Piston Valves Explained Visually

[octane89]

Can someone answer this for me-
Is it possibly to have too much pilot volume? I have a 3" Tee, and the pilot volume is about the size of a 3" cap.

[Pete Zaria]

Can someone answer this for me-
Is it possibly to have too much pilot volume? I have a 3" Tee, and the pilot volume is about the size of a 3" cap.

Yes, too much pilot volume is a common problem. A larger pilot valve does help, though it's best to try to reduce this volume somehow, either by re-designing the valve or filling the volume with something (foam anyone?).

A picture would be helpful...

Peace,
Pete Zaria.

[octane89]

I'll have a pic soon and better explanation, but It's a new type of sealing piston Im working on, and where the piston slides back is the pilot volume (obviously), but I don't want to restrict the flow by not having it open enough.

[octane89]

Here's a pic to help get an idea of what Im doing.

[jackssmirkingrevenge]

Yes, too much pilot volume is a common problem. A larger pilot valve does help, though it's best to try to reduce this volume somehow, either by re-designing the valve or filling the volume with something (foam anyone?).

words of reason, music to my ears

Octane, the disc that seals with the barrel needs to be the same diameter as your rear disc otherwise it won't be stable and won't work.

[octane89]

Thats something I figured when I started to make the seals. But I have that part figured I believe. I was just gonna make it the same size, but cut away some of the unnessecary sections to allow it to "flow" back easier.

[jackssmirkingrevenge]

Apologies for the sh!te paintshop, but you mean like in the attachment? that would work well.

[octane89]

Yea, essentially the same unless I cut it differently.

[wangpushups]

This helped me out a lot, thanks.

[f.c]

the coaxial design doesn't seem to be showing up just my luck considering i needed it.

[Hawkeye]

Too bad that's the only coaxial diagram on here.

[MrCrowley]

the coaxial design doesn't seem to be showing up just my luck considering i needed it.

The co-axial animation is working for me, your talking about the one on the front page right?

[clide]

the coaxial design doesn't seem to be showing up just my luck considering i needed it.

Not sure why it wouldn't be working, Try <a href="http://gbcannon.com/flash/coax.swf">this link</a>

Also the theory behind all of them is the same, so using another one would probably still let you learn the concept.

[f.c]

thank you. its great to see a forum where people actually help each other out spudfiles get a 10/10 in my opinion.

[anthony5640]

how do i make a piston?