Poppet Valve

We just learned about the Ball Valve.

Another type of valve is the Poppet Valve.

This is a valve that is usually used to open and close for gas to come through.

In a car's engine there are valves used to help the fuel come in, and after it makes a big explosion there are valves to let the burnt up air out.



(from: wikipedia - poppet valve)


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Ball Valve

We just learned about the Valve Trim.

There are a lot of different kinds of valves.
One type of valve that is used a lot is the Ball Valve.

It's called a ball valve because inside the valve there is a ball.
The ball has a hole in the middle of it, and the valve handle turns the ball.
When the ball is turned one way, the water or gas can go through the hole in the ball.
When the ball is turned the other way, the ball blocks the water or gas, and keeps the valve closed.



(from: wikipedia - ball valve)


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Valve Trim

We just learned about the Valve Spring.

Another part of the valve is the Valve Trim.

The valve stem, seat, disc and any parts that are inside the valve are all together called the Valve Trim.


(from: wikipedia - valve)


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Valve Spring

We just learned about the Gasket that helps keep a valve from leaking.

Another part of a valve is the Valve Spring.

Some valves use a spring to keep a valve closed, but if there is a lot of pressure they will squeeze and let the disc open and let some pressure out.
Once enough pressure is let out, the spring will push the disc closed again.


(from: wikipedia - relief valve)


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Gasket

We just learned about the Valve Stem that sticks up from the valve.

Another part of a valve is the Gasket.

This is a small circle that goes inside any place where two pieces of a valve have to be connected.
So at the top where the bonnet goes is sometimes a gasket, and then where the ports connect to other pipes is sometimes a gasket.

It's a way to help make sure that the liquid or gas doesn't leak out through where the two parts are connected.

Sometimes they're made out of rubber, but other times they're made out of paper or even metal.


(from: wikipedia - gasket)


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Valve Stem

We just learned about the Valve Seat.

Another part of a valve is the Valve Stem.

This is the part that sticks up out of the valve, and is used to help open and close the valve disc which lets gas or water go or stop.

There is a valve stem on a bicycle tire that sticks out.
If you hook a pump up to the valve stem, it will push in a pin which will allow air to go in or come out.


(from: wikipedia - valve stem)


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Valve Seat

We just learned about the Valve Disc.

Another part of a valve is the Valve Seat.

We know that the holes where the water or gas come in are the ports, and that the part of the valve that closes those holes is the disc.
The part of the valve that touches the disc and makes it a tight seal so nothing can get through is called the seat.


(from: wikipedia - valve)


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Valve Disc

We just learned about the Valve Handle.

Another part of the valve is the Valve Disc.

Inside the valve body is the part that moves to open or close to control the water or gas coming through.

There are a lot of different types of discs, that move in different ways to open up and close.


(from: wikipedia - valve)


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Valve Handle

We just learned about the Valve Port.

Another part of a valve is the Valve Handle.

To open or close a valve, you can turn the handle one way or another.
This is just like the faucet that you use on a sink or a water valve outside the house.

There are a lot of types of valve handles.
The one on the faucet outside the house is usually a wheel handle that spins around.
The handle on the sink faucet is usually some kind of lever handle.
The handle underneath the sink that connects to the water line is usually a T shaped handle.

Some valves don't have handles because they are automatically opened by some other type of machine.


(from: wikipedia - valve)


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Valve Port

We just learned about the valve Bonnet.

Another part of a valve is the Valve Port.

This is the part of the valve that lets water or gas in or out.
They can have as little as just two ports, but many valves have more.
Some valves even have up to 20 ports!

Simple two port valves are just open or closed.
Other valves with a lot of ports might have a few open and others closed depending on how it is set up.


(from: wikipedia - valve)


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Bonnet

We just learned about the Valve Body.

Another part of a valve is the Bonnet.

This is on top of the valve body, covering up the inside of it.
The bonnet can be taken off the top to open up the valve and fix it.


(from: wikipedia - valve)


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Valve Body

We just learned about the Valve.

There are a lot of parts to a valve that make it work.
Most of the parts of the valve inside of it that you can't see are all together called the Valve Body.

Inside the valve body are the parts of the valve that open and close to let gas or liquid through.


(from: wikipedia - valve)


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Valve

We just learned about the Cam.

Another part of moving things like machines is a Valve.

This is something that opens and closes to let air or water in or out.
We use valves every day, like when we turn on the water to wash hands.

Turning the water on opens the valve, and you can usually open it a little or a lot.
Then turning the water off closes the valve.


(from: wikipedia - valve)


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