Fleetguard ST1850, direct aftermarket replacement. This filter is an aftermarket hydraulic filter element designed as a direct replacement for filters from Fai Filtri, Fleetguard-ST, Internormen, Oxfil, Paus, and Stauff. It features inorganic microfibers media with a 25 µm filtration rating, providing effective particle removal for hydraulic systems. With an element collapse pressure of 210 bar and out-in flow direction, this filter is built to the original dimensions and ratings for reliable performance in demanding applications.
Technical properties & cross references
Specifications
| Element Collapse pressure |
210 bar (3046 PSI) |
| Filtration Media |
Inorganic Microfibers 25 µm |
| Media type |
Inorganic Microfibers |
| Filtration Rating |
25 µm |
| Flow direction |
Out-In |
| Total Height |
109 mm (4 9/32") |
| Largest Inner Diameter |
22.1 mm (7/8") |
| Largest Outer Diameter |
44.5 mm (1 3/4") |
| Stat. HS-Code |
84149000 |
| Country of Manufacture |
China |
Price beat guarantee
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller |
Price |
Checked |
| Oxfil |
USD 47.07 |
16 Oct 2026 |
| SONA Filtration |
USD 54.93 |
11 Oct 2026 |
| Filtration Point |
USD 59.31 |
11 Oct 2026 |
| Cardinal Filters |
USD 67.19 |
11 Oct 2026 |
| Hydrafil |
USD 125.95 |
11 Oct 2026 |
| Spare Part Mart |
USD 37.66 |
Today |
Our price of USD 37.66 is 20% to 70% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Use cases & applications
High-Pressure Hydraulic Systems
Ideal for systems operating under high pressure, the 210 bar collapse pressure ensures the element maintains integrity even during pressure spikes, protecting downstream components.
Continuous-Duty Industrial Machinery
Suitable for round-the-clock operations where consistent filtration is critical. The inorganic microfibers media offers stable efficiency over extended service intervals, reducing maintenance frequency.
Mobile Equipment in Dusty Environments
Designed for out-in flow, this filter traps contaminants on the outside of the element, making it effective in mobile hydraulic systems exposed to dust and debris.
Inventory Consolidation for Multi-Brand Fleets
Cross-referencing multiple brands (Fai Filtri, Fleetguard-ST, Internormen, Oxfil, Paus, Stauff), this single part number simplifies stock management for workshops servicing diverse equipment.
Frequently asked questions
How do I confirm this filter fits my equipment?
Check your current filter's part number against the cross-reference brands: Fai Filtri, Fleetguard-ST, Internormen, Oxfil, Paus, or Stauff. If it matches, this filter is a direct replacement.
What is the filtration rating and media type?
This filter uses inorganic microfibers media with a 25 µm filtration rating, suitable for capturing fine particles in hydraulic oil.
What are the dimensions and thread?
Total height is 109 mm, largest outer diameter 44.5 mm, and largest inner diameter 22.1 mm. No thread specification is provided; ensure your housing fits these dimensions.
Is this an OEM or aftermarket part?
This is an aftermarket replacement built to the original dimensions and ratings. It is not a genuine OEM part but is designed to fit and perform as a direct replacement for the listed brands.
How do I install this filter element?
Installation follows standard hydraulic filter replacement: remove the old element, clean the housing, insert the new element with flow direction out-in, and reassemble. Always follow your equipment manual.