Instrumentation and control
Control valves
Kv flow coefficient and valve characteristics.
Instrumentation and control
Flow through valve from Kv
Q = Kv√(Δp/SG)→Instrumentation and controlRequired valve Kv
Kv = Q√(SG/Δp)→Instrumentation and controlLinear valve characteristic
Q = Qmax x/100→Instrumentation and controlEqual-percentage valve characteristic
Q = Qmin R^(x/100)→Instrumentation and controlValve position from signal
L = Lmin + (S−Smin)/(Smax−Smin)(Lmax−Lmin)→Instrumentation and controlSignal from valve position
S = Smin + (L−Lmin)/(Lmax−Lmin)(Smax−Smin)→