This Standard specifies the requirements for the attachment of multi-turn actuators to valves. Throughout this Standard, ""actuator"" may be understood as ""actuator and/or gearbox"". It specifies: -those flange dimensions which are necessary for the attachment interface of actuators to general purpose industrial valves; -those driving component dimensions of actuators which are necessary to attach them to the driven components; -reference values for torque and thrust for flanges having the dimensions specified in this Standard.
DS/EN ISO 5210:1997 history
1997DS/EN ISO 5210:1997 Industrial valves - Multi-turn valve actuator attachments