Hydac
The Hydac 303999 is a 5µm sintered fiber hydraulic filter element. It measures 1.85" OD x 0.87" ID x 6.02" long. Seals are VITON, rated for -13°F to 250°F. Collapse pressure rating is 3045 PSID. 1 verified cross-reference is available from aftermarket manufacturers.
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Technical specifications for the Hydac 303999 filter element. Data sourced from manufacturer catalogs and verified against OEM documentation.
| Specification | Value |
|---|---|
| Micron Rating | 5µm |
| Media Type | SINTERED FIBER |
| O.D. (inches) | 1.85" |
| O.A.L. (inches) | 6.02" |
| Collapse Rating | 3045 PSID |
| I.D. (inches) | 0.87" |
| Seal Material | VITON |
| Flow Direction | OUTSIDE-IN |
| Operating Temperature | -13°F to 250°F |
Last verified: February 2026
1 verified cross-reference available from Hy-Pro. All cross-references are reviewed for dimensional and performance compatibility.
| Manufacturer | Part Number | Confidence |
|---|---|---|
| Hy-Pro | Request part number | Verified |
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Last verified: February 2026
The HYDAC 303999 is designed for use in hydraulic and lubrication filtration systems. With a 5µm rating, this element is suitable for servo valve protection and high-precision hydraulic systems. VITON seals provide compatibility with petroleum-based fluids, synthetic fluids, phosphate esters, and water-glycol mixtures.
The 3045 PSID collapse rating indicates the maximum differential pressure this element can withstand during cold starts or bypass conditions without structural failure. Ensure your system's maximum differential pressure does not exceed this rating.
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