Stephen Hall discusses the golden rules for design. This month I explain how to calculate a system curve, overlay it on a pump curve, and determine the flow rate that the pump will deliver through ...

Matching the motor and pump curves to the system curve is an essential task for industrial maintenance professionals. It ensures optimal performance, efficiency, and reliability of your fluid system.

A pump with a throttle valve control. > FIGURE 4. A pump with a throttle valve control pump curve. The advantages are: i. It’s good for systems that have stable flow requirements close to 100%; ii. It ...

The dynamic head constant K is a constant for a given system. However, if a control valve position changes in the system, then the constant K will also change. Conventional System. Figure 1 shows a ...

Note that the difference between the boiler feed pump head-flow curve and the system resistance curve (Figure 1) provides the basis for the pressure drop available for the drum level control valve.

Please advise me on my understanding. Your handbook, Volume 2, Chapter 6, ”Control Valve Selection and Sizing,” says, "The proper approach to the selection of valve pressure drop is to first determine ...

Myke King shows how signal conditioning can resolve non-linearities. CONTROL engineers prefer linear processes. Taking flow control as an example, they like to see a linear relationship between the ...

Since a centrifugal pump operates at the intersection of a pump curve and a system curve, by varying the system curve the operating point of the pump easily is changed. (See Figure 1.) The convenience ...

Throttling basically changes the location and slope of the system curve while the pump curve remains fixed. Contrast this with the situation under VFD control. Here, the VFD changes the pump curve ...