In order to get good control with stability throughout the full range of required flow rates, one must use a control valve that has an installed flow characteristic that is linear, or at least as close to linear as possible in most systems.

It's important to understand the importance of proper control valve sizing. If the valve is too small, it won't be able to pass the required flow. In actual practice, undersized valves are fairly uncommon, but oversized valves are all too common.

Jon F. Monsen, Ph.D., P.E., a control valve technology specialist for Valin Corporation, has written a book detailing the many facets of control valves. The book, Control Valve Application Technology, Techniques and considerations for properly selecting the right control valve. Learn more.

When control valve professionals talk about "control valve sizing," they really mean the entire process of selecting the valve that will do the best job of controlling the process. Selecting the right size valve is an important part of the process, but there are other equally important considerations as well.

Purchase Valin's Control Valve Application Technology book today to learn how to apply the right techniques to selecting the correct control valves.

This is Part II in a four-part series based on the contents of the new textbook, "Control Valve Application Technology, Techniques and Considerations for Properly Selecting the Right Control Valve."

This article discusses the importance of selecting the correct flow characteristic and correctly sizing the valve in order for the valve to properly control the process.

Certain frequencies of sound can play havoc on industrial equipment. When control valves are not selected appropriately, there is an increased risk for cavitation, which causes high noise and vibration levels, resulting in very rapid damage to the valve's internals and/or the downstream piping.

The noise abatement laws, and health and safety legislation are becoming increasingly strict. Metso introduces Q2- Trim, the optimum solution for noise problems, that at the same time fulfills all legislative requirements and customer needs.

Loss of containment is one of the costliest things that can go wrong at a plant. Accordingly, smart enterprises employ a variety of measures that ensure loss of containment just doesn't happen or when it does, the adverse circumstances are kept to a minimum.

In a recent interview with VALVE Magazine, Dr. Monsen discussed how the analysis of installed gain can be a guideline for selecting the control valve that will provide good control with stability throughout the full range of required flow rates.