Yawana Dive
Regular Diver
Diving the Solomon Islands
Posts: 45
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Post by Yawana Dive on Jun 7, 2021 13:41:14 GMT -8
Yes it’s amazing how the same basic design works for double hose and single hose regs. I’m definitely interested in acquiring one of your spare seats Vance. I’ve got two of these regs now, Navy Unit and the Hydronaut and I intend to do plenty of diving with them. I’ll send you a message and we’ll work something out. Thanks for the guidance in getting photos up on this site. I’m gonna bomb you guys with pics from now on.
John, I’ve been lucky with the exhaust Ts. They can really be a problem with the vintage gear. Before bidding on a reg online the first thing I look at in the photos is the condition of the exhaust T. I’ve got four Sportsways 2nd stages now and three of them have good Ts.
I’m glad you guys appreciate these regs. I’m still amazed that it’s possible to dive gear from 1961 (stamped on the hoses) five years before I was even born.
Cheers
Andrew
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Post by nikeajax on Jun 7, 2021 14:34:49 GMT -8
1966 was a good year, wasn't it PY, when you get yer package ready to send to Andrew, you may want to put a few small pieces of 600, 1500 and 2000 grit paper in there for him so he can refinish any new seats he gets in the future. Andrew, you can sometimes resurface your flat type seats, like in Phil's image, using the same drill-chuck method Resurfacing helps keep the creative vocabulary down to a minimum JB
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Post by vance on Jun 7, 2021 15:47:12 GMT -8
I'm trying to respond to this post, but I got a cast put on my right hand today, and I keep getting messed up from unintended clicks and such. I hope to become used to this and will be able to post w/o screwing up continuously. However, pls continue to entertain me with your projects.
I am following!
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Post by nikeajax on Jun 7, 2021 15:50:42 GMT -8
Well damnitall bruddah--I'm sorry to hear that! JB
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Post by vance on Jun 7, 2021 15:53:43 GMT -8
1966 was a good year, wasn't it PY, when you get yer package ready to send to Andrew, you may want to put a few small pieces of 600, 1500 and 2000 grit paper in there for him so he can refinish any new seats he gets in the future. Andrew, you can sometimes resurface your flat type seats, like in Phil's image, using the same drill-chuck method Resurfacing helps keep the creative vocabulary down to a minimum JB No prob! I can't remember if the SW flat seats were meant to be replaceable. If they are cast, they might be dug out and replaced with a standard silcone disk seat. If it is an odd size, a punch can be made for any size seat.
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Post by SeaRat on Jun 7, 2021 16:04:59 GMT -8
1966 was a good year, wasn't it PY, when you get yer package ready to send to Andrew, you may want to put a few small pieces of 600, 1500 and 2000 grit paper in there for him so he can refinish any new seats he gets in the future. Andrew, you can sometimes resurface your flat type seats, like in Phil's image, using the same drill-chuck method Resurfacing helps keep the creative vocabulary down to a minimum JB The year 1966 was the year I had to make a major decision; either accept the draft, or join either the Navy or U.S. Air Force. Well, the Navy had no slots, so I talked with the Air Force recruiter. I told him that I needed to join or be drafted, but that I really wanted to finish my term at Oregon State University. "No problem," he stated. "We'll put you onto a delayed enlistment." So I signed, deciding to join the USAF in January, 1967. Then came my draft notice, and the requirement for me to take an Army physical. I talked to my Air Force recruiter, and he again said, "No preblom...we'll let the Army pay for our U.S. Air Force physical. Just go up and take the physical, and we'll charge that off to the Army." So, that's what I did. John
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Post by vance on Jun 7, 2021 17:08:03 GMT -8
That was my story as well, on 12/1/1969. It was the first year of the lottery for 19 year old men (boys). My number was going to be called up, and there were no deferments for school, etc.
I joined the Navy the next day. I really couldn't see myself being offloaded from a Huey into a rice paddy, clutching an M16 and not knowing which way was up, in 8 weeks, so I took the USN path.
It was a good experience. I'm not sorry for it, at all.
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Yawana Dive
Regular Diver
Diving the Solomon Islands
Posts: 45
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Post by Yawana Dive on Jun 10, 2021 13:54:47 GMT -8
Yesterday I went for a dive with my Navy Unit and noticed some strange behaviour. (Note: this is my Navy unit not the Hydronaut we discussed earlier in this thread.) Firstly, it felt a little harder to breathe and I thought to myself maybe the the 2nd diaphragm is not as supple as I thought. Then I looked at the Seaview SPG and noticed it dipping each time I inhaled - “hmm” me thinks, but the tank valve is fully open and the sintered filter is clean. I continue the dive and noticed the breathing resistance improved and the SPG dipped less and less as the tank emptied and the intermediate pressure increase in the 1st stage. After the dive I checked the ip and found it to be 70 on an full tank with about 2,2000psi, and a whopping 140 on an empty tank at 200psi. “Whoah” me thinks, it’s time for a rebuild! I serviced this reg about 2 weeks ago, cleaned, lubed and Orings changed. I reused the diaphragm because it looked OK. I think the HP seat is good because the regulator lock up sharply, it’s just the huge amount of difference in ip that’s indicating a problem exists. So ... this forum being the source of all knowledge and profound wisdom on the subject - I ask you where is the problem? I’m going to start with replacing the diaphragm, but I’m willing to open the books and take wagers on the seat or springs.
Comments and opinions welcome.
Cheers
Andrew
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Post by nikeajax on Jun 10, 2021 17:09:08 GMT -8
Andrew, when you tear it down this time, pull the HP-diaphragm then hook it up to a tank: if it locks up you'll know the valve-plunger is in good shape. Turn off the air then use a blunt probe to decompress it. Your IP should be no higher than 110-psig, but I set mine at 95-100-psig range for ease of breathing. A higher IP will cause a significant lag something like 1/2-second at around 135: there should be no lag-time. I hope this helps mate, cheers! Jaybird EDIT: You do know that a tilt-valve will lock up very tight if the valve-plunger is faulty right? Didn't you say you have the OPRV set to trickle? If that is the case, perhaps the plunger is leaking and the OPRV is bleeding enough pressure to let you get air from the second stage?!?!?!? The OPRV should not leak any air.
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Yawana Dive
Regular Diver
Diving the Solomon Islands
Posts: 45
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Post by Yawana Dive on Jun 10, 2021 21:48:33 GMT -8
Hi JB
You talk about the plunger .... do you mean the pin between the diaphragm and the seat?
Good point about the OPRV ... I’m not sure if it was leaking air or not. I forgot to check that. But I did find the tilt valve seemed to be breathing easier as the ip crept up which is the inverse of what you’ve experienced.
I’ll tinker a bit more before I pull it apart.
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Post by SeaRat on Jun 10, 2021 22:27:31 GMT -8
Yesterday I went for a dive with my Navy Unit and noticed some strange behaviour. (Note: this is my Navy unit not the Hydronaut we discussed earlier in this thread.) Firstly, it felt a little harder to breathe and I thought to myself maybe the the 2nd diaphragm is not as supple as I thought. Then I looked at the Seaview SPG and noticed it dipping each time I inhaled - “hmm” me thinks, but the tank valve is fully open and the sintered filter is clean. I continue the dive and noticed the breathing resistance improved and the SPG dipped less and less as the tank emptied and the intermediate pressure increase in the 1st stage. After the dive I checked the ip and found it to be 70 on an full tank with about 2,2000psi, and a whopping 140 on an empty tank at 200psi. “Whoah” me thinks, it’s time for a rebuild! I serviced this reg about 2 weeks ago, cleaned, lubed and Orings changed. I reused the diaphragm because it looked OK. I think the HP seat is good because the regulator lock up sharply, it’s just the huge amount of difference in ip that’s indicating a problem exists. So ... this forum being the source of all knowledge and profound wisdom on the subject - I ask you where is the problem? I’m going to start with replacing the diaphragm, but I’m willing to open the books and take wagers on the seat or springs. Comments and opinions welcome. Cheers Andrew Andrew, It is normal for a diaphragm first stage to read the IP low at high tank pressure, and higher at low tank pressure. BUT, going from 70 psi to 140 psi seems excessive. Unfortunately, I don’t have an answer. What I think you should do, before doing what JB states, is to take the reading at about 500 psi. See if that is more reasonable. If so, then we need to see whether there might be a leak in the first stage at the low pressure (120 psi). I don’t even know if that is possible, but it seems the only reasonable answer. John
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Post by nikeajax on Jun 11, 2021 8:04:56 GMT -8
Oh, sorry: both Healthways and Sportsways used that same type of soft valve seat and called it the valve-plunger, as it pushes or plunges against the actual hard valve seat. So, if it does lock up, use a small blunt probe to open the valve by pushing it through the opening where the push rod would go through. I hope that makes sense to you? I just woke up and never sleep well JB
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Post by vance on Jun 11, 2021 8:13:45 GMT -8
As some of you know, I like to try to keep things straight by using the terms hard seat and soft seat, and the identifier LP and HP with them. I, for one, leap to conclusions (often wrong) when it isn't spelled out. Don't get me started on "adjustable orifice"....
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Post by nikeajax on Jun 11, 2021 8:29:00 GMT -8
PY, you are right: I will try to do that in the future. My often very sleep deprived OCPD-brain always wants me to use the "official nomenclature" JB
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Post by nikeajax on Jun 11, 2021 8:42:00 GMT -8
Someone please check my logic: If the soft seat is bad/faulty this is going to cause the IP to climb. At a high tank pressure it's going to make the OPRV to leak, at the very low tank pressure, there isn't enough pressure to pop the OPRV. So, with it bleeding it's venting causing the 70-psig reading: with the non venting it's climbing to 140-psig. Does that make sense?!?!?!??! JB EDIT: this would account for the radical readings with each breath, no?
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