Pall HC7500SDZ8H Replacement Filter Element — Cross-Reference & Specifications
Hydrafil Part Number: BF-PAL-276738-L8-1MB | Ships same day from Detroit, MI | OEM-equivalent performance
The Pall HC7500SDZ8H is the long-body (L8) ultra-fine 1-micron, Buna-N element — a specialized configuration for precision hydraulic systems with flow rates too high for the compact SDZ4H to maintain acceptable differential pressure at 1µm. Because 1µm media creates significantly higher flow resistance than coarser ratings, the 10.9 in long-body design provides the additional media surface area required to sustain servo-grade cleanliness across high-volume flow without driving differential pressure to bypass-inducing levels. This configuration is most often found in central hydraulic filtration stations serving multi-axis servo systems, large-format precision machining centers, and high-flow test stand supply circuits where the entire hydraulic loop must be maintained at ISO 4406 cleanliness of 14/12/9 or cleaner across demanding cycle volumes.
Dimensional Specifications
The SDZ8H fits the long-body (L8) HC7500 housing only — do not substitute the compact SDZ4H in an L8 housing for a 1µm application; the reduced media area of the short-body element will cause premature bypass at system flow rates the long-body is designed to handle.
| Specification | Value |
|---|---|
| Outer Diameter (Top) | 5.06 in |
| Outer Diameter (Bottom) | 5.06 in |
| Element Length | 10.9 in |
| Thread Size | 1.5 - 16 |
| Collapse Rating | 100 psid |
Media & Construction
The BF-PAL-276738-L8-1MB uses the extended long-body format with ultra-fine microglass fiber media — the combination required when high flow rates and 1µm filtration performance must coexist in the same housing.
- Filtration Media: Microglass Fiber Media — ultra-fine glass fiber construction rated to 1µm Beta performance per ISO 16889; the long-body media pack provides the surface area needed to achieve servo-grade particle capture at high system flow without excessive differential pressure
- Seal Material: Buna-N (Nitrile) — the standard elastomer for mineral oil, water glycol, and emulsion-type hydraulic fluids up to 225°F; the correct economical choice for high-flow servo systems running conventional hydraulic oil
- End Caps: Corrosion Resistant Steel — maintains seal compression and dimensional integrity under the higher sustained differential pressures generated by 1µm media at high flow rates
- Center Tube: Corrosion Resistant Steel — critical structural support in high-flow 1µm applications where sustained differential pressure across the media pack creates greater mechanical load on the element assembly than any coarser-rated configuration
Filtration Performance Rating
At 1µm across a long-body media pack, the SDZ8H maintains Beta 200/1000 multi-pass performance — verified per ISO 16889 — at the higher flow rates for which the L8 housing is specified. This is critical for central filtration systems and high-flow servo supply circuits where allowing particle ingestion during high-demand cycle phases would compromise the servo-grade cleanliness the entire installation is designed to achieve.
The SDZ8H’s 1µm Buna-N long-body configuration is the high-flow precision specification in the HC7500 SDZ series — delivering servo-valve-grade contamination control across the large flow volumes that the compact SDZ4H cannot serve without generating bypass-level differential pressure.
| Rating | Value |
|---|---|
| Beta Ratio (Bx) | 200 |
| Beta Ratio Bx[c] | 1000 |
ISO Standards Compliance
Manufactured to the full suite of ISO hydraulic filter standards for documented OEM-equivalent performance.
| 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 HC7500SDZ8H
The HC7500SDZ8H is specified for high-flow precision hydraulic applications where servo or proportional valve cleanliness is critical and system flow rates exceed the capacity of the compact L4 housing at 1µm. It appears in large CNC machining center central hydraulic systems, multi-axis industrial robot hydraulic supply units, precision metal forming press servo-hydraulic circuits, and large-scale test bench supply systems where 1µm filtration must be sustained across continuous high-demand operation. The Buna-N seal grade is the standard specification for these systems running mineral hydraulic oil, balancing the stringent filtration requirement with practical, cost-effective elastomer selection.
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 HC7500SDZ8H are trademarks of their respective owners, referenced here solely for cross-reference and compatibility identification purposes.