Datasheet summary
GD / GDA Cartridges
Engineering summary from PDF text extraction for GD / GDA Cartridges. Verify every value with the OEM datasheet.
Summary
Product identification
- GD and GDA Series Gradient Density Cartridges
- Manufactured in the USA from 100% pure polypropylene.
- Sized for PENTEK® 10" and 20" Big Blue housings.
- Designed not to impact taste, odor, or color.
- Features superior chemical resistance and are not prone to bacterial attack.
- Utilizes two unique gradient layers, providing up to three times the dirt-holding capacity of pleated, string-wound, and standard spun polypropylene cartridges.
- Effective filter depth is increased over 200% compared to string-wound and standard spun-polypropylene cartridges.
- GDA Series cartridges include a polypropylene inner support core for added strength and unimpeded flow.
Operating limits
- Temperature Rating: 40 - 145ºF (4.4 - 62.8ºC)
Materials of construction
- Filter Media: Polypropylene
- Inner Support Core (GDA Series): Polypropylene
Mechanical / hydraulic
The following table details the maximum dimensions, micron ratings, and initial pressure drop at 10 gpm (38 Lpm) for various models:
| Model | Maximum Dimensions | Micron Rating* | Micron Size (Outer - Core) | Initial ΔP (psi) @ 10 gpm | Initial ΔP (bar) @ 38 Lpm |
|---|---|---|---|---|---|
| GD-7520-BB | 4-1/2" x 9-7⁄8" (114 mm x 251 mm) | Nominal | 75 - 20 | <1.5 | <0.1 |
| GD-5010-BB | 4-1/2" x 9-7⁄8" (114 mm x 251 mm) | Nominal | 50 - 10 | <2 | <0.1 |
| GD-2501-BB | 4-1/2" x 9-7⁄8" (114 mm x 251 mm) | Nominal | 25 - 1 | <3.2 | <0.2 |
| GD-7520-20BB | 4-1/2" x 20" (114 mm x 508 mm) | Nominal | 75 - 20 | <3 | <0.2 |
| GD-5010-20BB | 4-1/2" x 20" (114 mm x 508 mm) | Nominal | 50 - 10 | <4 | <0.3 |
| GD-2501-20BB | 4-1/2" x 20" (114 mm x 508 mm) | Nominal | 25 - 1 | <6.4 | <6.4 |
| GDA-7505-BB | 4-1/2" x 9-7⁄8" (114 mm x 251 mm) | Absolute | 75 - 5 | <5.2 | <0.4 |
| GDA-5001-BB | 4-1/2" x 9-7⁄8" (114 mm x 251 mm) | Absolute | 50 - 1 | <9 | <0.6 |
| GDA-250.5-BB | 4-1/2" x 9-7⁄8" (114 mm x 251 mm) | Absolute | 25 - 0.5 | <10.5 | <0.7 |
| GDA-7505-20BB | 4-1/2" x 20" (114 mm x 508 mm) | Absolute | 75 - 5 | <10.4 | <0.7 |
| GDA-5001-20BB | 4-1/2" x 20" (114 mm x 508 mm) | Absolute | 50 - 1 | <18 | <1.2 |
| GDA-250.5-20BB | 4-1/2" x 20" (114 mm x 508 mm) | Absolute | 25 - 0.5 | <21 | <1.4 |
*Based on manufacturer’s internal testing.
Performance – Flow Rate Characteristics: See the official PDF for exact tabulated values and a graphical representation of pressure drop versus flow rate for all models.
Certifications
- Tested and Certified by NSF International to NSF/ANSI Standard 42 for material requirements only.
Warnings
- Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system.
Typical applications
- Residential
- Rural
- Municipal
- Industrial
- Commercial
- Well Water
- Hotel/Motel
- Restaurants
- City Water
- Laboratories
- Schools
- Homes
- Laundromats
- Factories
- Cafeterias
Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions. Contractual data must match the OEM PDF revision used on the project.
Official datasheet (PDF)
Curated from selected public technical reference material for discovery and preliminary comparison. This summary is not a substitute for a current certified manufacturer datasheet. Verify revisions and design limits before use.