Okay kiddo, imagine you have a toy car with a button on it that makes it stop driving. Now imagine you have a big pipe filled with gas or oil that needs to be stopped in case something goes wrong. That's where a safety shutoff valve comes in! It's like a big, important button for the pipeline.
The valve is usually located somewhere along the pipeline and can be controlled by people who are watching over it. If they see anything strange, like a leak or an explosion, they can quickly press the button and the valve will immediately shut off the flow of gas or oil inside the pipeline. This stops the danger of the gas or oil leaking out, which could cause a fire or explosion.
So, just like your toy car's button stops it from moving, the safety shutoff valve stops the gas or oil in a pipeline from moving. It helps keep everyone safe by making sure the energy inside the pipeline stays put if anything goes wrong.