# HCG Series (HCG)

> Fil-Trek Oil & Fuel Filters. Canonical page: https://www.fil-trek.com/products/oil-fuel-filters/hcg

Category: Oil & Fuel Filters
Series: HCG
Model format: `HCG-[SIZE CODE]-[MICRON]-[OPTIONS]`
Example: `HCG-636-1-VI`

## Overview
High-efficiency pleated microglass cartridges designed for critical filtration of oils and chemicals

## How It Works
Fluid flows outside-to-in through pleated microglass media, trapping fine particulates within the dense fiber matrix at 98% efficiency

## Applications
- Hydraulic and lube oil systems
- Jet fuel and diesel filtration
- Glycol and amine processing
- Process water polishing

## Physical Specifications
- **flow direction:** Outside-to-inside
- **backwash-able:** No
- **outside diameter options:** 2.5", 4.5", 6.0"
- **inner diameter options:** 1.0", 1.625", 3.5", 2.625"
- **nominal length options:** 8", 9", 9.875", 11", 14.5", 17.875", 18", 29", 29.25", 29.625", 30", 36", 39", 40", 44"
- **caps materials:** Plated Steel
- **cores materials:** Plated Steel
- **size options:** 310, 320, 329, 330, 339, 340, 509, 511, 518, 536, 608, 614, 618, 629, 630, 636, 644, 718, 729, 730, 736

## Media Specifications
- **media primary options:** Microglass
- **micron ratings:** 0.5, 1, 2, 3, 5, 10, 20, 25, 40, 50, 75
- **efficiency percent:** 98%
- **media rating:** Nominal
- **changeout dp:** 20 PSID
- **burst pressure:** 75 PSID
- **max temperature:** 240°F, 300°F (HT - High Temperature)
- **approvals certifications:** None

## Housing Compatibility
- Fil-Trek VF Series

## Ordering
- Model format: `HCG-[SIZE CODE]-[MICRON]-[OPTIONS]`
- Examples:
  - `HCG-636-1-VI`
  - `HCG-618-5`

### Option codes
- **VI:** Viton gasket
- **DZ:** Custom ID
- **A:** No outside cover
- **H:** Handle

### Size codes
- **310:** OD 2.5", ID 1", length 9.875"
- **320:** OD 2.5", ID 1", length 19.75"
- **329:** OD 2.5", ID 1", length 29.25"
- **330:** OD 2.5", ID 1", length 29.625"
- **339:** OD 2.5", ID 1", length 39"
- **340:** OD 2.5", ID 1", length 40"
- **509:** OD 4.5", ID 1.625", length 9"
- **511:** OD 4.5", ID 1.625", length 11"
- **518:** OD 4.5", ID 1.625", length 17.875"
- **536:** OD 4.5", ID 1.625", length 36"
- **608:** OD 6", ID 3.5", length 8"
- **614:** OD 6", ID 3.5", length 14.5"
- **618:** OD 6", ID 3.5", length 18"
- **629:** OD 6", ID 3.5", length 29"
- **630:** OD 6", ID 3.5", length 30"
- **636:** OD 6", ID 3.5", length 36"
- **644:** OD 6", ID 3.5", length 44"
- **718:** OD 6", ID 2.625", length 18"
- **729:** OD 6", ID 2.625", length 29"
- **730:** OD 6", ID 2.625", length 30"
- **736:** OD 6", ID 2.625", length 36"

### Micron ratings
- 0.5, 1, 2, 3, 5, 10, 20, 25, 40, 50, 75

## 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/oil-fuel-filters/hcg
- Markdown: https://www.fil-trek.com/products/oil-fuel-filters/hcg.md