Articles

1721-1740 of 2138 < first | | | last >
  • 10 tips for diagnosing control valve problems

    To make the most of diagnostic equipment used in chemical processing, technicians must stretch their knowledge of control valves and related diagnostic equipment that keeps tabs on valve health and safety.

    David W. Douglas
    01/22/2007
  • Exporters get reporting relief

    EPA eases annual reporting requirements and thresholds, and exporters are feeling relief, according to Lynn Bergeson in her monthly Compliance Advisor column.

    Lynn Bergeson, regulatory editor
    01/08/2007
  • Understand and Control Hot Vapor Bypass

    Contributing Editor Andrew Sloley says pressure control technique works well if implemented properly, in this month's Plant InSites column.

    Andrew Sloley, contributing editor
    01/08/2007
  • pH sensor stands up to tough conditions

    Design provides improved reliability in a polymer-precursor batch reactor. Sensors must respond quickly and survive a harsh environment. Poor probe reliability can make the difference between a process that makes money and one that doesn’t.

    Kyle Becker, Polychemie
    01/08/2007
  • Distillation control and optimization, Part 3

    Control's Béla Lipták continues his series on control of distillation processes, this time focusing on managing reboiler flow, temperature, feed rate, loading and reflux for economy, stability and safety.

    Béla Lipták, PE, CONTROL Columnist
    01/05/2007
  • Know when to leave a sinking ship

    The unspoken truth about projects is that they all come to an end, according to Dirk Willard in this month's Field Notes column. The key, he says, is knowing when to leave.

    Dirk Willard, senior editor
    01/03/2007
  • How to select control valves, Part 3

    When it comes to selecting and sizing control valves, gain and stability are key characteristics. The non-commercial valve selection chart in this article serves as a reference tool you can download.

    Béla Lipták, Contributing Writer
    12/19/2006
  • Take the right first step to manage your energy costs

    Conducting an energy assessment provides a business plan for improvements and is the first step to managing energy costs, according to Chemical Processing's energy columnist Christopher Russell.

    Christopher Russell, energy columnist
    12/18/2006
  • Making Your Process Operator-Proof

    Senior Editor Dirk Willard discusses Shigeo Shingo's take on mistake-proofing, or Poke Yoke, if you speak Japanese. The practice suggests the following devices: eliminate — redesign, facilitate — guide, mitigate — lessen the damage caused by the error, or flag — identify the error.

    Dirk Willard, senior editor
    12/05/2006
  • Make jacketing your strong suit

    Small details in jacketed-pipe configuration can have a big impact, according to Chemical Processing's Contributing Editor Andrew Sloley.

    Andrew Sloley, contributing editor
    12/05/2006
  • NeSSI’s success should be a lock

    The New Sampling/Sensor Initiative or NeSSI that replaces tubing, fittings and other hardware in a sampling system with miniature modular components makes sense. Enhancements now in the works should assure its success.

    Mark Rosenzweig, editor in chief
    11/29/2006
  • Tiny reactors aim for big role

    Process Intensification (PI) has promised many things but has it fulfilled its promises? When looking at reactor technology, the answer is a definite “Yes.”

    Rocky Costello, R. C. Costello & Associates, Inc.
    11/29/2006
  • Data validation: Jewel in the fieldbus crown?

    Many users and most suppliers to the industry see process availability as the big payout benefit of Foundation Fieldbus (FF) diagnostics — a good portion of it realized through data validation.

    John Rezabek, Contributing Editor
    11/09/2006
  • Avoid trouble with slurries

    Handling slurries (a mix of solids and liquids), should be based on experience and experiments, not theory. Much of the knowledge obtained from pneumatic conveyors and fluidization systems can be used in understanding slurries.

    Thomas R. Blackwood, Healthsite Associates
    11/01/2006
  • Keep measurements on the level

    This article looks at six technologies — mechanical floats and displacers, differential pressure, capacitance, ultrasonic, radar, and guided wave radar — that are used most often for automated control, and provides practical guidance for choosing among them.

    Jerry Boisvert, Siemens Energy & Automation
    11/01/2006
  • Check for human errors

    You may be making an error if you don’t find time to double-check your own and other’s work. Making time to check human work can prevent costly mistakes and save time.

    Trevor A. Kletz, Loughborough University
    10/31/2006
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