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Discussion Starter #1
Hello,
What is a poppet valve and what’s the difference
between these two fittings? Thanks.




Pioneer O-Ring Pioneer Male Tipe (Poppet Valve)

Pictured below with the cone with a button on top, tip

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Pioneer O-Ring Pioneer Male Tip

Pictured below with the round top, tip
 

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you see the difference. Sometimes they work well together but most of the time they do not. The female end on the poppet has a small button the poppet pushes in. On my deere they are poppet only. I picked up the ball style and quickly learned my lesson. I have been getting my poppets from Kenny at Bolt on Hooks. He's reasonably priced with excellent service.
 

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The poppet and the ball are designed to be 100% compatible with each other. If I'm not mistaken, the guts inside the female couplers are all the same.

I have both types in use on my 3rd SCV. My hydraulic top-link has the ball coupler and the hydraulic blade has the poppet style. About the only thing that I notice is that when disconnected the tappet style seems to leak a bit less but both styles leak plenty while the implement is stored.

Also, the poppet style is supposed to offer slightly more flow but this would only apply to applications where you are already close to maxing out the flow on a particular sized fitting.

If I have a choice I will go with the poppet but if the ball valve is all that is available I will use those also.
 

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A poppet valve is a specific engineering term used to describe any valve that uses a movable section against a fixed seat to control the flow of a fluid or gas. The best known examples are the intake and exhaust valves in an internal combustion engine.

The two male hydraulic couplers shown are both a kind of poppet valve. The extra tit on the top of one of them doesn't make it any more or less a poppet valve.

Al
 

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Discussion Starter #5 (Edited)
The poppet and the ball are designed to be 100% compatible with each other.
Thanks jgayman ! mille grazie

I just added a new implement that has the old style cone deere male ends.
And I could not get these to snap into my tractor.
So I switched out to the ball style male ends.

I noticed these two styles before. I have a grapple rake with the cone style,
and there have been times when the lines became pressurized by the sun
or whatever, and I couldn't push in the button, even with a hammer. And had to
loosen the fittings with wrenches to relieve the pressure. I kinda wish this thing would
leak a little.

Anyway thanks J, and AlKozak for the engineering fill out information.

Summary:
Both poppets, different styles. Tractor compatible with both.
 

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I noticed these two styles before. I have a grapple rake with the cone style,
and there have been times when the lines became pressurized by the sun
or whatever, and I couldn't push in the button, even with a hammer. And had to
loosen the fittings with wrenches to relieve the pressure. I kinda wish this thing would
leak a little.
What you describe can happen with any hydraulic fitting when there is a big temperature swing. My loader seems to give me the most grief.

What you need is a hydraulic pressure relief tool... (see below). These even let you direct the fluid that escapes into a container for reuse or to keep it off the floor. I have two, one that fits the smaller coupler like used on CUT loaders and the second fits the larger 1/2" coupler typically used on the rear SCVs.

IMG_1264.jpg
 

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A poppet valve is a specific engineering term used to describe any valve that uses a movable section against a fixed seat to control the flow of a fluid or gas. The best known examples are the intake and exhaust valves in an internal combustion engine.

The two male hydraulic couplers shown are both a kind of poppet valve. The extra tit on the top of one of them doesn't make it any more or less a poppet valve.
You are 100% correct. This is one of those situations where someone started calling the tapered couplers "poppet" and the other type "ball" and it just stuck. Anytime someone mentions a "poppet style coupler" we all know exactly what they are talking about.

Here is an interesting tidbit. I went to the Parker website to see if they had official designations for these and believe it or not Parker refers to them as "ball" or "poppet".

poppet.jpg
 

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You are 100% correct. This is one of those situations where someone started calling the tapered couplers "poppet" and the other type "ball" and it just stuck. Anytime someone mentions a "poppet style coupler" we all know exactly what they are talking about.
Thanks for the pointer. I'm in the middle of demonstrating on another thread (which I believe you replied to) that I think I know a lot more about hydraulics than I actually do.

Al
 
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