IEC 60534-3-2:1984 Industrial-process control valves.. Part 3 : Dimensions. Section Two : Face-to-face dimensions for flangeless control valves except wafer butterfly valves.
2001IEC 60534-3-2:2001 Industrial-process control valves - Part 3-2: Dimensions; Face-to-face dimensions for rotary control valves except butterfly valves
1984IEC 60534-3-2:1984 Industrial-process control valves.. Part 3 : Dimensions. Section Two : Face-to-face dimensions for flangeless control valves except wafer butterfly valves.