PolyU HK

PolyU OER Portal

PolyU Library

PolyU OER Portal

Search OER Collection

ALL

PolyU OER

Internet Resource

Results for: Creator / Instructor Hillhouse, Grady Keywords Relief valves

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

Privacy Statement Contact Us Web Accessibility Pao Yue-kong Library, The Hong Kong Polytechnic University. All Rights Reserved.