ISA 75.08.09 PDF

This standard applies to sliding stem flangeless control valves, sizes 20 mm (3/4 inch) through 600 mm (24 inches) for Classes 150, 300, and 600. 

The face-to-face dimensions listed apply only to control valves that will be bolted between flanges. 

This standard is not intended to include rotary valves, such as butterfly valves. 

Purpose

The purpose of this standard is to aid users in their piping designs for sliding stem flangeless control valves by providing valve face-to-face dimensions without giving special consideration to the equipment manufacturer to be used.