From Cameron, former BYU student, who is now working at Chevron: "I wanted to give you some feedback on your valve design video. I loved it. I remember struggling a lot with the valve design equation. Having watched the video I feel the students will grasp it better this time around. Well done! Also, to provide some real world relevance to the video, I recently was tasked with verifying some P&IDs within a plant at our refinery here in El Segundo. The overall purpose was to improve documentation, but it was also a huge learning experience for me. My knowledge of valves was definitely lacking, so I spent some time with a more experienced contractor who has worked for decades in refineries and walked through a plant and just picked his brain. If the students can come out of school knowing both what each valve type looks like on the inside but also on the outside, they will be better prepared than I was!" Thanks, Cameron

John, your video simply pops up when I did a search on control valve. It is a great video. Although working in the chemical industry for over 18 years, I am not exactly sure the difference between different control valves. It is great to learn from your video. Thanks!

Excellent, Today I saw your useful video. Thanks for good illustration.

very nicely explained! thanks!

very good explanation!!

So helpful. Thanks

Thanks for sharing

Nice Video

Thank you, I'm working in Flowserve Saudi Arabia.

Awesome

Very excellent videos about valve type selection regarding real life engineering work. Thanks for sharing. Can you have it in a real valve calculation example for a project.

hii, i have a doubt on your step 4 of valve design flow chart, the flow chart says ∆P system variation against flow while emerson's fisher guideline says ∆P valve(drop across valve) , pls clarify

For globe valves It is also important to know the mechanical design of seat and plug to find out if a valve is air to open or air to close.you can not say that a globe valve is air to open/close only by looking to the actuator.

John, great video! I have a question. Why it is important for the installed control valve characteristic to be linear. I understand that it will improve the control performance, but how?

hello and thanks for the video i just want to montiend that you can't just know if the valve is Fail-Open or Fail-close from the actuator only you need to know also if the valve is direct or revers acting

Hii This video is really helpful to understand the valve design. i was wondering if you could explain the complete data sheet components in your next video. And i have two questions. first is, how to define rangebility of a control valve? and second is, most often i see Cv written in a control valve data sheet. Is this Cv related to 100% open condition or what? because Cv changes with the opening of control valve. so i am confused. i hope you understand my problem. Waiting for your reply.

hi all. how can i calculate the pressure drop through the valve?