Dong,

You'd be better off to ask Eng-Tips Forum for that type of information (unless you're talking pneumatics).

A globe valve is like a Gate Valve - when it is half to three-quarters closed - equivalent to say 10.5 diameters of pipe loss. Most texts (such as Crocker - Piping Handbook) quote Crane Co. If you want something more accurate talk to your valve Vendor. ■

Mr John Rz

Are You moderator?

Cengiz Yldz ■

No ■