6 operational limitation of CAB membranes.
LFC2 Specific Features
- Surface Charge: Cationically (positively) charged polyamide.
- Fouling Resistance:
- Enables flux restoration after cleaning when exposed to cationic surfactants or polymers.
- Experiences less severe flux loss due to cationic polymer fouling compared to anionic membranes.
- Rejection Performance:
- Provides more effective rejection of sodium (Na⁺) and other positive ions at low Total Dissolved Solids (TDS) compared to conventional anionically charged membranes.
- Offers better overall rejection than conventional polyamides at low TDS values and when operating in the second pass of a two-pass RO system.
- Caution: The use of anionic polymers with LFC2 is not recommended as they may irreversibly foul the membrane surface.
Operating Limits / Cautions
- As a composite polyamide membrane, systems using LFC cannot utilize free chlorine.
- Chloramines may be used for biological control under specific conditions; consult Hydranautics for guidance.
Disclaimer: This summary is based on the provided text extract. It may not include all figures, footnotes, or the latest revisions found in the complete OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.
Official datasheet (PDF)
Curated from selected public technical reference material for discovery and preliminary comparison. This summary is not a substitute for a current certified manufacturer datasheet. Verify revisions and design limits before use.