# Teflon Membrane (TEF-PURE)

> Fil-Trek Cartridge Filters. Canonical page: https://www.fil-trek.com/products/cartridge-filters/tef-pure

Category: Cartridge Filters
Series: TEF-PURE
Model format: `TP-[MICRON]-[LENGTH]-[END CAP]-[SEAL]`
Example: `TP-0.05-40-E2-BN`

## Overview
High-purity membrane cartridge engineered for critical particulate control in aggressive liquids, solvents, and air/gas applications

## How It Works
 Fluid or gas passes outside-in through a microporous PTFE matrix that removes contaminants by precise size exclusion while allowing clean effluent to exit the core at stable differential pressure

## Applications
- Final filtration of high-purity water and electronics DI/UPW (0.05–1.0 µm)
- Aggressive chemical and solvent polishing (PTFE media; verify compatibility)
- Pharma/biotech buffers and air/gas vent/bubble-point tested applications (steamable/autoclavable)
- Point-of-use sterile barrier candidates at 0.2 µm with integrity testing (process-dependent)

## Physical Specifications
- **flow direction:** Outside-to-inside
- **backwash-able:** No
- **outside diameter options:** 2.7"
- **inner diameter options:** 1.0"
- **nominal length options:** 10", 20", 30", 40"
- **end cap options:** DOE W/ Gaskets, SOE W/ 222, 222/Fin Single Open End, SOE W/ 226, 226/Fin Single Open End, SOE W/ Internal O-ring
- **caps materials:** Polypropylene
- **cores materials:** Polypropylene
- **gasket material options:** Buna-N, EPDM, Silicone, Viton, Teflon encap. Viton

## Media Specifications
- **media primary options:** PTFE Membrane
- **micron ratings:** 0.05, 0.1, 0.2, 0.45, 1
- **media rating:** Absolute
- **burst pressure:** 75 PSID
- **max temperature:** 203°F
- **approvals certifications:** USP Class VI

## Housing Compatibility
- Standard cartridge filter housings

## Ordering
- Model format: `TP-[MICRON]-[LENGTH]-[END CAP]-[SEAL]`
- Example: `TP-0.05-40-E2-BN`

### Length codes
- **STD:** See Table

### Seal codes
- **BN:** Buna-N
- **EP:** EPDM
- **SI:** Silicone
- **VI:** Viton
- **TEV:** Teflon encap. Viton

### Cap codes
- **E2:** DOE W/ Gaskets
- **E4:** 222/Flat Single Open End
- **E5:** 222/Fin Single Open End
- **E6:** 226/Flat Single Open End
- **E7:** 226/Fin Single Open End
- **E14:** SOE W/ Internal O-ring

### Size codes
- **10:** OD 2.7", ID 1", length 10"
- **20:** OD 2.7", ID 1", length 20"
- **30:** OD 2.7", ID 1", length 30"
- **40:** OD 2.7", ID 1", length 40"

### Micron ratings
- 0.05, 0.1, 0.2, 0.45, 1

## Contact
- **sales@fil-trek.com** — all filtration product inquiries, projects, filter housings, and filtration systems
- **filters@fil-trek.com** — replacement filter media, filter elements, filter bags, hardware, and spare parts

## Links
- HTML: https://www.fil-trek.com/products/cartridge-filters/tef-pure
- Markdown: https://www.fil-trek.com/products/cartridge-filters/tef-pure.md