Overview
ISO 27407:2010 - Hydraulic fluid power - Marking of performance characteristics on hydraulic filters - defines a standardized method for marking filters so users can quickly identify and compare key performance characteristics. The standard covers marking on filter elements and spin-on filters, specifying symbol layout, required data fields and references to the test methods used to determine the marked values. Marking is intended for the filter itself; customers may also request the same information on drawings or packaging.
Key topics and technical requirements
- Scope of marking: Applies to performance information placed on the filter, a label or accompanying documentation.
- Marked characteristics (filter elements):
- Test flow rate (q)
- Terminal differential pressure (∆p)
- Average filtration ratio / beta ratio T βx(c) (per ISO 16889)
- Filter retained capacity to terminal differential pressure (C_R)
- Minimum collapse/burst pressure (pcb) (per ISO 2941)
- Differential pressure at rated flow (per ISO 3968)
- Marked characteristics (spin-on filters): All of the above plus:
- Installation procedure (tightening/installation symbols)
- Housing pressure limits (minimum housing burst pressure Bmin)
- Rated fatigue life (number of cycles Nf) and fatigue test cycle pressure range (per ANSI/(NFPA)T3.10.17)
- Symbol layout and graphics: Defines a general marking symbol (inlet/test parameters on left, tested characteristics on right) with graphical elements aligned to ISO 1219-1. Symbols must be legible and appropriately sized.
- Test method references: ISO 16889 (multi-pass method), ISO 2941 (collapse/burst), ISO 3968 (∆p vs flow), ANSI/(NFPA)T3.10.17 (spin-on fatigue/burst), ISO 1219-1 (symbols), ISO 5598 (vocabulary).
Applications and users
- Manufacturers: Standardize product markings, catalogs and test reports; improve traceability and claims substantiation.
- Design and OEM engineers: Select filters by comparable, clearly marked performance data (beta ratio, retained capacity, collapse/burst limits).
- Maintenance and reliability teams: Verify correct installation and service life expectations for spin-on filters.
- Purchasing and specification writers: Create procurement specs that mandate marked performance characteristics for supplier comparison.
- Certification and test labs: Report results using consistent marking formats.
Related standards
Using ISO 27407:2010 supports clarity in hydraulic fluid power systems by making filter performance data portable, comparable and traceable-helpful for selection, safety and maintenance decisions.