Sleeve valve

Okay, kiddo, so a sleeve valve is something that helps control how liquids or gases move through pipes.

Imagine you have a long straw and you want to drink your milkshake through it. You put your mouth on one end and suck, right? Well, that's like how a sleeve valve works, kind of.

In a sleeve valve, instead of sucking with your mouth, there's a special part called a sleeve that slides up and down a bit inside the pipe. When the sleeve moves up, it lets liquid or gas flow through the pipe. When it moves down, it stops or slows down that flow.

The sleeve is kind of like a puppet on strings, but the "strings" are actually metal columns that go up and down and move the sleeve. It's all controlled by a special handle, sort of like the gear shift in a car.

So why might we need a sleeve valve? Well, for example, if we want to control the flow of oil or water in a big factory, we might use sleeve valves to make sure nothing gets clogged or flooded. It's a very clever way to control how liquids and gases move around.