How to size and select your next pressure relief valve
WEBNov 4, 2020 · The valve will close when the inlet flange pressure drops to 93-psig (100 – 7). Assuming inlet pressure losses of 3%, the system pressure at closing will be 96-psig (93 + 3). Now, assuming that inlet losses are 10-psig, the valve will close at 103-psig, which is 3-psig higher than the set pressure.
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 ...
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.
Forming the right PID form - Control Global
WEBMay 7, 2020 · Greg: For unmeasured load disturbances on a process input, the proportional-integral-derivative (PID) algorithm has been shown in practice and proven in theory to offer the best performance in terms of minimizing the peak and integrated errors—provided it is well tuned and the correct algorithm Form and Structure are used. However, there are huge disagreements on tuning methods due to egos ...
O-PAS open for business - Control Global
WEBMar 21, 2024 · Plug-and-play products that comply with the Open Process Automation Standard (O-PAS) are turbocharging testbeds and coming to supplier shelves. What’s the goal of an interoperable process control standard? Plug-and-play products, of course—and they’re almost here. Day 1: ASRock, Schneider Electric and …
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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.
Can we control artificial intelligence? - Control Global
WEBJan 27, 2020 · Figure 1: The control envelope for developing artificial intelligence (AI) must protect from the AI doing all it can, and limit its use to doing only what it should. The envelope limits are A: Protect privacy, moral and ethical standards, security; B: Advance R&D, health, energy, transport, etc.; C: Prevent cyber terrorism, misinformation ...
How can self-regulating pressure regulating valves be made to fail ...
WEBDec 13, 2019 · In the case of a self-regulating pressure valve, power failure is the upstream process pressure loss, while signal failure is the impulse line pressure loss (which can also due to upstream process pressure loss or tube burst). With an accumulator (air or hydraulic, depending on your requirements), any valve can be designed to fail closed or ...
Cameron calibration flow lab receives ISO accreditation
WEBSept. 3, 2008. Pittsburgh, Pa. Cameron has received formal NIST certification of accreditation to ISO/IEC 17025/2005 for its hydrocarbon calibration laboratory located in Pittsburgh, Pa. The laboratory is the centerpiece of the Caldon Ultrasonics Technology Center, a $2-million facility designed and constructed specifically to support Cameron s ...
Controllers: Direct vs. reverse-acting control - Control Global
WEBMar 14, 2014 · A: Direct action means that the controller output rises if the measurement increases. Indirect (reverse) action means that the controller output drops when the measurement rises. A: Not quite right. The control valve failure action (and sometimes the valve positioner action) is also relevant.