Historical
ISO 7789:1998
Hydraulic fluid power - Two-, three- and four-port screw-in cartridge valves - Cavities
This International Standard specifies the dimensions and provides other data relating to cavities in which two-, three- and four-port, screw-in cartridge valves are mounted in order to ensure interchangeability.
It is applicable to two-, three- and four-port screw-in cartridge valves generally used in industrial, agricultural, mining and mobile equipment.
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International Organization for Standardization [iso]
International Organization for Standardization [iso]