Figure 2. Example of a centrifugal pump flow-control loop ... pressure losses and/or a centrifugal pump head curve. Figure 3. Typical inherent control valve flow characteristics. Figure 4. Installed ...

Pump discharge pressure = 3,000 psi. Base dP for control valve = 11 psi. Dynamic losses at design flow = 1.2 times normal flow. Control valve dP = (0.05 x 3,000) + 1.1 x [(1.2)2 – 1] x 75 +11 ...

Figure 2 shows the instantaneous pressure as liquid moves through a control valve. The inlet and outlet cross-sectional areas of a valve are much larger than the control area, such as the cage or the ...

A new control valve is less vulnerable to damage by high-velocity fluid. Control valves experience significant reaction loads when they regulate choked flow. The highly restrictive, complex flow ...