#WishIknew – What’s a valve positioner indicator?

Valves

When you have a question about process automation that needs a short answer, let us know with #WishIknew and @Visaya! We’ll reply with a #WishIknew post. It’ll give a quick explanation, then some related articles, videos, or reviews if you want to know more.

I wish I knew what a valve positioner indicator is!

You’ll see valve positioner indicators most often at on/off valves, sending feedback on the valve position to the controller. When you remotely open and close the valve, you need that feedback to make sure the valve responds to your commands.

Vendors sell a variety of valve positioner indicator, using different principles to convert mechanical movement into an electrical signal. And most valve indicators offer local visualization, so you can see if the valve is closed or open.

You also have many ways to collect the data sent from the valve indicators, from analog to digital communication. For a long time, DeviceNet held the top spot, offering simple structure and communication for this type of signal.

Image courtesy of sofisglobal.com

Today, the boom of wireless communication has helped a lot in monitoring valves. You can find vendors offering valve indicators with wireless communication built in. They also offer quick update times and reduce human errors, making them much more beneficial.

Plus, they eliminate the need for messy restrictive cables. Of course, you can use a cable solution if it suits you better, but you should probably check the other solutions first.

Best of all, some smart valve indicators will monitor the valve strokes and provide you with advanced diagnostics. Not bad at all.

Related tags: #WishIknew Basic Control valves devices English Measurements Principle Valve positioner indicator valves
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