# HelixDepth (HDG)

> Fil-Trek Gas Filters. Canonical page: https://www.fil-trek.com/products/gas-filters/hdg

Category: Gas Filters
Series: HDG
Model format: `HDG-[SIZE CODE]-[MEDIA]-[MICRON]-[SEAL]-[CORE]-[CAPS]-[OPTIONS]`
Example: `HDG-336-PO-0.1-N-N-N`

## Overview
HelixDepth HDG elements are depth-style cartridges engineered with a gradient-density matrix that captures more particulates, delivers higher dirt-holding capacity, extends service life, and provides the lowest cost of ownership—protecting downstream equipment.

## How It Works
Gas flows outside‑to‑inside through a multi‑layer depth matrix. Larger particles are captured on outer layers while fine solids are retained deeper in the structure, maintaining low pressure drop and high solids holding capacity.

## Applications
- Dry gas transmission, processing and storage
- Compressor suction/discharge
- Gas gathering
- Metering / custody transfer
- Glycol and amine contactor protection
- Fuel gas
- Utility & instrument air
- Removal of fine, deformable, and shear‑sensitive solids such as sand, iron sulfide, iron oxide, pipe scale, dust, salts, asphaltenes, coal fines, paraffins

## Physical Specifications
- **flow direction:** Outside-to-inside
- **outside diameter options:** 3.0", 4.5", 5.5"
- **inner diameter options:** 2.1", 3.1", 4.25"
- **nominal length options:** 12", 24", 36", 43", 72"
- **end cap options:** Open no gasket, Open metal cap flat gasket
- **top cap options:** Open no gasket, Open metal cap flat gasket, Metal cap with 16mm hole
- **inner core materials:** None, Metal Core, Stainless Core
- **outer core materials:** None, Metal Core, Stainless Core
- **outer wrap materials:** Special Order
- **size options:** 24, 36, 72, 312, 318, 324, 336, 372, 536, 572
- **gasket material options:** None, Buna-N, EPDM, Viton
- **special notes:** 5.5" OD requires metal core

## Media Specifications
- **media primary options:** Polyester, Polypropylene
- **micron ratings:** 0.1, 0.3, 0.5, 1, 5, 10
- **efficiency percent:** 99.98
- **media rating:** Absolute
- **beta ratio:** 5000
- **changeout dp:** 15 PSID
- **burst pressure:** 25 PSID
- **max temperature:** Based on material
- **approvals certifications:** None

## Housing Compatibility
- Fil-Trek 70V Series
- Parker Series 75/85

## Competitor Cross-Reference
- Parker Peco PCHG DYNASEP
- Jonell JFS
- Shawndra Sparksfilters SPI-5000
- Shawndra SPI

## Ordering
- Model format: `HDG-[SIZE CODE]-[MEDIA]-[MICRON]-[SEAL]-[CORE]-[CAPS]-[OPTIONS]`
- Examples:
  - `HDG-336-PO-0.1-N-N-N`
  - `HDG-336-PE-0.3-IC-V-CE`
  - `HDG-336-PE-0.3-C-V-CE-SS`

### Media codes
- **PE:** Polyester
- **PO:** Polypropylene

### Seal codes
- **N:** Integral Seal
- **B:** Metal Caps W/Buna-N
- **E:** Metal Caps W/EPDM
- **V:** Metal Caps W/Viton

### Core codes
- **N:** No Core
- **C:** Metal Cores
- **IC:** Metal Core, ID Only
- **OC:** Metal Core, OD Only

### Cap codes
- **N:** DOE Integral Caps
- **C:** DOE Metal Caps
- **CE:** Metal Cap W/16mm Hole

### Option codes
- **SS:** Stainless Construction

### Size codes
- **312:** OD 4.5", ID 3.1", length 12"
- **318:** OD 4.5", ID 3.1", length 18"
- **324:** OD 4.5", ID 3.1", length 24"
- **336:** OD 4.5", ID 3.1", length 36"
- **372:** OD 4.5", ID 3.1", length 72"
- **536:** OD 5.5", ID 4.2", length 36"
- **572:** OD 5.5", ID 4.2", length 72"

### Micron ratings
- 0.1, 0.3, 0.5, 1, 5, 10

## 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/gas-filters/hdg
- Markdown: https://www.fil-trek.com/products/gas-filters/hdg.md