This International Standard establishes a selection of nominal pressures for hydraulic and pneumatic fluid power connectors and associated components.
NOTE — There may be a need to provide a selection of nominal pressures for connectors and associated components used in applications where the external pressure on the components is greater than the internal pressure, for example vacuum service. A document which deals with this subject will be established in due course.
DS/ISO 4399:1989 history
1989DS/ISO 4399:1989 Fluid power systems and components. Connectors and associated components. Nominal pressures