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Post by nikeajax on Dec 31, 2019 16:38:29 GMT -8
...Okay, now I'm curious about something else. Does the DivAir have a Venturi assist? I see that there is a channel for the air, but this isn't explained by Fred Roberts in Basic Scuba, and so I cannot tell. What is your experience? John John, no it doesn't, the air gets deflected from the middle to the air horn: it breathes really well considering the early design... OK, gotta go make Lefse for New Years! JB
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Post by nikeajax on Dec 31, 2019 16:53:33 GMT -8
OK my friend, here's where the air gets blasted from: I think even the shape of the levers helps direct the blast JB
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Post by vance on Dec 31, 2019 17:27:14 GMT -8
My alloy DivAir has the long fingered lever, but it has the second adjuster. I wonder when the second adjuster appeared. It only seems to limit the height that the lever can flop upward so it doesn't sound like something is loose inside, or possibly to prevent the inner levers from falling out if the main lever is adjusted too low? Its serial #6975 has no letter. What th'? There is another distinctive difference between the earlier and later DivAir models. The later ones with plastic bodies have very poorly chromed covers. The earlier ones have a nice thick and shiny chrome coating, but the later ones are so thin that they look brassy. These have wear-through and corrosion problems, as you'd suspect. And, they're not pretty. Okay, now I'm curious about something else. Does the DivAir have a Venturi assist? I see that there is a channel for the air, but this isn't explained by Fred Roberts in Basic Scuba, and so I cannot tell. What is your experience? John It does not have a venturi any more than a Scuba does. There is the channel leading to the intake horn, and the central body casting directs air straight down the channel. They are a good breathing regulator. Something works right. I think Healthways made a mistake replacing this regulator instead of refining it. With a (very) little work, it would have been much better than the Scuba and the Scuba Deluxe and they wouldn't have run into problems with Cousteau patents.
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Post by vance on Dec 31, 2019 17:29:03 GMT -8
OK my friend, here's where the air gets blasted from: I think even the shape of the levers helps direct the blast JB I think so, as well. The whole top casting is designed to direct the air toward the intake horn.
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Post by nikeajax on Dec 31, 2019 17:59:39 GMT -8
OK, here are some more images to help: JB
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Post by vance on Jan 1, 2020 1:57:37 GMT -8
Thanks, JB, that is an excellent visual of the HP pin, which few will ever see, unless they have a metal DivAir or break the HP valve out of the plastic top can body casting. I've never seen or heard of a successful removal of the HP valve from the plastic body without destroying the regulator. I have seen broken bodies, so I would recommend not attempting to remove the HP valve nut.
As far as air direction goes, the levers, the central valve boss, and the channel seem to be designed to direct the air down into the intake horn. Study the picture of the reg body! That new, redesigned lever seems to cover the entire channel when pressed down by the diaphragm, which would direct the released air down into the air horn.
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Post by vance on Jan 3, 2020 15:47:51 GMT -8
My answer to the no HP soft seat problem: Outer sleeve on the HW Scuba seat.
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Post by nikeajax on Jan 3, 2020 16:12:38 GMT -8
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Post by vance on Jan 31, 2020 16:44:28 GMT -8
Jeff Heaton made me a new diaphragm and it's in the mail. Can't wait for this one to be done and dive-ready. I have 3 DivAirs now, all fixed, and ready to dive. I'm not taking any of them into salt water, but I'm looking forward to the pool tests! These 1955 era regs are excellent breathers!
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Post by nikeajax on Mar 17, 2020 9:02:24 GMT -8
PY, if I remember correctly weren't the hoses or mouthpiece on the Divair flavored with wintergreen? Do you remember reading this too? I bring this up because my wife was reading me something where they talked about using oil of wintergreen to soften rubber goods... DRW, are ya listening boy? I'm wondering if I could revitalize my Cressi Rondines this way JB
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Post by vance on Mar 17, 2020 9:06:59 GMT -8
PY, if I remember correctly weren't the hoses or mouthpiece on the Divair flavored with wintergreen? Do you remember reading this too? I bring this up because my wife was reading me something where they talked about using oil of wintergreen to soften rubber goods... DRW, are ya listening boy? I'm wondering if I could revitalize my Cressi Rondines this way JB Yep. According to Fred Roberts. I have a pair of the hoses, but there's no trace of wintergreen left. There are several Youtube videos that show how to soften rubber parts with it.
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Post by vance on Mar 21, 2020 8:21:27 GMT -8
Jeff from Canada just shipped me a passel of DivAir diaphragms. The two nearly complete Fs will now be dive-ready! The one without a cover will get one too, while it waits. He makes a beautiful diaphragm for these. I've ordered at least 6 of 'em from him, and referred several others. Those molds aren't cheap! I've had to make a couple of stainless clamps for the diaphragms, as the regs I recently go were missing a couple. I'll post a picture of one I'm working on now.
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Post by nikeajax on Mar 21, 2020 8:55:51 GMT -8
I've had to make a couple of stainless clamps for the diaphragms, as the regs I recently go were missing a couple. I'll post a picture of one I'm working on now. PY, could I get you to make one of them for me, please? I made one out of aluminum, but I would like a better one! JB
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Post by vance on Mar 21, 2020 9:41:56 GMT -8
The hardest part is drilling the screw holes w/o tearing the bends up when the drill bit breaks through. I'm making these out of CV joint clamps. These are thicker than the DivAir part at 1/4" opposed to 3/16". I cut the band down to 3/16" on one I made, but it isn't necessary. I left this one at 1/4".
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Post by vance on Mar 24, 2020 14:13:58 GMT -8
Ack! Silicone is good stuff but EASY to cut. I just ruined one of my new diaphragms by trying to (GENTLY!!!) slip the new clamp over the diaphragm with the screw/nut installed. Mistake!!! The clamp, which has very smooth edges, made a 1" cut through the diaphragm like it was a hot knife through...well,..., ....silicone. &^%$#@! Frick. $40 down the drain. Poop.
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