Rangeability of equal percentage control valves - Control Global
WEBSep 12, 2013 · Figure 1: Equal percentage valves are used to provide stable control on heat transfer loops by compensating for the process gain that drops with load by its increasing their gain, so that the loop gain stays constant at around 0.5. Relationship between percentage of valve stroke and percentage of flow. Figure 2: At constant ΔP, the Cv of …
Dos and don'ts of control room design | Control Global
WEBApr 26, 2019 · A control room that has no room for future expansion of people or equipment. Control rooms with poor lighting, leading to employee complaints and higher rates of absenteeism. Noisy, congested control rooms with sub-optimal workflow adjacencies. Delays in design and construction schedules required to address changes.
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WEBControl Global features news and analysis of process control and automation technology to help managers and engineers maintain and optimize systems for today's process industries.
Top 50 Automation Companies of 2021: Green Muscles In
WEBNov. 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 ...
What does good control room design look like? | Control Global
WEBJul 14, 2016 · Likewise, rather than an afterthought, good control room lighting should be as integrated into the design as the placement of the ceiling, walls and floor. Optimum lighting demands quality ambient, uniform illumination, which is a combination of fixtures such as indirect, task and suspended lighting (Figure 4).
The Safety Instrumented Function: An S-Word Worth Knowing
WEBSep 16, 2003 · The term "safety instrumented function" or SIF is becoming common in the world of safety instrumented systems (SISs).It is one of the increasing number of S-words--SIS, SIL, SRS, SLC, etc.--that are coming into our safety system terminology. The definition of a SIF as provided in IEC standard 61511, "Functional safety: Safety Instrumented …
How valve failure modes interact with controller actions and …
WEBDec 9, 2021 · Loop Control Distributed Control PLCs & PACs SCADA Multivariable Control Industrial Computers AI & ML. Manipulate. Motors Valves Actuators Drives. Visualize. HMI Operator Interface Alarm Management Recorders Data Acquisition Mobile Access. Network. Wireless Industrial Networks I/O Systems Power Supplies Remote Access. Manage.
Automatic tank gauging 101 - Control Global
WEBMar 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 …
The benefits and challenges of cascade control
WEBMay 24, 2023 · The benefits and challenges of cascade control. May 24, 2023. Cascade control can be understood best by using values and units of process variables. R. Russell Rhinehart. There are several techniques that enhance PID, termed advanced regulatory control. These were developed in the 1930s-40s and include reset feedback to prevent …
About Us - Control Media Brand - Control Global
WEBAbout 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 ...