Posts Tagged ‘Fisher’

Saving Project Timelines and Costs by Avoiding Control Valve Over-specification

Posted in Final Control Element on Tuesday, February 6th, 2018. No comments yet
Tags: , , , ,

Control valves are a critical part of process manufacturing processes and require great care in selection and specification. But what if the specifications are too stringent impacting both cost and lead times? The costs and delays can have an impact on the overall performance of a capital project. In a Processing magazine article, How To […]

Low-Bleed or Standard Relays for Control Valves?

Posted in Controllers & Positioners, Final Control Element on Tuesday, January 2nd, 2018. No comments yet
Tags: , , , ,

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 […]

Reliable Control Valve Performance in Ethylene Production

Posted in Chemical, Final Control Element on Tuesday, December 12th, 2017. No comments yet
Tags: , , , ,

Olefins, also known as alkenes, are unsaturated hydrocarbons, use to make many petrochemical products such as plastics. Olefin production, including ethylene, propylene and butadiene products, requires tight control for higher throughput, more energy efficient, and more reliable operations. In an article from The Chemical Engineer, Increasing Ethylene Conversion and Plant Reliability, Emerson’s Blake Coleman describes […]

Safety Shutdown Valve Local Control Panel

Posted in Final Control Element on Tuesday, October 4th, 2016. No comments yet
Tags: , , , , , ,

For process manufacturers and producers with safety shutdown applications, local control panels are often installed to provide visibility and control actions to operators locally out in the process area. Actions can be taken at these panels to initiate an emergency shutdown. I caught up with Emerson’s Riyaz Ali about how these local control panels work […]

Adsorption Process to Separate Fluid Components

Posted in Final Control Element on Wednesday, July 27th, 2016. 2 comments so far
Tags: , , , , ,

Many techniques are used to separate impurities in fluids. One common method is to use the process of adsorption. In an online document, Control Valve Sourcebook — Chemical Unit Operations, adsorption is defined as: …a typical mass transfer operation used in process plants to remove or separate specific components of a liquid or gaseous mixture. […]