Posts Tagged ‘low-bleed positioner’

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 […]

Positioner Pneumatic Pressure Bleed in Throttling Control Valves

Posted in Energy, Final Control Element on Tuesday, June 14th, 2011. 2 comments so far
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With the emphasis on improving energy efficiency and reducing greenhouse gas emissions, process manufacturers have turned to pneumatic low-bleed and zero-bleed valve positioners. Emerson’s Riyaz Ali copied me on an email about a recent article that mentioned a zero-bleed valve positioner. Riyaz noted that positioners mounted on valves used in throttling applications need to be […]