Uploaded December 2025 | Updated September 2026, 2 weeks ago

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VBV (variable bleed valve) is an important mechanism used by turbo-fan engines to control compressor airflow, it is also here to prevent engine surge. It can be used to release excess pressure when there are no other options for removing pressure from space in between compressors.
This and how to replace one of the valves you will see in this video.



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how to replace VBV: youtu.be/hLR_PEY5QbU


———-Video content———————

00:00 - Intro
00:40 - removal of the shafts
02:15 - inspection of the shafts
04:15 - inspection of the VBV (Variable Bleed Valves)
08:03 - master valve and shaft
09:48 - lubrication
10:29 - adjustment of VBVs
16:11 - test
19:11 - Acceleration test
22:12 - return to stand and Close-up

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