300psi QEV, Poland, Jack, anyone...........?

[evilvet]

Hi guys

Can you advise based on your experience an eBay or other source for a QEV in 1/4" that will take 300psi ?

My searches turn up a few usual suspects from HK but all state 10kgf/cm2 which I make to be 150psi. This is actually not for a cannon; I am helping a mate with a pneumatic ram but figured you might have a lead.

TIA
(sellers that will post to Oz would be useful )

[jackssmirkingrevenge]

This type (QE-04) should do you nicely at 300: http://www.ebay.com/itm/Pneumatic-QE-04 ... 4607eda7dc

Note however that the output is 5/8".

This type is 3/4" throughout but more expensive: http://www.ebay.co.uk/itm/Pneumatic-3-4 ... 2324c9d6ea

They state low working pressures but the construction can stand up to a lot more, the ones I've seen are really quite well made.

[Zeus]

I bought this one, arrived in 9 days, handles 450psi regularly, can't recommend it enough.

[jackssmirkingrevenge]

I bought this one, arrived in 9 days, handles 450psi regularly, can't recommend it enough.

This one

Same as the second one I linked to but 1/4".

evilvet, what diameter is the ram, and what will it be used for?

[POLAND_SPUD]

can't help now as I am leaving for work soon

might I ask what will it be used for ? if it's for increasing venting speed of a single acting air cylinder (so what these things are normally used for) then 1/2" might be an overkill... well unless the air cylinder is really huge

[archie370]

Why can't you make one that will withstand that amount of pressure ... ?

[Zeus]

Because a homemade valve won't withstand tens of thousands of cycles, whereas that's what a QEV does. And the fella who's getting the valve may not know how to service it.

Thanks for fixing that up JSR.

[archie370]

Mmm that is a good point that didn't even cross my mind ....

[evilvet]

Thanks all, much appreciated.

I don't know much about the application, we were discussing engineering problems over seven or eight glasses of red watching the Melbourne Cup and the question arose on how to get a large volume of air in a very short time.

I suspect it has to do with delivering material into a furnace as that is what my mates main game is, furnace engineering.

Thanks again

[jackssmirkingrevenge]

Even a smaller bore (say 1/4") QEV should be adequate in that case, and better suited to take higher pressures.