Pilot-operated relief valve

A pilot-operated relief valve is like a safety switch for big machines that use liquids or gases. Imagine you are playing with a balloon and you keep blowing it up and up until it pops. Now, think of a big machine that uses air or water or gas to do all sorts of important things. Sometimes, too much air or water or gas gets stuck inside the machine and it starts to get too full. Just like the balloon, if there's too much, the machine can break or even explode!

That's where the pilot-operated relief valve comes in. It's like a little helper that sits on top of the machine and watches the air or water or gas inside. If it starts to get too full, the little helper will open a door to let some of it out. That way, the machine won't break or explode. It's kind of like that one friend you have who reminds you to stop when you're about to eat too much candy or stay up too late playing video games.

But, the little helper can't do it all alone. It needs a friend, too. The friend is called the pilot valve. The pilot valve talks to the little helper and tells it when to open the door and let some air or water or gas out. It's like two friends working together to keep the machine safe.

So in summary, a pilot-operated relief valve is like a safety switch for big machines that use liquids or gases. It has a little helper that watches the machine and a friend that tells the little helper when to open the door and let some of the liquid or gas out.