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  • 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
  • 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
  • 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
  • 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
  • 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
  • Choosing motor controls and drives

    In any industrial control application, using the right drives and motor controls can make or break the project, and also can make a huge difference in how well those applications perform.

  • How to select control valves, Part 2

    When it comes to selecting and sizing control valves and positioners, this article not only helps you pick the right one for the right job, but also includes a valuable valve selection chart you can download!

    Béla Lipták, PE, CONTROL Columnist
  • Welcome to the Bus Wars, Part Tres

    You may not be aware, but a new bus war is being waged in your plant — the battle of the motion networks. Control Global's Senior Tech Editor Dan Hebert, PE, provides analysis and commentary on the newest battle over fieldbus.

    Dan Hebert, PE, Senior Technical Editor
  • Raising the bar for control system security

    Security researchers at Wurldtech Analytics are partnering with ISA to establish procedures and an operations model for the security testing and certification of products used for control.

    Eric and Joann Byres, principals, Wurldtech Analytics
  • Washington targets plant security

    Federal actions undoubtedly will markedly impact the chemical industry. Nevertheless, we don’t know at this point whether federal chemical security legislation will happen in 2006.

    David A. Moore and Dorothy Kellogg, AcuTech Consulting Group
  • Security poses an inherent industry dilemma

    Industry faces the threat of draconian demands from Congress as chemical plants remain an attractive targets for terrorism attacks, according to Mark Rosenzweig, editor in chief of Chemical Processing.

    Mark Rosenzweig, editor in chief
  • Boiling water is easy as one, two, three, four

    There’s more to boiler level control than measuring level and adjusting a feedwater valve. Improved measurements and inverse response are just a few of the influences on operating boilers in a reliable manner.

    David W. Spitzer
  • Heat integration steps can present control problems

    The more energy prices rise, the more heat integration saves. However, heat integration steps can present complex control problems. Slip-ups in putting control systems in place can make operations nearly impossible. That certainly was the case at one unit using heat recovery.

    Andrew Sloley, contributing editor and Carolyn K. Hawley, VECO USA
  • Fieldbus improves control system reliability

    Profibus-PA and Foundation Fieldbus both reduce cabling cost by sharing wiring among several field instruments. They also save money by reducing the number of instrument interface cards required to connect field instruments to the control system. However, they all save money by being able to use the same field transmitter for a wide range of measured variables.

    Dick Caro
  • The rise and fall of modulation

    Why have reciprocating designs fallen out of favor relative to the rotary compressor that is so predominant today? Read about the evolution of efficient controls for compressed air systems.

    Henry Kemp
  • HMIs evolve in process control

    New HMI technology is putting a whole new (inter)face on how operators view control systems information, while at the same time driving human error out of systems and improving safe work practices.

    Ian Nimmo, president, User Centered Design Services LLC
  • Innovations in batching, dosing and weighing

    Challenges brought on by new regulations and technical problems for batching, dosing and weighing have pushed users to find some innovative and surprising solutions beyond our own industry.

  • How to select control valves, Part 1

    When it comes to selecting and sizing control valves, the non-commercial chart in this article not only helps you pick the right one for the job, but also serves as a reference tool you can download.

    Béla Lipták, PE, CONTROL Columnist
  • Try before you buy

    There is another side to toll processing. It involves the companies that arguably have the best possible know-how and hardware — for the simple reason that they are the equipment manufacturers themselves, offering toll processing services that utilize their own products.

    Mike Spear, editor at large
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