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Thread: Sitech inlet valve

  1. #1
    RBW Member luki90 is an unknown quantity at this point luki90's Avatar
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    Sitech inlet valve

    I need to change my inlet valve (inhalation side), does a new sitech need to be oxy-clean?
    Thanks guys,
    Luca

  2. #2
    RBW Member michael-fisch is on a distinguished road michael-fisch is on a distinguished road michael-fisch's Avatar
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    Re: Sitech inlet valve

    don't know, but considering that I like chili, baked beans, hardboiled eggs and beer - I sure wouldn't want to use pure O2 as an inflation gas.
    MethOx is almost as dangerous as HydroOx and as much fun as mixing Acetylen and Oxygen.

    Nylon cover on a Thinsulate and possible sparking due to static electricity with lots of O2 at high pressures is not something I want to be wearing underwater.

    If I can't wear it in a chamber, it doesn't come in contact with pure O2

    Michael

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    Re: Sitech inlet valve

    Almost guaranteed they'll have loaded it with silicon grease. That said, it's only intermediate pressure so it'll probably be ok.

    Sadly, to get them open you have to peel off the gel sticker on the front.

  4. #4
    RBW Member Lancer4545 is a splendid one to behold Lancer4545 is a splendid one to behold Lancer4545 is a splendid one to behold Lancer4545 is a splendid one to behold Lancer4545 is a splendid one to behold Lancer4545 is a splendid one to behold Lancer4545 is a splendid one to behold Lancer4545 is a splendid one to behold Lancer4545 is a splendid one to behold Lancer4545 is a splendid one to behold Lancer4545 is a splendid one to behold Lancer4545's Avatar
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    Re: Sitech inlet valve

    All that usually goes wrong with the MAVs is the O'Rings fail after time and need to be replaced.

    Remove the MAV, prize off the Meg logo sticker which covers an allen key socket taking care to get under the sticky glue so you can replace it later. Fit an allen key into the socket on the outside and the other on the opposite side and unscrew them. This will give access to the O'Rings. Make sure to apply plenty of O2 lube when you reassemble the valve.

    It should take less than 15 mins and cost less than $1.00

    Regards,

    Lance

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    RBW Member michael-fisch is on a distinguished road michael-fisch is on a distinguished road michael-fisch's Avatar
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    Re: Sitech inlet valve

    Quote Originally Posted by Lancer4545  View Original Post
    All that usually goes wrong with the MAVs is the O'Rings fail after time and need to be replaced.

    Remove the MAV, prize off the Meg logo sticker which covers an allen key socket taking care to get under the sticky glue so you can replace it later. Fit an allen key into the socket on the outside and the other on the opposite side and unscrew them. This will give access to the O'Rings. Make sure to apply plenty of O2 lube when you reassemble the valve.

    It should take less than 15 mins and cost less than $1.00

    Regards,

    Lance
    If you use O2 lube you'll end up having to do it every single year until you get rid of the O2 lube and replace it with silicon lube.

    Michael

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    Re: Sitech inlet valve

    Quote Originally Posted by michael-fisch  View Original Post
    If you use O2 lube you'll end up having to do it every single year until you get rid of the O2 lube and replace it with silicon lube.

    Michael
    Michael, you should always service all your MAVs and everything else every year as part of your Annual Service anyhow, but I have not heard of what you are saying after many years of using O2 lube and teaching all my students to do the same.....

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    Re: Sitech inlet valve

    Crystal lube is well and widely known to fairly quickly turn into a crusty cake worse than a pornstar's face after a bukake video.

    Other lubes (I'm thinking Tribolube, Krytox et al) are much, much more civilised and last as a lube for as long as silicone will.

  8. #8
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    Re: Sitech inlet valve

    Quote Originally Posted by Captain Starfish  View Original Post
    Crystal lube is well and widely known to fairly quickly turn into a crusty cake worse than a pornstar's face after a bukake video.

    Other lubes (I'm thinking Tribolube, Krytox et al) are much, much more civilised and last as a lube for as long as silicone will.
    Krytox is expen$ive as all get out, and definitely worth it. The stuff stays slick, like, FOREVER. It's really nice to only have to lube a booster once.

  9. #9
    RBW Member michael-fisch is on a distinguished road michael-fisch is on a distinguished road michael-fisch's Avatar
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    Re: Sitech inlet valve

    Quote Originally Posted by Skipbreather  View Original Post
    Krytox is expen$ive as all get out, and definitely worth it. The stuff stays slick, like, FOREVER. It's really nice to only have to lube a booster once.
    My experiences with O2 compatible Lubes have been limited to Christa-Lube which has never lasted a whole year before becoming an O2 campatable rubbing compound, for that reason I refuse to use it and if it is on anything I buy - it goes into the heated sweep ultrasonic cleaner until all of it is removed.
    I'll take a look at one or more of the Krytox lubes and see how well it continues to lubricate after a couple of years.

    Michael

  10. #10
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    Re: Sitech inlet valve

    I just bought a pot of some other stuff off eBay which (apparently) is the same formula as Krytox 206 (O2 compatible grease with corrosion inhibitors) for about 1/10th the price of proper Krytox.

    Nothing's gone bang on it yet :)

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