Industrial valves - Part-turn actuator attachments (ISO 5211:2023)

This document establishes comprehensive technical requirements and test methods for the mounting accessories of quarter-turn valves in industrial applications. It defines the interface between valve operating mechanisms and actuators, ensuring compatibility across various manufacturers and products. The specification covers essential parameters such as the size and arrangement of mounting flanges, bolt circle diameters, and connection dimensions for drive shafts. By standardizing these mechanical interfaces, the document facilitates the interchangeability of components and simplifies the assembly process for valve operators. It addresses both manual and automated actuation systems, providing guidance on dimensional tolerances and marking requirements to ensure reliable performance under operational conditions. The content serves as a reference for designers, manufacturers, and users involved in the selection and integration of valve control systems within fluid handling infrastructure.