on/off contol valve
on/off contol valve
(OP)
I need to spec. out an on/off full port valve on the 150# steam line that feeds the turbine. This valve is a 2" ball valve. I do not have Cv of the valve to come up with delta p thru the valve. How should I spec this valve when Cv is not known yet? Thanks





RE: on/off contol valve
In the mean time,
For 2" fT = 0.019
K1 = 3fT
CV = 29.9d2/(K1)0.5
Otherwise, contact the valve vendor or manufacturer.
Good luck,
Latexman
To a ChE, the glass is always full - 1/2 air and 1/2 water.
RE: on/off contol valve
RE: on/off contol valve
More important would be to spec out (a) the max permissible closing time for this steam turbine service (b) whether you need a double trip valve configured to work as an automated double block and bleed to ensure there is no steam leakage in to the turbine body that could otherwise cause temperature bow.