BFE: Double Block and Bleed Valve Assembly

[@pattarakarn-ar-pakorn9954]

Excellence presentation and easy to understand of DBB working.

[@neerramesh]

Good job...👍
very simple to understand the function of DBB valve.

[@bonneyforge7519]

Thank you! Glad you enjoyed it.

[@pranavmore27]

Great explanation! Keep the good work going!

[@bonneyforge7519]

Thanks a lot!