Expert’s answer : What are the types of final control elements?

This is a very broad question. The right final control element for your application will depend on your process requirements. So I can’t make a recommendation without your process information.

However, I can list a few types of final control elements on the market. Then you’ll have a better idea of what’s out there and what might suit you.

image for final control elements
Courtesy of dvccon.com

Control valve

The control valve appears in various segments to control all kinds of gases and liquids. These come with a vast list of plugs, actuators, positioners, materials, and bodies. So you could probably mix and match a solution from the options.

Here are some articles that can teach you more about control valves:

What do you need to know about control valves?
What do you need to know about control valve positioners?

Variable frequency drive

The variable frequency drive (VFD) can control the velocity of air conditioning motors. And if you have a pump or fan connected to the motor, then the VFD can help with those too.  As you can see, the variable frequency drive can bring a lot of benefits to your process.

You can read more in this article:

#WishIknew – What’s a variable frequency drive?

Solenoid valve

With an on/off control, you can apply an on/off valve or a solenoid valve, depending on the application. So these simple valves may provide just what you need. Don’t expect much extra, though.

You can read more about solenoid valves in this article:

#WishIknew – How a solenoid valve works and how to apply it in a control valve

Damper

For air control, a damper comes up as a popular solution. This device works specifically for air control in several scenarios on a variety of pipes.

This list only touches on a few of the final control elements out there. If you have further questions, then drop us a line and we’ll try to help some more.

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