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...
I wanted to share a quick question and answer in an email exchange in case you may have a similar question sometime down the road. The original question was: The Project is about installing two manual Fisher control valves but we want to modify it to include obtaining...
In the Process Control LinkedIn group, a question was asked: Positioners seem very popular now, but most lines with valves have flow meters attached. Won't a flow loop make the positioner redundant? When asked for clarification, the original poster explained: As far...
Unless your plant or production facilities was recently built, chances are that your process has a mix of automatic and manual control. A common area for manual control are on-off valves used in many general purpose applications such as tank filling and emptying,...
You may have seen the news of the 2013 HART Plant of the Year noting: HART technology has helped reduce production downtime related to control valve failures… We use the HART signal to monitor real time valve conditions which has helped with identifying problems...
If you work with pumps in your facility, you may be familiar with the Empowering Pumps site, a wealth of information to help you with these important assets in your plant. Founder Charli K. Matthews has launched something similar for valves, Empowering Valves. I had...
I knew when my son went to YouTube before coming to me when he needed to learn how to tie a tie--that howto videos were valuable, easily discoverable, and broadly used. I've share examples such as How To Install Micro Motion 9739 MVD Electronic Modules on how process...
Control systems provide signals to control valves to regulate their position per the requirements of the control strategy. It is good engineering practice, especially for critical control valves to have valve travel feedback from independent devices such as position...
One of the great things about conferences such as last week's Emerson Exchange Americas conference is reconnecting face-to-face with people where some time has passed. I had the chance to connect with Emerson's Riyaz Ali, whose expertise I've highlighted in several...
A few months ago, I attempted to clear up some misconceptions about the use of digital valve controllers in safety applications in a post, Clarifications on the Use of the DVC6000 SIS in Safety Applications. It addressed misconceptions about references to the obsolete...
Plants tend to run longer in between turnarounds, or the period of time in which a plant is shut down for maintenance. These turnaround time intervals can be three, four, five, or even longer depending on the process and the industry. Emerson's Riyaz Ali, whom you may...
A few weeks ago, I highlighted a thread from the ISA Safety email list on partial stroke testing using control valve positioners. A few weeks later, this thread is still going strong. Emerson's Riyaz Ali sent me some of the recent exchanges. A concern was expressed...
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The opinions expressed here are the personal opinions of the authors. Content published here is not read or approved by Emerson before it is posted and does not necessarily represent the views and opinions of Emerson.