ISO 5599-2:2001

Overview

ISO 5599-2:2001 specifies standardized mounting interface surfaces for five-port, four-way pneumatic directional control valves with an optional electrical connector. Intended for valves up to a maximum rated pressure of 1.6 MPa (16 bar), the standard defines dimensional features, port and actuation identification, electrical connector mating geometry and basic electrical/contact requirements to promote interchangeability between valve manufacturers.

Key topics and technical requirements

• Dimensional requirements and tolerances for interface features and mounting surfaces across sizes 1E–6E, including orifice areas (examples: 79, 143, 269, 438, 652, 924 mm²).
• Surface condition: specified surface roughness Ra = 1.6 µm and flatness 0.1 mm over 100 mm for the mounting area.
• Port and orifice identification: principal flow ports numbered 1–5 and actuation orifices 12 and 14 (port 14 preferred for single-source external solenoid pilot supply). Defined actuation results and monostable valve stable position rules.
• Electrical connector specification (optional): connector must be removable, rated 300 V AC/DC, with contact arrangement of four live contacts plus one earth. Earth contact must make first and break last and is 1.5 mm longer than other contacts. Pins: 2.03–2.18 mm diameter; connector contact assignments and orientation (contacts 1 & 4 parallel to valve port slots; 1 & 3 for single solenoid; 2 & 4 for second solenoid; contact 5 earth). Wire cross-section guidance: 0.75–2.5 mm².
• Mounting interface drawings and tolerances: figures and tabulated dimensions for precise base/valve mating and connector envelope/engagement depths.
• Note: ISO 5599-2 addresses interface geometry and identification - it is not applicable to valve functional characteristics.

Applications

• Ensures mechanical and electrical interchangeability of five-port directional control valves in:
  • Industrial automation and pneumatic actuators
  • Machine tool and assembly-line OEM equipment
  • Modular valve manifolds and quick-change pneumatic modules
  • Maintenance and spare-part sourcing where cross-vendor compatibility is required

Who should use this standard

• Pneumatic valve manufacturers and designers
• Machine builders and system integrators
• Control-panel and manifold block designers
• Maintenance engineers specifying replacement valves or retrofit modules

Related standards

• ISO 5599-1 (mounting surfaces without electrical connector)
• ISO 5599-3 (code system for valve functions)
• ISO 11727 (identification of ports and control mechanisms)
• GPS and surface standards cited: ISO 1101, ISO 1302, ISO 4287, ISO 4288, and ISO 5598 (vocabulary)

Recommended identification statement for documentation:
“Mounting interface dimensions conform to ISO 5599-2:2001, Pneumatic fluid power - Five-port directional control valves - Part 2: Mounting interface surfaces with optional electrical connector.”

Keywords: ISO 5599-2:2001, pneumatic fluid power, five-port directional control valves, mounting interface surfaces, electrical connector, port identification, dimensional tolerances, valve interchangeability.