qev valve piston valve same thing?

[mach10]

what is the differences between a qev and a piston valve? Sory if this is a stupid question
ps what's a easy test qev?

[jeepkahn]

Not a stupid question, but they are basically the same...

[mach10]

Thanks jeepkahn people kept talking about qev guns and din't know a qev was.

[Brian the brain]

Mach 10...There is a button n the top of your screen called wiki.

You will find all the answers you ever need in there.
Not to be a donkey:
A Quick Exhaust Valve is a factory made, superfast piston valve, but with less flow than most homemade piston valves.
It's really easy to use.


I understand you are new here, but we can;t have all the new guys ask the same questions over and over.


So...read up and get ready to learn...

[POLAND_SPUD]

but with less flow than most homemade piston valves.

he meant that the biggest QEVs are 1" while while the size of a homemade piston valve is limited only by your imagination (and access to tools and materails to build it)

...uhmm I just thought you might get it wrong.. sorry if it's obvious

[Brian the brain]

No that's not what I meant.
A piston valve generally has the out-port further forward, so the air doesn't have to travel around a corner to get out.

Plus the piston travel of a QEV is minimal.

[POLAND_SPUD]

well what ever...
QEVs that have all that much dead space than a piston valve to be take this factor into consideration.. plus they are simply better made

[jonnyboy]

They are the same, a qev is just a manufactured piston valve.

[POLAND_SPUD]

well not quite... they are of much higher quality than an average piston valve

[sgort87]

Wait wait wait now. There are a lot of models designed with a diaphragm instead of a piston, which work less effectively. These are normally the smaller models and about any QEV made by Asco.