The Ultimate Polisher: PTFE Membrane Coalescers for Ultra-High Purity Applications

The Ultimate Polisher: PTFE Membrane Coalescers for Ultra-High Purity Applications

At the pinnacle of coalescing technology sits the PTFE Membrane Coalescer. Designed for applications where the highest levels of fluid purity, chemical resistance, and reliability are demanded, it represents a premium solution for solving the most challenging separation problems.

What Makes PTFE Membrane Unique?
Polytetrafluoroethylene (PTFE) is a fluoropolymer with exceptional properties. When engineered into a microporous membrane, it creates a coalescing medium with distinct advantages:

1. Absolute Filtration & Ultra-High Efficiency: Unlike depth media which operates on a probability basis, the membrane acts as a fixed-pore barrier. It delivers >99.99+% efficiency on droplets and particles larger than its pore size (e.g., 0.1, 0.2, 0.5 micron), guaranteeing a consistent, predictable outlet quality.

2. Broad Chemical Compatibility: PTFE is virtually inert. It resists attack from nearly all aggressive chemicals, strong acids, bases, and solvents, making it the safest choice for challenging process streams.

3. Hydrophobic & Oleophobic Nature: The membrane is naturally water-repellent and oil-repellent. However, through advanced treatment, Lefilter can create lastingly oleophilic PTFE membranes that attract and coalesce oils while shedding water, perfect for dehydrating harsh chemical streams.

4. High Temperature Stability: It operates continuously at temperatures up to 130°C (260°F) and can withstand even higher peaks.

Applications Where PTFE is the Only Choice:

• Semiconductor Manufacturing: Purifying ultra-high-purity (UHP) process gases and CDA (Clean Dry Air) to prevent wafer defects.

• Pharmaceutical & Bio-Processing: Sterilizing-grade filtration of process air and gases in fermenters and filling lines.

• High-Purity Chemical Additive Streams: Filtering catalysts or inhibitors in polymerization and specialty chemical processes.

• Aviation Fuel (Avjet) Final Polishing: As the last barrier before aircraft fueling to meet DEF STAN 91-091/ISO 12500 standards.

• Corrosive Gas Streams: Treating chlorine, hydrogen chloride, or other aggressive process gases.