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ISA Strengthens its Position as a Leader in Industrial Automation and Control Systems Cybersecurity

Results of a recent survey by the Pew Research Center, canvassing more than 1,600 leading experts on the Internet and computer systems and networks, predicted that a major industrial cyberattack will occur sometime within the next 10 years that will cause widespread harm to America’s security and welfare. “Widespread harm” was defined as significant loss […]

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Control System Migration is a Major Learning Opportunity

Given the large number of legacy process plant control systems needing an upgrade in coming years, there is much discussion as to how, when, and why a given company should follow one strategy or another for modernizing or replacing a major process control system or distributed control system (DCS). However, in all that discussion, there […]

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AutoQuiz20150612

AutoQuiz: What is the Process of Grinding the Plug and Seat of a Valve Called?

Today’s automation industry quiz question comes from the ISA Certified Control Systems Technician (CCST) program. Certified Control System Technicians calibrate, document, troubleshoot, and repair/replace instrumentation for systems that measure and control level, temperature, pressure, flow, and other process variables. For information about the CCST program, CLICK THIS LINK. Control Valve Course Update: There are three […]

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AutoQuiz20150605-3

AutoQuiz: Can You Match Valve Symbol Designations?

Today’s automation industry quiz question comes from ISA’s new course, Control Valve Mechanics and Operations from Analog to Digital. The class, which is offered June 22-26, takes a deep dive into the control valve’s mechanical composition, actuation and positioning accessories, including a detailed study of digital valve controllers. The class is hands-on and lab intensive, and is […]

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Best Location to Calibrate Instruments: Field or Workshop?

In today’s process industry, instruments are often calibrated in the field. Portable calibration solutions are used, but it can be more convenient and effective to do calibration in a workshop. Selecting between field and workshop calibration is not a black-and-white situation. These two methods are not exclusive alternatives; instead, they complement each other. Let’s discuss […]

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Sectional view of a variable resistance diffuser (a control valve would have been attached to the smaller flange). Valve upstream pressure moves the piston against a spring force and the downstream pressure of the fluid emanating from the control valve. Thus, the combination spring plus control valve downstream pressure less the upstream pressure defines the low pressure drop across the conventional control valve. The balance of the upstream pressure is reduced by the perforated passages. Note, all holes move in unison, hence the short travel.

What are the New Innovations in Control Valve Technology?

After the hectic activity of the 1980s and 1990s, especially on the international level through the International Electrotechnical Commission (IEC), efforts to either refine or create new standards have slowed considerably. Past activities led to a spate of standards yielding more accurate sizing, due to a better understanding of fluid dynamics, as related to valves, […]

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failsafe points

AutoQuiz: What are the Failsafe Positions for a Valve?

Today’s automation industry quiz question comes from ISA’s new course, Control Valve Mechanics and Operations from Analog to Digital. The class, which is offered June 22-26, takes a deep dive into the control valve’s mechanical composition, actuation and positioning accessories, including a detailed study of digital valve controllers. The class is hands-on and lab intensive, and is […]

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Simple Strategies for Maximizing Biopharmaceutical Product Quality

Bioreactor batches can take days or weeks to complete. Each batch may be worth millions of dollars. Preventing bad batches and achieving repeatable high quality product is critical. The use of key PID features, tuning objectives and feedforward control can meet the stringent requirements for biopharmaceutical production. Interaction between DO and pH control can be […]

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