# STRATIS GOLD (STG)

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

Category: Cartridge Filters
Series: STG
Model format: `STG-[MICRON]-[LENGTH]-[END CAP]-[SEAL]`
Example: `STG-1-30-E2-BN`

## Overview
Absolute-rated, meltblown polypropylene cartridge engineered for high-efficiency particulate removal in industrial and sanitary applications

## How It Works
Fluid flows outside-in through multi-zone depth media; coarse layers load larger particles while tighter inner layers provide Beta 1000 retention at the rated micron

## Applications
- RO/UF pretreatment, desal intake, and plant/utility water polishing (SDI/fines reduction)
- Boiler feed/condensate and cooling-tower sidestream particulate control
- Chemical, coatings/inks, and equipment protection prefiltration (PP-compatible)
- Coolant/cutting-fluid and glycol loop fines control
- Electronics DI/RO rinse and food & beverage clarification
- Marine/utility water and general process guards
- Compressed air/gas particulate prefilters (non-oil aerosols)
- Data centers: TCS CDU filtration, FWS cooling tower, chilled water filtration

## Physical Specifications
- **flow direction:** Outside-to-inside
- **backwash-able:** No
- **outside diameter options:** 2.5"
- **inner diameter options:** 1.0"
- **nominal length options:** 10", 20", 30", 40"
- **end cap options:** DOE W/ Cut Ends, DOE W/ Gaskets, DOE W/ Extended Core, 222/Flat Single Open End, 222/Fin Single Open End, 226/Flat Single Open End, 226/Fin Single Open End, 222 W/ Plastic Spring, Self Seal Spring (one end only), Direct Bond Gasket
- **caps materials:** Polypropylene
- **cores materials:** Polypropylene
- **gasket material options:** Buna-N, EPDM, Silicone, Viton, Teflon encap. Viton

## Media Specifications
- **media primary options:** Polypropylene
- **micron ratings:** 0.3, 0.5, 1, 3, 5, 10, 20, 30, 50, 70
- **efficiency percent:** 99.9%
- **media rating:** Absolute
- **beta ratio:** 1000
- **changeout dp:** 35 PSID
- **burst pressure:** 150 PSID
- **max temperature:** 180°F
- **approvals certifications:** USP Class VI, FDA Listed, NSF 61

## Housing Compatibility
- Standard cartridge filter housings

## Ordering
- Model format: `STG-[MICRON]-[LENGTH]-[END CAP]-[SEAL]`
- Example: `STG-1-30-E2-BN`

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

### Seal codes
- **Blank:** None (E1 only)
- **BN:** Buna-N
- **EP:** EPDM
- **SI:** Silicone
- **VI:** Viton
- **TEV:** Teflon encap. Viton

### Cap codes
- **E1:** DOE W/ Cut Ends
- **E2:** DOE W/ Gaskets
- **E3:** DOE W/ Extended Core
- **E4:** 222/Flat Single Open End
- **E5:** 222/Fin Single Open End
- **E6:** 226/Flat Single Open End
- **E7:** 226/Fin Single Open End
- **E8:** 222 W/ Plastic Spring
- **E9:** Self Seal Spring (one end only)
- **E16:** Direct Bond Gasket

### Size codes
- **10:** OD 2.5", ID 1", length 10"
- **20:** OD 2.5", ID 1", length 20"
- **30:** OD 2.5", ID 1", length 30"
- **40:** OD 2.5", ID 1", length 40"

### Micron ratings
- 0.3, 0.5, 1, 3, 5, 10, 20, 30, 50, 70

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