O'Reilly logo

Process Control: Modeling, Design, and Simulation by B. Wayne Bequette

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

M15.3. Control Valves

The relationship for flow through a valve is

Equation M15.15

where F is the volumetric flow rate, Cv is the valve coefficient, x is the fraction of valve opening, ΔPv is the pressure drop across the valve, s.g. is the specific gravity of the fluid, and f(x) is the flow characteristic.

Three common valve characteristics are linear, equal-percentage, and quick-opening. For a linear valve,

Equation M15.16

For an equal-percentage valve,

Equation M15.17

For a quick-opening valve

Equation M15.18

The three characteristics are ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required