Baldwin PT397, direct aftermarket replacement. This filter is an aftermarket hydraulic filter designed as a direct replacement for filters from leading brands including Asas, Baldwin, Coopers, Donaldson, Fai Filtri, Fil Filter, Fleetguard, Fram, Hastings, Ingersoll Rand, Napa, Orenstein + Koppel (O&K), and Oxfil. It uses impregnated paper media with a 10 µm filtration rating, ensuring effective removal of contaminants from hydraulic systems. With a total height of 300 mm, largest inner diameter of 110 mm, and largest outer diameter of 150 mm, this filter is built to the original dimensions and ratings for reliable performance. The element collapse pressure of 5 bar and out-in flow direction make it suitable for demanding hydraulic applications.
Technical properties & cross references
Specifications
| Element Collapse pressure |
5 bar (73 PSI) |
| Filtration Media |
Impregnated Paper 10 µm |
| Media type |
Impregnated Paper |
| Filtration Rating |
10 µm |
| Flow direction |
Out-In |
| Total Height |
300 mm (11 13/16") |
| Largest Inner Diameter |
110 mm (4 11/32") |
| Largest Outer Diameter |
150 mm (5 29/32") |
| 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 32.50 |
16 Oct 2026 |
| G&T Engine Parts |
USD 45.15 |
11 Oct 2026 |
| FilterFinder Online |
USD 76.00 |
11 Oct 2026 |
| Spare Part Mart |
USD 26.00 |
Today |
Our price of USD 26.00 is 20% to 66% 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-Contamination Environments
In dusty or dirty operating conditions, the 10 µm impregnated paper media captures fine particles that can cause wear. This filter helps extend hydraulic component life by maintaining oil cleanliness.
Continuous-Duty Machinery
For equipment running long hours, the 5 bar collapse pressure ensures the filter withstands pressure spikes without failing. This reduces unplanned downtime and maintenance intervals.
Fleet Maintenance Consolidation
Workshops servicing multiple brands can standardise on this filter as it cross-references many OEM numbers. This simplifies inventory management and reduces the risk of stocking the wrong filter.
Ingersoll Rand Equipment
Specifically compatible with Ingersoll Rand machinery, this filter provides a cost-effective aftermarket option for hydraulic systems in compressors and industrial equipment.
Frequently asked questions
How do I confirm this filter fits my machine?
Check your existing filter's cross-reference numbers. This filter replaces models from Asas, Baldwin, Coopers, Donaldson, Fai Filtri, Fil Filter, Fleetguard, Fram, Hastings, Ingersoll Rand, Napa, Orenstein + Koppel (O&K), and Oxfil. Compare dimensions: height 300 mm, largest inner diameter 110 mm, largest outer diameter 150 mm.
What is the filtration rating and media type?
The filter uses impregnated paper media with a 10 µm filtration rating. This means it captures particles as small as 10 microns, suitable for standard hydraulic systems.
What are the key dimensions and thread?
Total height is 300 mm, largest inner diameter is 110 mm, and largest outer diameter is 150 mm. The flow direction is out-in. Thread specifications are not provided; please verify compatibility with your housing.
Is this an OEM or aftermarket filter?
This is an aftermarket filter, built to the original dimensions and ratings. It is a direct replacement for the listed brands but is not a genuine OEM product.
How do I install this filter?
Installation is similar to the original filter. Ensure the system is depressurised, remove the old filter, lubricate the gasket, and tighten to the manufacturer's recommended torque. Follow your equipment's manual for specific steps.