Seismic air cannon article link
Posted: Sun Sep 30, 2012 4:43 pm
http://www.saderet.co.uk/Admin/Datashee ... Hi-Res.pdf
Google it.
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Seismic air cannon article link
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Towed Sisemic array
Posted: Sun Sep 30, 2012 11:26 pm
Re: Towed Sisemic array
Posted: Sun Sep 30, 2012 11:36 pm
No mention of air cannons though...Technician1002 wrote:http://www.saderet.co.uk/Admin/Datashee ... Hi-Res.pdf
http://woodshole.er.usgs.gov/operations ... airgun.htm
Turns out its a piston valve
Wikipedia suggests 2,000-3,000 psi
Posted: Mon Oct 01, 2012 11:37 am
Looks like they could do with a bigger pilot valve...
Although, they probably use the pilot as an air spring bumper.
Although, they probably use the pilot as an air spring bumper.
Posted: Mon Oct 01, 2012 11:53 pm
If you look at the way the rear of the piston is shaped and how it fits into the housing there definitely is an air bumper element.
However interestingly it does not appear to be an exhaust valve though, rather the pressure differential is created by the solenoid increasing the pressure on the front side of the piston face, as opposed to reducing the pressure behind it - so it's more of a pop-off valve if you think about it.
However interestingly it does not appear to be an exhaust valve though, rather the pressure differential is created by the solenoid increasing the pressure on the front side of the piston face, as opposed to reducing the pressure behind it - so it's more of a pop-off valve if you think about it.
Posted: Tue Oct 02, 2012 12:15 am
Very true. I completely missed that itty bitty air channel over on the right. It seems the leakage on the sides of the "triggering piston" even dissipate some of the KE through an air dash-pot type mechanism.jackssmirkingrevenge wrote:so it's more of a pop-off valve if you think about it.
Posted: Tue Oct 02, 2012 12:19 am
Now that's pretty cool. Didn't pick up either of those two things mentioned by you two (JSR & ramses) the first time I looked at it.
Posted: Tue Oct 02, 2012 12:33 am
WTF?However interestingly it does not appear to be an exhaust valve though, rather the pressure differential is created by the solenoid increasing the pressure on the front side of the piston face, as opposed to reducing the pressure behind it - so it's more of a pop-off valve if you think about it.
it's just a positive pressure piloted piston valve
Posted: Tue Oct 02, 2012 1:05 am
Isn't that what I said.POLAND_SPUD wrote:it's just a positive pressure piloted piston valve
PLSPosted: Tue Oct 02, 2012 7:50 am
how is that more of a pop-off? it would be more of a pop off valve if it opened at X pressure but it has a control valveso it's more of a pop-off valve if you think about it
comparison fail
Posted: Tue Oct 02, 2012 7:52 am
The flow from the solenoid increases the pressure on the front face of the piston, which causes it to "pop", or rather in this case, "WHOOOOOOMPH!!!".POLAND_SPUD wrote:how is that more of a pop-off? it would be more of a pop off valve if it opened at X pressure but it has a control valve
comparison fail
Ok, it's a Whooooomph-off valve