loss coeffiecients in ball valves
loss coeffiecients in ball valves
(OP)
hi, im looking for some help on what the typical loss coefficients for a fully open 3" ball valve might be and the response type, eg; equal percentage, linear, etc.
i cant seem to find any useful data anywhere on this, any ideas?
i cant seem to find any useful data anywhere on this, any ideas?





RE: loss coeffiecients in ball valves
For varaition in loss coefficient with valve position:
Valve Angle (deg.)
Ball/pipe area Ball/pipe area
1.0 0.7
Loss coeff.,K
0.1 90
0.5 80 90
1.0 74 85
5 55 73
10 45 68
50 27 51
100 20 44
400 10 30
points taken from Ref. Miller D.S. (1990) "Internal Flow Systems" 2nd Ed. BHRA (Information Services)