retpo
Senior Diver
Posts: 63
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Post by retpo on Mar 17, 2016 17:59:13 GMT -8
Darn GPS, must of missed a couple turns :-)
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Post by diverdon on Mar 17, 2016 18:55:31 GMT -8
More sand I checked the IP (video to follow) big swing. From 130+ to 100 on a tank with 2500 psi. So I opened up the firsr stage and of course, I found sand, everywhere! But I also found nice Shiney chrome. Perhaps the problems (odd hestition upon purging reg) lie in the first stage. I'll order a kit from VDH and some shims and see where that leads me. Of course, I have another chrome reg on the way so that may help rule out things when I switch first and second stages. The fun continues... DD
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Post by nikeajax on Mar 17, 2016 19:02:33 GMT -8
Well wha'dja think we were gunna doo with it...I guess this is now yer cat-box reg JB
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Post by diverdon on Mar 17, 2016 19:07:30 GMT -8
As you (hopefully) can see in the video within the IP swings a lot. From almost 140 down to around 100 with a noticeable jump at 100. I tried it several times and each time the was the hesitation at the beginning and the jump when it got down to 100. The seat appeared scored but I did not see sand in the piston chamber. The seat looked concave. More details will follow. DD
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Post by nikeajax on Mar 17, 2016 21:46:31 GMT -8
Yeah, I'll say that seat is fried... Yummm, yummmy, I just love IP-creep. Dang, that was an insane amount of sand in it, can't help but wonder if someone found it in the surf...
JB
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Post by SeaRat on Mar 17, 2016 22:43:27 GMT -8
You should find less IP change after you clean the sand out of the first stage, and probably a reduction in that delayed air flow you noted on the first page. This is because the first stage was having to overcome friction with the sand, and probably a dried out O-ring, in order to flow air. You may also have a plugged sintered filter, which will also influence the IP drop.
John
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Post by nikeajax on Mar 18, 2016 12:11:49 GMT -8
DD, doesn't it have an over pressure valve: it should have popped, unless that's all FUBAR too. If it doesn't have one, get one, as this is exactly what they're for: tilt-valves need them... if too much pressure builds up behind them, you can't bleed off the pressure. Depending on the tank pressure, we'll say 2500, what ever is in your tank, will be the pressure applied to holding that tilt-valve shut, an' not even you my muscly friend, will be able to get that valve to open... JB
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Post by diverdon on Mar 18, 2016 14:02:45 GMT -8
There was not one on the reg. I should have the other one soon for comparison. I could use one from one of my HWs I guess.
Thanks JB,
DD
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Post by nikeajax on Mar 18, 2016 14:20:52 GMT -8
MMMmmmmm, technically, yes, but you'll have to readjust it. The HW's are set for a really low IP, like 95-100 PSIG, and I'm not sure when their valves pop. Hmmmm, I'd say yes, go ahead and put it on for the time being.
I could be wrong about it needing one, but I've never seen a tilt-valve not have one either...
So you ordered some shims, is that to boost yer IP? My Scubair-II has them and that brings the IP to 135...
JB
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Post by SeaRat on Mar 18, 2016 16:27:34 GMT -8
Jaybird and Don,
I'm not sure that this regulator needs the ORV. If you are worried about it, put an octopus regulator on it, as that will do the same thing (as long as the octopus is a downstream valve). I'd have to see a diagram of how this regulator works, but if it has a ball-design with a tilt valve activating the ball, then it may be a downstream design. Since it did not come with the overpressure relief valve, I assume this is the case. But I cannot be sure.
My Scubapro Pilot, which is a pilot valve design, is a downstream design and doesn't need an overpressure relief valve.
Jaybird, it is not the seat on a tilt valve that ruptures, as that is rubber and metal and will not rupture. It is the LP hose that is at risk, and an explosion of the hose would be catastrophic on a tilt valve regulator. The hose itself could injure the diver.
John
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Post by nikeajax on Mar 18, 2016 16:44:02 GMT -8
John, yes, you're right! What I was trying to say is that with too much pressure tilt-valves will lock up, then you ge'cher... Whooooo-hooo!if there isn't something/way to bleed them off. I've been writing so much my brain is kinda fried... I sometimes leave things out! JB
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Post by SeaRat on Mar 18, 2016 17:12:17 GMT -8
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Post by nikeajax on Mar 18, 2016 17:38:24 GMT -8
I could be wrong about it needing one, but I've never seen a tilt-valve not have one either... Groovy, I don't mind being wrong; it's just something else I've learned today JB
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Post by SeaRat on Mar 18, 2016 17:40:38 GMT -8
I also found this diagram of the Tekna 2100 pilot second stage: Don, note the two O-rings in the poppet/pilot chamber on the second stage. These probably need lubrication. John
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Post by nikeajax on Mar 18, 2016 18:11:27 GMT -8
Don, note the two O-rings in the poppet/pilot chamber on the second stage. These probably need lubrication. So long as it doesn't require disassembly of the valve: I remember Charlie saying to NEVER take one of them apart, and that they should just be replaced if need be... JB
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