Kaydon
Kaydon KF4509-3
Industrial filter element
Kaydon KF4509-3 specifications
The Kaydon KF4509-3 is a 4µm dualglass filter element. It measures 4.39" OD x 3.3" ID x 8.96" long. Filtration efficiency is rated at β1000 per ISO 16889. Seals are Nitrile (Buna-N). 1 verified cross-reference is available from aftermarket manufacturers. Specifications verified. Last reviewed: March 2026
Physical fit
- Outer Diameter (O.D.)
- 4.39"Verified via cross-reference
- Inner Diameter (I.D.)
- 3.3"Verified via cross-reference
- Overall Length
- 8.96"Verified via cross-reference
- Micron Rating
- 4µmVerified via cross-reference
- Seal Material
- Nitrile (Buna-N)Verified via cross-reference
- Connection / Thread
- Not yet verified from an OEM source
Performance: Kaydon published values
These are Kaydon's own published numbers. Performance specs differ by brand and are never inherited across cross-references.
- Efficiency (ISO 16889)
- β1000
- Media Type
- Dualglass
What replaces the Kaydon KF4509-3?
1 published cross-reference on file. Select to expand.
What replaces the Kaydon KF4509-3?
1 published cross-reference on file. Select to expand.
A cross-reference confirms dimensional fit and micron rating, not performance equivalence. Beta ratio, collapse rating, media, and service life can differ between brands.
Published cross-references
| Part Number | Manufacturer | Match |
|---|---|---|
| HP4509L9-3MB | Hy-Pro | Verified |
Application & Compatibility
The KAYDON KF4509-3 is designed for use in hydraulic and lubrication filtration systems. With a 4µm rating, this element is suitable for servo valve protection and high-precision hydraulic systems. Nitrile (Buna-N) seals provide compatibility with standard petroleum-based fluids and mineral oils.
Frequently Asked Questions
What micron rating is the Kaydon KF4509-3?
What are the dimensions of the Kaydon KF4509-3?
What seal material does the Kaydon KF4509-3 use?
Is there a cross-reference for the Kaydon KF4509-3?
How this entry is verified
Every specification on this page names its source: manufacturer documents first, distributor catalogs second, decoded part-number patterns labeled as such. When a value has not been verified from an OEM source, the cell says so. Cross-references are fit claims, never performance claims.
Request a quote for the Kaydon KF4509-3
Tell us where to send it and we'll get you pricing and availability within 24 hours. Leave a number and we'll call you back within the hour.
Verified Cross-References
520,000+ verified cross-references on file
Fast Response
Quotes and answers within 24 hours
Expert Support
Real filtration specialists, not call centers