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Thread: DIN regs Yoke Regs

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    Grouper MicahEW's Avatar
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    DIN regs Yoke Regs

    I have not reached this part of training yet but want to understand better. I have read that DIN is better than Yoke for higher tank pressure correct? Higher Pressure = more gas to breath?

    EAN is higher pressure than compressed air and thus requires a DIN not a Yoke and a better first and second stage than that found on compressed air?

    (feel free to correct me where I am wrong)

    so why use a DIN to Yoke adapter?

    I have more Q's but this is a good start.

  2. #2
    TadPole
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    there are two types of DIN valves 200 bar and 300 bar, the 200 will take th converter, as it is only 5 threads deep the 300 bar will not as it is 7 threads deep, for high preasure the 300 bar is rated higher but both will work on say a 3500psi steel tank, as for EAN nitrox can be put into any preasure tank, low preasure steel, 300 psi al or hp steel, it is put into your tank the same way as air.

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    Grouper MicahEW's Avatar
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    Quote Originally Posted by aiseson View Post
    there are two types of DIN valves 200 bar and 300 bar, the 200 will take th converter, as it is only 5 threads deep the 300 bar will not as it is 7 threads deep, for high preasure the 300 bar is rated higher but both will work on say a 3500psi steel tank, as for EAN nitrox can be put into any preasure tank, low preasure steel, 300 psi al or hp steel, it is put into your tank the same way as air.
    ok soo for deep diving 300 bar is better?

  4. #4
    Barracuda
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    Higher pressure= more gas in the same or a smaller space.

    EAN can go in any cylinder, it's a mix, just that. Air is EAN21, and that goes in evey cylinder, EAN36 is just more O2, still can go in any cylinder. The only consideration is how they make the nitrox, if they use partial pressure blending, you need an O2 clean clyinder, since they out in pure O2, then top off with air. If they use premix, it does not have to be O2 clean.

    Din to yoke adapter is good to have if your shop can't do DIN fills but can do yoke fills.

    Another thing to consider is that when traveling, yoke cylinders are the norm, so you will need a din to yoke adapter for your reg.

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    Barracuda
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    Quote Originally Posted by MicahEW View Post
    Quote Originally Posted by aiseson View Post
    there are two types of DIN valves 200 bar and 300 bar, the 200 will take th converter, as it is only 5 threads deep the 300 bar will not as it is 7 threads deep, for high preasure the 300 bar is rated higher but both will work on say a 3500psi steel tank, as for EAN nitrox can be put into any preasure tank, low preasure steel, 300 psi al or hp steel, it is put into your tank the same way as air.
    ok soo for deep diving 300 bar is better?
    Not necessarily better for depth, better for higher pressure. Depth has no effect. Also the 300 bar has a more secure connection due to 2 more threads.

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    Shark
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    Quote Originally Posted by MicahEW View Post
    I have read that DIN is better than Yoke for higher tank pressure correct?
    Yes, that's correct. High pressure tanks generally require a DIN fitting. It provides a more secure connection to the tank.

    Quote Originally Posted by MicahEW View Post
    Higher Pressure = more gas to breath?
    Nope. Higher pressure just means that the tank is designed to hold it's rated capacity in a smaller space. A 100 cubic foot low pressure tank and a 100 cubic foot high pressure tank both hold 100 cubic feet of gas. The difference is the pressure at which they're full. One holds 100 cubic feet when filled to 2400 psi, and the other at 3500 psi.

    Quote Originally Posted by MicahEW View Post
    EAN is higher pressure than compressed air and thus requires a DIN not a Yoke and a better first and second stage than that found on compressed air?
    Nope. EAN may have a different ratio of nitrogen and oxygen than regular air, but that has nothing to do with it's pressure. For most recreational diving mixes up to 40% oxygen, you can use the same regulator you would use with air.
    Last edited by MSilvia; 03-20-2008 at 15:08.
    Matt Silvia

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    Grouper MicahEW's Avatar
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    Quote Originally Posted by MicahEW View Post
    EAN is higher pressure than compressed air and thus requires a DIN not a Yoke and a better first and second stage than that found on compressed air?
    Nope. EAN may have a different ratio of nitrogen and oxygen than regular air, but that has nothing to do with it's pressure. For most recreational diving mixes up to 40% oxygen, you can use the same regulator you would use with air.[/quote]

    so for tec diving you use a DIN or yoke?

    and for tec would a higher O2 rated reg be the better choice?

  8. #8
    Barracuda
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    Quote Originally Posted by MicahEW View Post

    so for tec diving you use a DIN or yoke?

    and for tec would a higher O2 rated reg be the better choice?
    1) DIN is more common, since it screws into the valve rather than clamping on

    2)Depends on the mix, if you are diving EAN40 or below, you can generally dive on any regulator. If you are doing a deco hang on 100% O2, you need an O2 clean reg.

  9. #9
    Shark
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    Quote Originally Posted by MicahEW View Post
    so for tec diving you use a DIN or yoke?
    Most tec divers use DIN for reliability, regardless of whether they use a LP or HP tank.

    Quote Originally Posted by MicahEW View Post
    for tec would a higher O2 rated reg be the better choice?
    Divers who use gas mixes with more than 40% oxygen (or who mix nitrox in the tank by "partial pressure blending" pure O2 with air) need to have O2 compatable tanks, valves, and regs that use viton (or similar non-reactive) o-rings and which have been cleaned of any hydrocarbons or other substances that might combust in the presence of high pressure oxygen.

    There really aren't "higher O2 rated" regs... either they are O2 clean, or they are not, and if you use a clean one with an unclean gas mix it immediately loses it's "clean" status and must be O2 cleaned again before use with high O2 concentrations.
    Last edited by MSilvia; 03-20-2008 at 15:25.
    Matt Silvia

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    Grouper MicahEW's Avatar
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    There really aren't "higher O2 rated" regs... either they are O2 clean, or they are not, and if you use a clean one with an unclean gas mix it immediately loses it's "clean" status and must be O2 cleaned again before use with high O2 concentrations.[/quote]

    So can you buy a DIN first stage and buy any reg and have it cleaned?
    This is cool so really HP and LP and DIN and Yoke are different ways to achieve the same thing. Din is just more reliable than yoke.

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