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Healthways Scubair

Discussion in 'Vintage Equipment Diving' started by Perryed, Oct 21, 2019.

  1. Perryed

    Perryed Nassau Grouper

    # of Dives: 500 - 999
    Location: Missouri
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    61
    28
    OK guys, I have a challenge for you. I have a vintage Healthways Scubair second stage in super condition. Except the diaphragm. It`s lost a LOT of it`s flexibility in 40-50 years. I`m looking for a replacement. It doesn`t have to be exact but pretty much anything would be better than the one it came with. It needs to be 3 3/16 inch (8.1 cm) in diameter with the edge .1 inch (2.8mm) thick. I have included some pictures of the regulator with the diaphragm. Hopefully I can find something close. Hell, it even works with an old Dacor diaphragm I had. It`s a very cool old reg even if it`s almost like breathing through a straw. I just would like it to work as good as possible. Any help would be greatly appreciated. PICT0009.JPG PICT0012.JPG
     
  2. John C. Ratliff

    John C. Ratliff Instructor, Scuba

    # of Dives: I'm a Fish!
    Location: Beaverton, Oregon
    2,688
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    Any of the Healthways diaphragms will fit the old Scubair. But you may have to find another old Healthways second stage to get the diaphragm. I doubt anyone stocks them anymore.

    The other option is to revitalize the old diaphragm. It can be done. Here are the steps:

    1. Coat the diaphragm with silicone grease.
    2. Let it sit with the silicone for about a week.
    3. Clean off excess silicone (you don't need to get it all, as the Healthways diaphragms have a nice groove to seat into, and won't pull out).
    4. "Work" the diaphragm by grabbing it, and move it vigorously between your thumbs and fingers. Don't worry about tearing it, as this is a nylon/neoprene diaphragm, and pretty much indestructible.
    5. Once the diaphragm is revitalized, put it back into the regulator and breathe off it.

    Now, a couple of other points. You only have the second stage; is it a downstream or tilt valve? Being a very old second stage, I have a feeling it's a tilt valve. If so, you need a first stage that delivers air at a slightly lower value than for downstream second stages. But realize that if it is a tilt valve, you also need an overpressure relief valve on the first stage, or you need another second stage which is downstream.

    SeaRat
     
  3. Perryed

    Perryed Nassau Grouper

    # of Dives: 500 - 999
    Location: Missouri
    113
    61
    28
    Thanks SeaRat, I`ll give it a try. And another question. How do I tell whether it`s a tilt valve or a downstream?

    Thanks! Perry
     
  4. Sam Miller III

    Sam Miller III Scuba Legend Scuba Legend

    # of Dives: 5,000 - ∞
    Location: CALIFORNIA: Where recreational diving began!
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    @John C. Ratliff
    (aka Good ole Sea Rat !)

    Great explanation !
    I used a similar technique on a old Heathway SCUBA Air -- worked great
    They seem to be indestructible-- this one is about half way to becoming a 100 year old regulator.
    I wonder if it will make it to 100 ? We- you and I- will never know

    Now your turn again --explain in 2500 words or less the difference between a tilt and a down stream

    SDM.
     
    JamesBon92007 and Perryed like this.
  5. John C. Ratliff

    John C. Ratliff Instructor, Scuba

    # of Dives: I'm a Fish!
    Location: Beaverton, Oregon
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    Perry,

    A downstream second stage has the seat on the downstream side of the valve. It has a flat lever system which lifts the valve off the seat. The spring is downstream of the seat, and pushes against the seat to form a seal at a set Pounds per Square Inch Guage, or psig (usually 125 to 140 or so psig). It looks like this:

    48752113602_4500dd30f2_k.jpg IMG_1267 by John Ratliff, on Flickr
    or this:
    48402060612_9d84f1b69e_k.jpg IMG_1184 by John Ratliff, on Flickr
    Here's a White Stag diagram of the downstream valve:
    40031462341_e318141f5d_k.jpg White Stag Regulator002 by John Ratliff, on Flickr

    The tilt valve has a very different look, and is simply a metal rod sticking out of the valve. To open it, the valve "tilts" and allows air to escape. In the diagram below, it would be part #40, a simply disc with a rod attached, which sticks through a hole (the valve seat) and has a rubber part upstream of the valve.

    48944307933_ca4a73f421_h.jpg Healthways Scubair diagram by John Ratliff, on Flickr
    (This Healthways parts diagram from Basic Scuba, by Fred Roberts.) Note that #8 on the Scubair, or #20 on the Scuba Star, is the overpressure relief valve.

    'Hope this helps.

    SeaRat
     
    OceanEyes and TomcatPC like this.
  6. TomcatPC

    TomcatPC Angel Fish

    # of Dives:
    Location: Toledo, Ohio, United States
    9
    9
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    I have a Healthways Scubair and a Scuabir 300, love them both! Never had any problems with their performance! Both are fun regulators to dive, plus they look like nothing else! More chrome than a '61 Cadillac!!
    Mark
     
    John C. Ratliff and Perryed like this.
  7. Perryed

    Perryed Nassau Grouper

    # of Dives: 500 - 999
    Location: Missouri
    113
    61
    28
    Thanks John, Mine looks exactly like the first picture inside. And as tomcat says they are beautiful regs. I`ll let you know how the silicone treatment works out for me.
     
    RayfromTX and John C. Ratliff like this.
  8. Perryed

    Perryed Nassau Grouper

    # of Dives: 500 - 999
    Location: Missouri
    113
    61
    28
    Didn`t work John. The diaphragm softened a little bit but still like breathing thru a straw. Need to figure how ti graft the outside of the Scubair to another diaphragm. Thanks for the try though.
     
  9. John C. Ratliff

    John C. Ratliff Instructor, Scuba

    # of Dives: I'm a Fish!
    Location: Beaverton, Oregon
    2,688
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    Check with several LDSs, as there are actually silicone Healthways diaphragms still around.

    SeaRat
     
  10. Perryed

    Perryed Nassau Grouper

    # of Dives: 500 - 999
    Location: Missouri
    113
    61
    28
    Yea, basically al I have to do is find one the right diameter.
     

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