Pall HC7500SDP4H Replacement Filter Element — Cross-Reference & Specifications
Hydrafil Part Number: BF-PAL-279910-L4-3MB | Ships same day from Detroit, MI | OEM-equivalent performance
When a hydraulic circuit demands sub-5-micron protection in a compact form factor, the 3µm Buna-N short-body configuration is the go-to choice for engineers running precision servo valve systems and proportional control circuits on standard mineral oil. The Hydrafil BF-PAL-279910-L4-3MB delivers the same ultra-fine 3µm filtration as the OEM HC7500SDP4H in the 6.9 in L4 housing, with Buna-N (Nitrile) seals rated for the full operating range of conventional hydraulic fluids. This compact element fits space-constrained manifold filter assemblies where the larger L8 body simply won’t clear adjacent plumbing.
Dimensional Specifications
A precise dimensional match ensures sealing integrity and correct bypass valve engagement — using an off-spec element risks bypass at startup and contamination ingestion.
| Specification | Value |
|---|---|
| Outer Diameter (Top) | 5.06 in |
| Outer Diameter (Bottom) | 5.06 in |
| Element Length | 6.9 in |
| Thread Size | 1.5 - 16 |
| Collapse Rating | 100 psid |
Media & Construction
Every construction material is selected for long-cycle reliability in continuous-duty hydraulic service.
- Filtration Media: Microglass Fiber Media — borosilicate microglass delivers significantly higher dirt-holding capacity and more consistent pore structure than cellulose, making it the correct choice for tight 3µm servo valve protection where depth loading and gradient density matter
- Seal Material: Buna-N (Nitrile) — compatible with petroleum-based and water-glycol hydraulic fluids across the standard operating range up to approximately 200 °F; the correct seal for most industrial mineral oil circuits
- End Caps: Corrosion Resistant Steel — corrosion resistant for long service life
- Center Tube: Corrosion Resistant Steel — maintains structural integrity under pressure cycling
Filtration Performance Rating
At 3µm, this element targets particles in the range most destructive to servo valves and proportional valves — particles between 2 and 10 microns cause the majority of spool and land wear in precision hydraulic control components. The Beta ratio of Bx = 200 and Bx[c] = 1000 means that for every 1,000 particles of 3µm or larger entering the element, only 1 passes downstream, delivering ISO cleanliness codes consistent with NAS 6–7 class requirements for servo systems.
3µm Buna-N in a compact L4 housing is the standard choice for servo valve protection and proportional control circuits running on mineral oil in space-constrained filter assemblies — fine enough to protect precision components without requiring a long-body housing.
ISO Standards Compliance
This element is manufactured to comply with the following ISO performance test standards:
| ISO Standard | What It Tests |
|---|---|
| ISO 2941 | Collapse & burst resistance |
| ISO 2942 | Fabrication integrity & bypass valve function |
| ISO 2943 | Material compatibility with hydraulic fluids |
| ISO 3724 | Flow fatigue characteristics |
| ISO 3968 | Pressure drop vs. flow rate characteristics |
| ISO 16889 | Multi-pass performance (Beta ratio methodology) |
About the Pall HC7500SDP4H
The HC7500SDP4H is the 3µm Buna-N short-body variant in Pall’s HC7500 filter series, engineered for hydraulic systems requiring sub-5-micron cleanliness control — primarily servo valve circuits, proportional valve manifolds, and precision motion control systems in machine tool, injection molding, and aerospace ground support applications. The L4 compact body fits the same filter head as the entire HC7500 family while delivering finer filtration than the more common 6µm SDN and 25µm SDT variants. This configuration is specified when the application requires servo-level cleanliness but the available installation envelope is limited.
Why Order from Hydrafil?
- OEM-equivalent performance at a lower cost per element
- Manufactured and sourced in the USA — Detroit, Michigan facility
- Same-day shipping on in-stock elements
- 200,000+ filter cross-references available
- Technical support: +1 (313) 915-4120
Questions? Call (313) 915-4120 or email sales@hydrafil.com
Pall and HC7500SDP4H are trademarks of their respective owners, referenced here solely for cross-reference and compatibility identification purposes.