Articles

201-220 of 276 < first | | | last >
  • Sample pump eliminates emissions

    A compact system significantly improves analyzer accuracy. This innovative turnkey solution for analyzer emissions is a solid-state pump with an ultra-sensitive pressure regulator that mixes a compatible gas with the analyzer samples to achieve a constant vent header pressure — even during times of plant upset.

    Kazi Hassa, Parker Hannifin
    03/20/2007
  • How hydraulic modeling can improve the efficiency of your pump systems

    In spite of their large operating cost, most pump systems are inefficient by design. Among the common design problems are non-optimal pipe sizing, control valve utilization and, perhaps most common, incorrectly sized pumps. How a pump operates depends on the system, so improvements must focus on the system as a whole.

    Tom Glassen
    02/20/2007
  • Flowmeters clean and dirty

    ControlGlobal.com contributor David W. Spitzer provides a look from a process automation perspective at how magmeters and Venturi meters are vying with ultrasonics for clean and dirty water applications.

    David W. Spitzer
    11/09/2006
  • Consider changing the speed not the pump

    Chemical Processing's Contributing Editor Andrew Sloley advises that instead of reflexively resorting to brute force to provide enough head, adjusting the pump speed might make for a better solution.

    Andrew Sloley, contributing editor
    11/01/2006
  • 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
  • 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.

    10/18/2006
  • 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
    10/17/2006
  • The FRETT approach to pump problems

    Some U.S. oil refineries repair their centrifugal pumps every three years while other refineries enjoy an average repair interval of 10 years. Learn about the highest-performing refineries and other petrochemical companies that have significantly reduced pump failures, and how you can obtain the same results.

    Heinz P. Bloch, P.E.
    10/16/2006
  • Increase pump performance

    In this web exclusive on ChemicalProcessing.com, pump expert Ross Mackay says a key to a pump's performance is to look at the control system it's running with.

    Ross Mackay
    09/18/2006
  • Pump Performance: Kayo Cavitation

    Checking pump performance curves is one of the first steps in troubleshooting a centrifugal pump problem or seeing if a pump can handle new service conditions. Learn to look for more than just insufficient NPSHA, the common culprit, when investigating cavitation.

    Andrew Sloley, contributing editor
    07/17/2006
  • Keep a steady eye on measurements

    While engineers often strive to keep processes running without too much variation, measurements that don’t change may be a cause for concern not celebration, as one refinery can attest.

    Andrew Sloley, contributing editor
    06/19/2006
  • Pumping Temperature Considerations

    "Bad actor" pumps are those pumps that have trouble with frequent and repetitive failures. In many cases, the source of the problem is an ANSI pump trying valiantly to handle a liquid well beyond the range of its design rating.of 300 degs. F.

    Ross Mackay
    06/19/2006
  • Mind Mixer Mechanical Design

    While most mixers can provide a long service life — for instance, some are still operating after more than 30 years — mechanical problems can shorten life or even break parts. In this article, learn about all the mechanical problems that may befall your mixing equipment.

    David S. Dickey, MixTech, Inc.
    04/18/2006
  • Find the real cause of pump gas up

    Simply blaming high feed temperature for inadequate suction isn’t enough when diagnosing pump problems. Read this article to get a laundry list of causes for pump gas up.

    Andrew Sloley, contributing editor
    04/17/2006
  • Pump Start-Ups

    There are only three things we need to do to start a pump.

    Ross Mackay
    01/09/2006
  • Pumps benefit from a vane effort

    Widely used but underappreciated, back pump-out vanes extend bearings and seal life.

    Richard Nardone, ITT Industrial & BioPharm Group
    11/15/2005
  • pH linearization lubricates waste control

    Learn how a simplified technique for linearizing pH can enhance control in waste treatment applications and eliminate the need for gain-adjusting techniques.

    11/15/2005
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