Equivalent length in terms of D for L/T type ball valves

[frogcurry]

Does anyone know of a reference that gives equivalent lengths for pressure drop calculation for L and T type ball valves? (Those that I possess only deal with the normal breeds of valve.)

Alternatively, a logical conservative adjustment to the standard ball valve allowance for these internal shapes (which I assume will increase pressure drop) would be appreciated.

Thank you to anyone who assists with this enquiry.

 

[EGT01]

If by saying L or T type ball valve you are referring to a 3way type ball valve, here is one link to a 3way ball valve manufacturer (KTM).

http://www.tycovalves-na.com/literature.asp

They provide a Cv rating for their valves which you could convert to a resistance coefficient or equivalent length as you like. However, I would suggest you get the desired information from the manufacturer of the valve you have.