Posts Tagged ‘digital valve controller’

Low-Bleed or Standard Relays for Control Valves?

Posted in Controllers & Positioners, Final Control Element on Tuesday, January 2nd, 2018. No comments yet
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Happy New Year everyone! I hope your holidays helped to recharge your batteries and get you off to a great start for 2018. I saw this exchange in my email over the holidays about the effects of using low-bleed relays with Fisher DVC6200 digital valve controllers for control applications as compared to standard relays. This […]

5 Questions for Digital Valve Controller and Safety Expert Riyaz Ali

Posted in Controllers & Positioners, Safety on Wednesday, May 3rd, 2017. No comments yet
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Let’s continue our 5 Questions for an Emerson Expert podcast series with our guest, Riyaz Ali. You may recall Riyaz from numerous posts about digital valve controllers and final control elements in safety instrumented system applications. He has almost 40 years’ experience in process control instrumentation and holds numerous patents related to use of digital […]

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Reducing Valve-Induced Unplanned Downtime

Posted in Controllers & Positioners on Thursday, May 26th, 2016. One comment so far
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Valves are the critical components in any process manufacturing and production operation that touches what is being produced. As such, they are subject to wear and tear. An ARC View report, Leveraging IIoT Technologies to Reduce Valve-Related Unplanned Downtime highlights key points from a presentation by Emerson’s Shawn Anderson at the ARC Advisory Group’s 20th […]

Setting Up and Calibrating Valve Positioners

Posted in Controllers & Positioners on Monday, February 15th, 2016. No comments yet
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Short videos are great ways to show how to perform an activity, such as calibrating a valve’s actuator to move the valve stem based on the 4-20mA signal it receives from the control system. In this under 5-minute “how-to” video, Emerson’s Alex Quah Shu Min demonstrates the setup and calibration procedure for the Fisher 3582i […]

Separate versus Integral Final Element Accessories Questions

Posted in Final Control Element, Safety on Thursday, December 10th, 2015. No comments yet
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A post from a few years ago, Separate Versus Integral Final Element Accessories in Safety Applications, continues to generate some good questions. I thought I’d make these questions and associated answers more visible in today’s post. Here’s the first question: I understood the whole description, But while calculating PFDavg, We will have to add the […]