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Video

How to Collapse a Pipe by Closing a Valve

Water hammer can work in both directions, and I only discussed one of those in the previous video (https://youtu.be/xoLmVFAFjn4). This episode revisits that demonstration to show how water hammer can form a vacuum pressure in a pipe. Momentum carrying fluid away from a valve wants to keep going even after the valve is closed. This generates a negative pressure than can cause major damage!

Subjects:

Building Services Engineering

Keywords:

Valves Water hammer Hydraulic control Hydraulic transients Relief valves Fluid mechanics

Resource Type:

Video

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