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Post by nikeajax on Mar 2, 2019 10:27:14 GMT -8
Bravo Phil: I was hoping you'd have something to say JB
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Post by snark3 on Mar 2, 2019 16:47:12 GMT -8
Phil- Thanks for the input. The OPV is not even installed, I'm using the adapter I made and the gauge setup I made. My gauge setup does have an OPV built in. IP is only about 30. I'm using the original rubber and phenolic gaskets. My understanding is that these aren't for sealing just spacing and to keep the spring holder from damaging the diaphragm when its tightened
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Post by snark3 on Mar 2, 2019 22:27:46 GMT -8
Found the problem. The HP diaphragm was leaking. Phil hit the solution-make sure the spring holder is tight. now I feel like a dope for leaving it loose. I need to put some Teflon tape on the adapter I made to test and set the IP. With the leaks the IP is about 90 psi on a tank with about 2000 psi. I figure that's a decent starting place once I get the adapter sealed up I can set it to Nemrod specs.
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Post by vance on Mar 3, 2019 11:44:05 GMT -8
Phil- Thanks for the input. The OPV is not even installed, I'm using the adapter I made and the gauge setup I made. My gauge setup does have an OPV built in. IP is only about 30. I'm using the original rubber and phenolic gaskets. My understanding is that these aren't for sealing just spacing and to keep the spring holder from damaging the diaphragm when its tightened Yes, the bottom side of the HP diaphragm is the seal. The Snark III had paper and rubber washers on top, not phenolic, as far as I know. The HP nozzle has a phenolic washer, same size as USD. Did you remove the little brass washer and rubber seal for the OPV when you installed your adapter? The hole in the rubber one is too tiny for the port to be used with a second stage while it's in. I'd fish them out even if just using the gauge. A small o-ring can be used to sub for the rubber seal if it's crumbly. I had to reduce the od to get an o-ring in mine, but it works! You need to get one of these, and put your OPV back on! Email sent!
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Post by vance on Mar 3, 2019 19:15:24 GMT -8
Poor Skip might not know it, but we're mos' likely related. His last name and mine are on the "probly cousins" list. His momma would tell him to deny it!
But back to the subject: the part Skip's gonna get is the brass piece between the regulator body and the chromed adapter. It has a seat for the little rubber gasket on the back side of the second stage, a relief cut up inside for the LP spring to hold it in position, a hole through "to pass gas", M16 x 1mm threads to screw it in, and a 3/8" unf port for an LP hose/3 way splitter/ or pressure gauge.
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Post by snark3 on Mar 10, 2019 10:41:24 GMT -8
Ok so while I was working on the Snark 3 I was thinking. I know that's dangerous but here goes. Hopefully somebody will either confirm my thoughts or tell me where in my thinking I went wrong. On an unbalanced diaphragm reg like the DAAM and the Snark 3, IP increases as tank pressure decreases. The DAAM being a downstream second the increased IP exerts more pressure trying to open the second stage, thus making inhalation effort less as tank pressure drops. The Snark 3 being an upstream second as IP increases it exerts more force to hold the second stage closed. Does this in turn mean it should be harder to breathe as tank pressure drops in the Snark?
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Post by technidiver on Mar 10, 2019 12:09:19 GMT -8
Skip, as far as I know, you sound correct. If it was a single stage, I'd say that inhalation effort would drop but since it's an upstream two stage, with the IP increase it might become harder to breathe. Your logic is sound to me!
TD
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Post by snark3 on Mar 20, 2019 14:07:21 GMT -8
What is one to do after getting Snark 3 ser # 05486 back up and running after 25-30 years of it being a cool paper weight? Why not take #09477 apart? That's what I did this afternoon. This reg was absolutely filthy outside. It was also missing pieces from the OPV stage. Today I took the hoses off, they are toast. I took the cans apart, the LP diaphragm was soft and supple as was the exhaust mushroom. Inside it looked pretty clean. I decided to pull what remained of the OPV and install my IP test gauge (OPV built in). The tank has about 1500 psi in it, and to my surprise the IP went to 150, EXACTLY what Nemrod says it should be. Time to clean it up, put it back together and put it back in service.
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Post by vance on Mar 21, 2019 8:47:42 GMT -8
Excellent! Another working Snark III! I have OPV parts you can have for postage if you need them. I'm not sure I have everything, but let me know what's missing and I'll look. I found you can use a tiny o-ring as a replacement for the rubber seal under the little washer, if necessary.
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Post by snark3 on Mar 22, 2019 11:14:25 GMT -8
Thanks Phil. The OPV was actually set up different than 05486 was. They both had the brass washer in there, but the rubber parts above and below the washer were different. I'm curious which, if either, was actually correct. I think I'm going to try using the LP adapter I made for this one. The LP adapter you sent me is in 05486 and it works great, Thanks again. This makes 3 working early Snark 3 regs in my collection. My third one,09243 is in good working condition. This one still has the original hoses, and even the original cork "floater" is still there.
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Post by nikeajax on Mar 22, 2019 12:49:56 GMT -8
So what the devil was the idea behind that cork dingus anyway? "Hey guys, look, the cork is floating... I think we're underwater!" JB
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Post by vance on Mar 22, 2019 14:30:22 GMT -8
Thanks Phil. The OPV was actually set up different than 05486 was. They both had the brass washer in there, but the rubber parts above and below the washer were different. I'm curious which, if either, was actually correct. I think I'm going to try using the LP adapter I made for this one. The LP adapter you sent me is in 05486 and it works great, Thanks again. This makes 3 working early Snark 3 regs in my collection. My third one,09243 is in good working condition. This one still has the original hoses, and even the original cork "floater" is still there. I believe that the OPV had a little rubber washer w/ a small hole in the bottom of the bore and a brass washer with a hole large enough to clear the little seat on the end of the spring. None of mine had a rubber part above the brass washer. So it was, bottom to top: rubber washer, brass washer, seat, spring, body, adjuster, cap. Here's a few of mine: The satin one is the famous 250ft Snark. Here's what it looked like when found at 250 ft in Rock Lake:
I didn't find it, and did not do the preliminary cleanup. One of our members sold it to me for parts. I liked it so much I rebuilt it.
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Post by snark3 on Mar 22, 2019 15:11:23 GMT -8
That's a nice looking collection you have there Phil. 5486 had an Oring where the seat is on 9477, I don't know if its stock or if somebody did some customizing before I got it. JB- I have no idea what the cork floater was for, but I think its pretty cool that after 50+ years its still there. I was thinking about my Snarks. Mine all have short yokes and the HP nozzle actually holds the yoke on, the same as a DAAM. Now I'm wondering if I could put a USD long yoke on it and use a banjo.
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Post by vance on Mar 24, 2019 22:00:07 GMT -8
That's a nice looking collection you have there Phil. 5486 had an Oring where the seat is on 9477, I don't know if its stock or if somebody did some customizing before I got it. JB- I have no idea what the cork floater was for, but I think its pretty cool that after 50+ years its still there. I was thinking about my Snarks. Mine all have short yokes and the HP nozzle actually holds the yoke on, the same as a DAAM. Now I'm wondering if I could put a USD long yoke on it and use a banjo. As we have discussed in various Snark III threads, some USD parts will fit. I just put a DA yoke on my 250ft Snark, and it seems to fit fine. I'd say a long yoke will work on the Snark III.
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Post by snark3 on Mar 25, 2019 7:12:17 GMT -8
Thanks for confirming that for me Phil. I'm starting to think that even though actual Snark 3 parts are very scarce, with a little ingenuity and substitution we should be able to keep these regs going for years to come.
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