Baldwin
Baldwin B309
The Baldwin B309 is a 10µm microglass (borosilicate) engine & mobile filter element. It measures 3.66" OD x 2.44" ID x 7.87" long. Filtration efficiency is rated at β1000 per ISO 16889. Seals are Nitrile (Buna-N). 1 verified cross-reference is available from aftermarket manufacturers.
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What are the specifications of the Baldwin B309?
Technical specifications for the Baldwin B309 filter element. Data sourced from manufacturer catalogs and verified against OEM documentation.
| Specification | Value |
|---|---|
| Performance | |
| Micron Rating | 10µm |
| Media Type | Microglass (Borosilicate) |
| Efficiency (ISO 16889) | β1000 |
| Dimensions | |
| O.D. (inches) | 3.66" |
| O.A.L. (inches) | 7.87" |
| I.D. (inches) | 2.44" |
| Seal Material | Nitrile (Buna-N) |
Last verified: February 2026
What replaces the Baldwin B309?
1 verified replacement available from Swift Filters
All cross-references are reviewed for dimensional and performance compatibility. Enter your info below to receive the full cross-reference report.
Application & Compatibility
The BALDWIN B309 is designed for use in industrial filtration applications. Rated at 10µm. Nitrile (Buna-N) seals provide compatibility with standard petroleum-based fluids and mineral oils.
Frequently Asked Questions
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