Overview
ISO/TR 17209:2013 - "Hydraulic fluid power - Two-, three- and four-port screw-in cartridge valves - Cavities with ISO 725 (UN and UNF) threads" defines the dimensional data and related information for machined cavities that accept screw-in cartridge valves with UN and UNF threads. The Technical Report ensures dimensional interchangeability for two-, three- and four-port cartridge valves commonly used in industrial, agricultural, mining and mobile equipment. It complements metric-thread cavity standards (e.g., ISO 7789) by covering cavities using ISO 725 (UN/UNF) thread forms.
Key topics and technical requirements
- Scope and purpose: Specifies cavity forms, sizes and minimum clearances so cartridge valves from different manufacturers fit common manifolds and blocks.
- Dimensions and figures: Detailed cavity geometries for two-, three- and four-port configurations are given in figures and tables; all dimensions are shown in millimetres.
- Threading and ports: Uses ISO 725 thread forms and references port form and sealing per ISO 11926-1.
- Tolerances and surface finish:
- Manufacturing notes:
- Lead-in angles and multi-diameter form tooling recommendations.
- Edge rounding guidance (typical radius 0.1 mm to 0.2 mm).
- Suggested pre‑machining depths and minimum sealing length (dimension T) to achieve required tolerances.
- Clearance recommendations for axially fitting tools (box spanner) and allowance for electrical connectors or adjustments.
- Identification and marking: Valve functions in manifolds should be identified/marked per ISO 9461 and ISO 16874.
- Usage cautions: A given cavity may accept valves of different functions - check valve function marking and compatibility.
Applications
- Ensures interchangeability of hydraulic cartridge valve cavities in:
- Manifold and block design for hydraulic systems
- OEM hydraulic equipment (industrial, agricultural, mining, mobile)
- Aftermarket manifolds and repair/maintenance operations
- Benefits include simplified valve selection, easier supplier comparison, standardized tooling and reduced variety of non‑standard cavities.
Who should use this standard
- Hydraulic manifold and block designers
- Valve and cartridge manufacturers
- OEMs, system integrators and maintenance engineers
- Purchasing and quality teams verifying compatibility and interchangeability
Related standards
Use keywords: ISO/TR 17209:2013, hydraulic fluid power, screw-in cartridge valves, ISO 725, UNF threads, valve cavities, dimensional interchangeability, manifold design.
Open preview (PDF)Hydraulic fluid power — Two-, three- and four-port screw-in cartridge valves — Cavities with ISO 725 (UN and UNF) threads
