Articles

261-280 of 338 < first | | | last >
  • Improve control loop performance

    Specification of control valves doesn’t adequately emphasize the very basic requirement that valve position respond in a timely manner or even at all — leading to process variability.

    Gregory K. McMillan, Emerson Process Management
    10/18/2007
  • Blind Transmitters: A return to the basics

    Analog transmitters easily send process measurements from different areas in a plant to a central PLC where process control decisions can be made based on transmitter feedback. Analog transmitters are great cost-saving alternatives to single-point controllers. In situations where multiple sensing locations are required, single point controllers’ costs can add up quickly.

    10/16/2007
  • Monthly Preview: December 2007

    Here's a look at what will soon be featured on ChemicalProcessing.com. Be sure to check back for the latest articles, news and columns before you see it in print.

    10/02/2007
  • Plug cyber-security gaps

    With the new “high risk chemical facilities” federal anti-terrorism regulations, it’s time for the chemical industry to ratchet up its cyber-security efforts. There’s a surge in interest in cyber-subjects such as security certification, defense-in-depth strategies, risk-based planning and improved policies and procedures.

    Seán Ottewell, contributing editor
    08/31/2007
  • Diagnostics dig deeper

    Today’s plants come ready equipped with their own team of doctors in the shape of the many diagnostic and monitoring systems incorporated into instrumentation and other process equipment. And, like any good doctor, today’s plant diagnostics can look beyond the symptoms of poorly performing instruments and provide insights into the health of the process itself.

    Mike Spear, editor at large
    08/20/2007
  • Biomass fuel production gets sweeter

    Improved instrumentation and control strategies allow biofuel producers to reap the benefits of new processing techniques and advanced control strategies.

    David W. Spitzer, CONTROL Contributor
    07/01/2007
  • Equipment & Services: June

    Chemical Processing's Equipment & Services feature provides a variety of production equipment, supplier services and parts.

    06/07/2007
  • Get ready to comply with new security mandates

    New anti-terrorism standards require the Department of Homeland Security to identify and regulate "high-risk chemical facilities." These facilities will be subject to a security vulnerability assessment. Where does your plant fit in with these new standards?

    David A. Moore and Dorothy Kellogg, AcuTech Consulting Group
    05/29/2007
  • Choose the right fluid for your pressure test

    Compressed gas often makes the most sense for checking a process, according to Senior Editor Dirk Willard, in this month's Field Notes column.

    Dirk Willard, senior editor
    04/12/2007
  • Achieve continuous safety improvement

    Enhancing safety performance requires diligence and unrelenting effort. The Independent Safety Review Panel’s recently released report on the safety culture and practices at BP’s U.S. refineries where a March 2005 explosion occurred in Texas City, Texas indicates similar failings are likely elsewhere in the industry. Learn what can be done to enhance continuous safety improvement.

    Angela Summers, SIS-TECH Solutions
    04/12/2007
  • Compelling reasons to choose an insertion magnetic flow sensor

    Measuring flow rates and volumes of water and chemicals in the water, wastewater and chemical treatment industries requires the latest, simple to use and cost-effective technology that can keep up with the rigorous demands of the various applications.

    03/14/2007
  • Don’t shackle yourself to the wrong platform

    Today, process data are readily available at many levels, from instrumentation to higher-level data historians and OPC servers. Choosing the right platform can be key to successfully implementing robust and maintainable process calculations at your company.

    Dane Overfield, Exele Information Systems
    03/14/2007
  • Pressure tests can spur successful start-up

    Push it: if it breaks it probably needed to be replaced, says Dirk Williard, in this month's Field Notes column. Doing so can help improve your processes.

    Dirk Willard, senior editor
    03/01/2007
  • Take the pressure off pressure control

    Linkage of other variables can stymie hot vapor bypass schemes, according to Andrew Sloley's Plant InSites column.

    Andrew Sloley, contributing editor
    02/19/2007
  • 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
  • pH measurement faces acid test

    Quest for more reliable readings prompts development of tougher and more-intelligent sensors. While pH control often plays a crucial role in processing, achieving reliable readings remains challenging at many sites. After all, pH sensors frequently serve in aggressive chemical environments.

    C. Kenna Amos, 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
  • 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
261-280 of 338 < first | | | last >