Pall HC7500SCT4Z Replacement Filter Element — Cross-Reference & Specifications
Hydrafil Part Number: BF-PAL-996875-L4-25MV | Ships same day from Detroit, MI | OEM-equivalent performance
The HC7500SCT4Z combines a 25-micron microglass element with a Viton (fluorocarbon) seal in the short 6.9 in L4 body — purpose-built for coarse filtration in compact hydraulic systems that happen to run fire-resistant or elevated-temperature fluids. While 25µm is typically associated with general-purpose petroleum-based hydraulics, the Viton seal on this variant opens the door to space-constrained circuits using phosphate ester, polyol ester, or HFC fluids, or to hot-running systems where a Buna seal would fail prematurely from heat-induced compression set.
Dimensional Specifications
An exact dimensional match is required for proper housing seating, bypass valve operation, and full-perimeter seal engagement.
| 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
Material selection in this element balances particle capture efficiency with dirt-holding capacity for the fluid chemistry and operating conditions where this variant is deployed.
- Filtration Media: Microglass Fiber Media — higher dirt-holding capacity than cellulose at the 25-micron rating, delivering long service intervals in high-flow, coarse-contamination hydraulic circuits
- Seal Material: Viton (Fluorocarbon) — fluorocarbon seal rated for phosphate ester (Skydrol, Fyrquel), polyol ester, HFC/HFD fire-resistant fluids, and synthetic hydraulic fluids; maintains elasticity and sealing compression set at continuous operating temperatures up to 400°F
- End Caps: Corrosion Resistant Steel — corrosion resistant for long service life
- Center Tube: Corrosion Resistant Steel — maintains structural integrity under pressure cycling and differential pressure spikes during cold-start flow surges
Filtration Performance Rating
At 25 microns, this element is tuned for bulk contamination control — capturing coarse wear debris, pipe scale, weld slag from new-build systems, and the larger ingressed particles that pose immediate risk of catastrophic pump damage or valve spool seizure. The coarse rating also minimizes clean-element pressure drop, which matters on cold-start and high-flow systems where finer elements would saturate prematurely.
The filtration rating is verified to Bx = 200 (≥99.5% capture at the rated micron size) and Bx[c] = 1000 (≥99.9% capture) per ISO 16889 multi-pass testing — the methodology that measures real-world efficiency under sustained contaminant loading, not the single-pass nominal ratings that older filter specifications sometimes cite.
A 25µm Viton element in the L4 compact body is the specification for heat-exposed or fire-resistant-fluid hydraulic circuits where element envelope is constrained — think aluminum die casting auxiliaries, steel mill roll-line hydraulics, and thermal processing equipment running synthetic or ester-based fluids. The compact L4 format fits tight housing bays while the fluorocarbon seal resists both high temperature and aggressive synthetic fluid chemistry.
ISO Standards Compliance
This element is manufactured and tested to the hydraulic filter standards that govern structural integrity, fabrication quality, fluid compatibility, and filtration 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 HC7500SCT4Z
The HC7500SCT4Z is specified into small-envelope hydraulic systems that operate in hot or chemically aggressive environments — metal processing auxiliary hydraulics, thermal oil system bypasses, aerospace ground support carts running phosphate ester, and marine auxiliary equipment on older fire-resistant fluid specs. The 25µm rating remains appropriate for standard pump protection in these systems, while the Viton seal survives the fluid and temperature conditions that would degrade Buna-N.
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
Shop the BF-PAL-996875-L4-25MV
Questions? Call (313) 915-4120 or email sales@hydrafil.com
Pall and HC7500SCT4Z are trademarks of their respective owners, referenced here solely for cross-reference and compatibility identification purposes.