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How to size and select your next pressure relief valve
Nov 4, 2020 · Ghulam Farooq. A pressure relief valve (PRV) is a safety device designed to protect a pressurized vessel or system in case of an overpressure event. An overpressure event refers to any condition that would cause pressure in a vessel or system to increase beyond the specified design pressure or maximum allowable working pressure (MAWP).
Top 50 Automation Companies of 2021: Green Muscles In
Nov. 8, 2022. The Top 50 global and North American automation suppliers fend off recession with sustainability and digitalization. Larry O'Brien, Chantal Polsonetti, Mike Guilfoyle. The automation marketplace proved its resilience again in 2021 and returned to pre-pandemic levels. Despite advances in project engineering that reduced cycle times ...
Understanding switch configurations - Control Global
Nov 25, 2019 · A: NO and NC are the fundamental blocks of understanding any logic, be it soft or hardware. Normal condition is defined as energized condition and when plant/equipment/machine is running in normal condition, logic is true. NC means normally-closed contact. NO means normally-open contact.
Automatic tank gauging 101 - Control Global
Mar 15, 2021 · Automatic tank gauging 101. March 15, 2021. From measurement accuracy to lifecycle costs, the key considerations to keep top of mind. Keith Larson. The purpose of tank gauging is to measure the contents of tanks and vessels for inventory control and custody transfer. Most process plants have tanks that hold feedstock or finished products, and ...
About Us - Control Media Brand - Control Global
About Us. In both print and online, Control serves the classically defined process industries—chemicals, oil and gas, food, paper, plastics, metals and textiles—as well as power generation and water/wastewater treatment utilities. Our mission is to serve the information needs of engineering, operations and management personnel whose job it ...
How valve failure modes interact with controller actions and …
Dec 9, 2021 · The controller action is selected for the total loop (Figure 1) to always have negative feedback (RA). Each RA (180° phase shift) in the loop causes a sign reversal, while each DA results in no phase shift. In terms of the total loop, this means that if both the valve and the process are DA (phase shift = 0) or if both are RA (phase shift -180 ...
A straightforward explanation of feedforward control
Jun 9, 2020 · Greg: The use of feedforward control is often a missed opportunity because of the misinformation in the literature and the lack of guidance on implementation. Here we get a straightforward understanding and approach to feedforward control from Peter Morgan, who as leader of the ISA 5.9 Standards and Practices (S&P) working group for PID algorithms is responsible for generating a technical ...
Top 50 Automation Companies of 2020: Rising to recover
Oct 27, 2021 · Coming out of the COVID-19 recession. The worldwide and North American automation markets almost universally declined in 2020 due to COVID-19. By April 2020, more than 80% of flights were restricted, cargo capacity was down, airlines and rental car companies reduced their fleets, and West Texas Intermediate Crude hit less than $37 per barrel.
The benefits and challenges of cascade control
May 24, 2023 · This situation represents the first of two reasons to consider cascade. From a process view, the controller influence on the temperature is the steam flow rate. The controller changes steam flow rate through the valve. But some other influences can also affect the steam flow rate, so control it.