Hy-Pro
Hy-Pro HP21L4-1MB
- Micron
- 1µm nominal (β-rated, absolute 3µm)
- Media
- Dualglass
- O.D.
- 1.735"
- I.D.
- 1.025"
- Length
- 4.45"
- Seal
- Nitrile (Buna-N)
- Efficiency
- β4000
- Collapse
- 3000 PSID
Hy-Pro HP21L4-1MB is a filter element rated at 3 µm (1 µm nominal), a beta ratio of β ≥ 4000, 3000 psid collapse pressure, and measuring 1.735 in OD, 1.025 in ID, and 4.45 in length. It uses Dualglass media and Nitrile (Buna-N) seals, rated for -45 °F to 225 °F (Donaldson Hy-Pro HP101 Data Sheet FE-101-071724, p.4).
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3 verified cross-references — see what replaces this →- Part Number
- HP21L4-1MB
- Manufacturer
- Hy-Pro
Hy-Pro HP21L4-1MB specifications
The Hy-Pro HP21L4-1MB is a 1µm nominal (β-rated, absolute 3µm) dualglass filter element. It measures 1.735" OD x 1.025" ID x 4.45" long. Filtration efficiency is rated at β4000 per ISO 16889. Seals are Nitrile (Buna-N), rated for -45°F to 225°F. Collapse pressure rating is 3000 PSID. 3 verified cross-references are available from aftermarket manufacturers. Specifications verified. Last reviewed: April 2026
Performance
- Series
- High Pressure In-Line Filter Element (High Collapse)
- Media Type
- DualglassG8 High-performance glass fiber media
- Micron Rating
- 1µm nominal (β-rated, absolute 3µm)
- Max Operating Pressure
- 4000 psi (275 bar)
- Collapse Rating
- 3000 PSID
- Efficiency (ISO 16889)
- β4000
- Efficiency
- 99.97%
- Operating Temperature
- -45°F to 225°F
Dimensions
- Seal Material
- Nitrile (Buna-N)
- O.D. (inches)
- 1.735"
- O.A.L. (inches)
- 4.45"
- I.D. (inches)
- 1.025"
Additional
- Filter Type
- Cartridge Element
- Element Length
- 4" (102 mm)
- Beta Ratio
- β3[C] ≥ 4000
- Max Temperature
- 225°F (107°C)
What replaces the Hy-Pro HP21L4-1MB?
3 verified cross-references on file. A cross-reference confirms dimensional fit and micron rating — not performance equivalence. Beta ratio, collapse rating, media, and service life can differ between brands.
| Part Number | Manufacturer | Match |
|---|---|---|
| SF9021-4-1UM | Swift Filters | Sourced |
| M69204MAABH | Filtersoft | Verified |
| H9204MAABH | Filtersoft | Verified |
Application & Compatibility
The HY-PRO HP21L4-1MB is designed for use in hydraulic and lubrication filtration systems. With a 1µm nominal (β-rated, absolute 3µm) rating, this element is suitable for proportional valve protection and general hydraulic systems. Nitrile (Buna-N) seals provide compatibility with standard petroleum-based fluids and mineral oils.
The 3000 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.
Frequently Asked Questions
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What is the collapse pressure rating of the Hy-Pro HP21L4-1MB?
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