scope:

Specifies requirements for the attachment of part-turn actuators, with or without gearboxes, to industrial valves. The attachment fo part-turn actuators to control valves shall conform with the requirements of this standard only when subject to an agreement between the supplier and the purchaser. This standard specifies: - those flange dimensions which are necessary for the attachment of part-turn actuators to industrial valves or to intermediate supports; - those driving component dimensions of part-turn actuators which are necessary to attach them to the driven components; - reference values for torques for interfaces and for couplings having the dimensions specified in this standard.