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Hi. Today on Repairs101 Iím going to do a little something about valves.
So now this was actually a really difficult video to shoot because the more I thought
about valves the more I realized ñ itís really quite amazing ñ theyíre everywhere.
Plus the more I thought about all the different kinds of valves.
These are valves. Thereís a valve in there. Those are valves. Hereís a valve. [Flushes]
Thatís a valve. Hereís three valves that are all essentially the same the only thing
different is the plastic cap. Thereís another valve right here.
So this little object is an adapter for my high pressure compression tester. Now the
reason Iím showing you this, in this particular case is to show you the valve in the end of
it. This funny looking, seemingly broken screwdriver ñ you might think that you have a broken
screwdriver on your hands if you have one of these but in fact itís a Schrader valve
remover. It just goes in there like that, and then itís threaded so it just spins right
on out. OK so thatís what a Schrader valve looks like. Pretty cool, eh? Now if you think
you recognize the Schrader valve ñ and if you think it looks familiar ñ youíre right.
[Hisses] Hereís some valves out of an engine. And
this one has still got the valve guide on it.
Now this monster here this is a thermostat for very large diesel engines and just like
the little tiny Schrader valve itís dropped into a pipe or a passageway and it blocks
it and then when itís activated by this wax slug in the back here the gap opens here and
the fluid is able to wash in past it. Now a ball valve is exactly that, itís a
valve that operates by turning a ball inside of a passageway. As you can see, thereís
a ball valve right there. So thatís what a ball valve looks like.
OK so hereís a regulator and it is a ball valve. And here it comes around the other
side, there we go. So thatís a ball valve. So now this oneís called a ìpet-***î.
This is the kind of thing youíll find as a drain on the bottom of your carís radiator.
Pardon the pun but your garden variety garden tap. Itís a classic stem valve. Itís a classic
stem valve it has a flat bushing rather than the domed one you might have seen in my other
video. OK so hereís a half inch gate valve. And
the gate valveís pretty good. Iíll justÖ OK so here we have another kind of gate valve.
Check it out on this one the gate swings from side to side.
Thereís another small one: there itís another small gate valve. Close the gate, open the
gate again. And yet another kind of gate valve, as you
can see on this one the gateís swung open. See up in the top corner here the gate is
swung down and open, to let the floodgate open.
This little babyís a three quarter inch check valve. And a check valve is a one way passage.
You can see thereís a flapper valve inside so fluid can flow through ñ in the direction
of the arrow very easily ñ but canít flow in the other direction. Thereís your flapper
right there. This is a grease needle with a grease ***
on the end. You see there is a check valve installed in the end of the grease ***.
Itís just a ball bearing with a tiny little spring behind it. Poke it and release it and
there should be a little grease come out of it. There, you see that? I got a little grease
out of it. So thereís another kind of check valve, the ball bearing check valve.
Iím not going to open it because I want to be able to identify it and identify its part
number. There you go another ball bearing check valve. The hose would slip on here and
youíd have it attached to your fuel can and when you disconnect it of course you donít
want the fuel coming out. The spring will push the ball bearing and make a seal on the
end. Itís also a check valve and itís called
a Joker valve. And whatís really interesting about it is ñ aside from the fact that itís
made out of rubber and just has sort of an elastic memory that allows material to pass
through this way but of course resists passage of material through this way ñ and whatís
interesting about it of course is that itís very, very similar in design to the Tricuspid,
Aortic and Pulmonary valves. Tricuspid ñ this is a tricuspid: three points ñ Aortic
and Pulmonary valves in your heart. They are essentially the same kind of design. Except
instead of hard rubber with an elastic memory your heart valves of course are made of dynamic
living tissue.