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Post by sitkadiver on May 30, 2013 12:31:41 GMT -8
Thanks for looking into your regs John. I'll take the seat out of the Hydro Twin tonight when I get home, but I must say, my NED does the same thing. IP swings dramatically between an empty and a full tank. The NED reg I have is identical in appearance to my Hydro Twin. A down stream valve and no over pressure releif valve(ruling out a Dual Air).
I will do the disassembly with a copy of Basic Scuba on the desk.... I'm wondering if I'm missing part #2....
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Post by sitkadiver on May 30, 2013 12:37:06 GMT -8
I'm a wee-bit-confused; so the Navy-Unit is unbalanced? DAVE... you gave me an unbalance reg?!?!?! SNORT!!!! Gosh, I was under the impression it was balanced--so now I know! One-a these days I gotta get me a coupl'a second stages fer that thing... Jaybird Mr. J., I did not realize that at the time. Please accept my most sincere apologies. Respectfully, An unbalanced diver.
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Post by nikeajax on May 30, 2013 14:36:06 GMT -8
I'm guessing to get the HP-seat out it's more, or less, like the Healthways--RIGHT?!?!?!? I just use a small-blunt probe of some sort and push it through the four outside holes, not the middle one. I'm asking this because mine is frozen in-place and don't want to damage it...
Jaybird
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Post by SeaRat on May 30, 2013 16:43:34 GMT -8
Well, with my knee active the way it is, it is good to have another topic to focus on. I took my Hydro Twin first stage apart, and confirmed that it is indeed a balanced first stage. While I don't have my pressure gauge for the intermediate pressure right now (it's here somewhere) I did put it on a tank with less than 300 psig and a tank at 1965 psig, and it breathed the same for both tanks. I also photographed the first stage components. Here are those photos: This shows the Hydro Twin with the first stage components laid out. This shows those components. Note the seat on the stem, and the ring with the O-ring that seals the stem. Here are the components together, as they would be in the first stage. The O-ring that seals the seat stem is located inside this ring. The H.P. valve seat is located in the regulator body, and has the pin showing through. I took a photo of the main body threads, and it did not show the hole for the equalizing chamber. I re-took the photo with the strobe as close to the lens as possible, and this one shows the hole that allows HP air to balance the seat stem (#20B H.P. seat). I lubed the O-rings and put them back on, then re-assembled the first stage (it only took about five tries to get the H.P. seat and the seat stem guide (#96) into the body. But it works, and is balanced. John
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Post by sitkadiver on May 30, 2013 16:47:23 GMT -8
Jay, It looks exactly like the Healthways. I couldn't wait any longer, so I went home and popped the seat out. It's the unbalanced variety. The part inside the reg looks like the the HW also: Attachment Deleted
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Post by sitkadiver on May 30, 2013 17:01:41 GMT -8
John,
You and I were posting at about the same time.
Holy COW!! 2 different first stages, and both have the Hydro Twin label? I knew something was amiss... Now I know.
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Post by SeaRat on May 30, 2013 17:08:39 GMT -8
Wow, that is interesting. What's your SS#? Mine is 00553.
John
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Post by nikeajax on May 30, 2013 17:28:49 GMT -8
Mine looks like it has a teflon or nylon HP seat, whereas the Healthways, has an all-steel seat, you know the flippy-aroundy-part, yeah I know stop getting so danged technical; in John's image it's the second piece, right after the holder-onner-nut...
Jaybird
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Post by sitkadiver on May 30, 2013 17:35:51 GMT -8
Wow, that is interesting. What's your SS#? Mine is 00553. John S/n is 00172
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Post by sitkadiver on May 30, 2013 17:39:25 GMT -8
Attachment DeletedMine looks like it has a teflon or nylon HP seat, whereas the Healthways, has an all-steel seat, you know the flippy-aroundy-part, yeah I know stop getting so danged technical; in John's image it's the second piece, right after the holder-onner-nut... Jaybird Mine looks like a single stage Healthways. Even has the flippy-around part in the reg, but I cannot attach the photo as it is too large a file. I'll get it on photobucket soon.
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Post by sitkadiver on May 30, 2013 17:43:39 GMT -8
Wow, that is interesting. What's your SS#? Mine is 00553. John Makes me wonder if you have a Hydro Twin II that was labeled with a surplus label until the newer labels were available. Also makes me wonder if I could take a balanced 1st stage out of a Navy approved and make this a balanced reg...
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Post by SeaRat on May 30, 2013 22:26:58 GMT -8
Mine looks like it has a teflon or nylon HP seat, whereas the Healthways, has an all-steel seat, you know the flippy-aroundy-part, yeah I know stop getting so danged technical; in John's image it's the second piece, right after the holder-onner-nut... Jaybird Jaybird, Nope, the seat ("flippy-aroundy-part") is fifth down on that post, and still in the regulator. I know what you are talking about though, and in the Healthways it is a metal disk that has an O-ring, and is reversible. You can use the pin in the Healthways to remove it, but in the Sportsways it is more difficult. By the way, Dave, I should have used the S/n# rather than "SS#" as I think that is the Social Security number. My knee must have throbbed a bit right then. John
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Post by nikeajax on May 31, 2013 9:41:47 GMT -8
GRRRRR--time to get out the PB-Blaster again! I think Dave said his friend was using the Navy Unit he gave me to regulate an air compressor, and was outside for many-many years! The good part is the HP-seat is the only thing I can't get out: I'll use some Dawn dish washing detergent to clean the penetrating oil off. Side note: when I was trained in bird-rescue, which is why I go by "Jaybird", they would ONLY use Dawn, as it has superior oil cutting/solving properties, but safe enough to use on birds! If you ever see a van pull up to the water's edge, and it says "DAWN" on the side, it's the bird rescue folks! blog.bird-rescue.org/index.php/tag/dawn/Jaybird
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Post by SeaRat on May 31, 2013 10:50:09 GMT -8
Jaybird, you might want to find a metal rod, put some plastic on it (perhaps some glue) so that it won't scratch, and fit it through the center hole of the main body from the diaphragm side. Then gently push out the seat valve. Lube it first with either your Dawn or with sprayed silicone (let it stand for 24 hours after the spray to let it soak into the O-ring), and it should come out fairly easily. Since it is reversible, be cautious not to scratch the inside surface, as that is virgin territory (hasn't been touched). I have used an Allen wrench of the appropriate size to do that work. But be sure to not have metal-to-metal contact with the seat surface. Putting some cloth on it may also help, but it has to be tiny to go through that hole.
John
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Post by cnotthoff on May 31, 2013 12:11:48 GMT -8
I didn't catch whether you had replacement seats for this reg. Would any of this be helpful to your project? Charlie Attachments:
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