# AQUA-TEC (AT)

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

Category: Cartridge Filters
Series: AT
Model format: `AT-[MICRON]-[LENGTH]-[END CAP]-[SEAL]-[OPTIONS]`
Example: `AT-0.45-20-E4-VI`

## Overview
Pleated PES membrane cartridge for high-clarity liquid filtration where reproducibility and cleanliness are critical.

## How It Works
Liquid passes through a pleated asymmetric membrane that sieves particles by size exclusion; captured contaminants remain in the pleat pack

## Applications
- RO post-filter or final barrier for bioburden/particulates
- Beverage polishing for yeast/haze reduction before packaging
- Electronics DI/UPW final filtration at points of use
- Pharmaceutical/biotech buffer and WFI distribution bioburden control
- Chemical process water polishing for catalyst/quality protection
- Desalination RO pretreatment polishing to reduce SDI/fines
- HVAC condensate/boiler make-up final particulate control
- Paints/coatings solvent/waterborne fine particulate removal
- Marine potable/process water final filtration
- Food and dairy ingredient water clarification

## Physical Specifications
- **flow direction:** Outside-to-inside
- **backwash-able:** No
- **outside diameter options:** 2.7"
- **inner diameter options:** 1.1"
- **nominal length options:** 9.75", 10", 20", 30", 40"
- **end cap options:** DOE W/ Gaskets, 222/Flat Single Open End, 222/Fin Single Open End, 226/Flat Single Open End, 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:** Polyethersulfone
- **micron ratings:** 0.05, 0.1, 0.2, 0.45, 0.65
- **media rating:** Absolute
- **changeout dp:** 35 PSID
- **burst pressure:** 60 PSID
- **max temperature:** 180°F
- **approvals certifications:** USP Class VI, FDA Listed

## Housing Compatibility
- Standard cartridge filter housings

## Ordering
- Model format: `AT-[MICRON]-[LENGTH]-[END CAP]-[SEAL]-[OPTIONS]`
- Example: `AT-0.45-20-E4-VI`

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

### 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

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

### Option codes
- **R:** Factory pre-rinse

### Size codes
- **9.75:** OD 2.7", ID 1.1", length 9.75"
- **10:** OD 2.7", ID 1.1", length 10"
- **20:** OD 2.7", ID 1.1", length 20"
- **30:** OD 2.7", ID 1.1", length 30"
- **40:** OD 2.7", ID 1.1", length 40"

### Micron ratings
- 0.05, 0.1, 0.2, 0.45, 0.65

## 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/at
- Markdown: https://www.fil-trek.com/products/cartridge-filters/at.md