1 Scope
This Standard specifies terms and definitions of driving device, flange symbols and their maximum torque, flange dimensions necessary for the attachment, driving component structure and dimensions of part-turn actuators.
This Standard is applicable to the valve driving devices for ball valves, butterfly valves and plug valves, and the valves dimensions necessary for the attachment. Such dimensions also applicable to the attachment of driving device to gear case, and the attachment of gear case to valves.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 196 General Purpose Metric Screw Threads — Basic Dimensions (GB/T 196-2003, ISO 724:1993, MOD)
GB/T 1095 Square and Rectangular Keyways
3 Terms and Definitions
