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Direct Acting and Reverse Acting for Control Valves & Positioners

"What is direct acting and reverse acting? All these terms will be explained in detail in this clip. How do we identify whether the actuator and valve body is reverse acting or direct acting? Again, all these methods will be covered in the video. The Air-to-Open control valve is where the valve body seat is closed when the instrument air is supplied to the actuator while the Air-to-Close control valve is where the valve body seat is opened when the instrument air is supplied to the actuator. Occasionally, you mean heard the terms such as Air-to-Retract or Failed Close instead of Air-to-Open control valve. Sometimes, the terms of Air-to-Extend or Failed Open are used instead of Air-to-Open control valve." This channel shares a series of hands-on, simulated as well as conceptual knowledge videos about Instrumentation calibration and troubleshooting based on my actual working experience as an ordinary technician. The approach taken mimics the real life experience that occurs in factory setting. I really wish my humble and little unknown videos will at least help those who wish to learn about process instruments. Please kindly help to click "Like" and "Subscribe" buttons to support my effort as the task of making videos are tedious and time consuming. I would like to take this opportunity to sincerely thank everyone for supporting my effort. "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Fluke Digital 789 Multimeter : https://bit.ly/3Qp2Waf Disclaimer: This video description contains affiliate links, which means that if you click on one of the product links, I may receive a small commission. This helps support the channel and allows me to continue creating videos like this. Please note that the product price remains the same whether you purchase it directly from the owner or purchase it via my link shown above. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ " #Instrumentation #Electrical&Instrument #Calibration #CalibrationTechnician #InstrumentTechnician #InstrumentCalTech