THREAD Heat exchange to pressure gage (spitfire)

Discussion in 'Ask Our Repairmen' started by Batista230, Jul 4, 2009.

  1. Batista230 New Member

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    There is a 90 elbow that screws into the heat exchange and screws into the stainless steel braided hose that goes off to the pressure gage
    on the end that screws into the heat exchange is a 1/4 NPF
    But the other end that screws into the hose is smaller then 1/4 but larger than 1/8
    So what the hell is it
  2. Batista230 New Member

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    [IMG]

    the threads on the brass elbow are shredded to bits and i need a new one but can find anything to match the thread of the hose as it dose not appear to be standard pipe thread
    _____________________________
    stainless steel thread on to brass threads no sirprice on whats going to happen
    another c**p design by HydraMaster
  3. Ara Klujian Moderator & TMF Repair Expert

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    NPT sizes are 1/16, 1/8, 1/4, 3/8, 1/2 etc, etc. I could be a flare fitting in that case NPT will not thread.
  4. dgardner New Member

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    Does your fitting look like this? (not blue, of course):
    This is an 'inverted flare' connection.

    Attached Files:

  5. Batista230 New Member

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    I have never hered of a flare fitting
    is it a fitting with the manufatures own threads
    In the UK all BSP fitting will fit NPT so there is nothing I can find to fit

    Dose anyone know wear i can buy the fitting i need
  6. Ara Klujian Moderator & TMF Repair Expert

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    A flare fitting is a type of compression fitting that requires no sleeve or teflon tape. Any hardware store or home depot should carry them.
  7. Batista230 New Member

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    So if i take my hose into a hardwear store like an ironmongus (do you think a plum centre as well) you think they may have something to fit the end of the hose
    I have no idear what size that is though

    It just finding it in a 90 deg and with 1/4 pipe thread on the other end
  8. Ara Klujian Moderator & TMF Repair Expert

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    Why not just remove the elbow and pressure line and duplicate it or make your own. Perhaps the threads are stripped.
  9. Duane Oxley MIA

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    I'm pretty sure that what you have is a "JIC" fitting. It is, as Ara said, a flared fitting. JIC is a Japanese standard ("Japanese Industrial somethingoranother), that's commonly used in hydraulics.

    Personally, I avoid them, because they're difficult to find for end- users (system owners) when needed.

    Just change it over to something more commonly available to you and keep on cleanin'...:bigsmiley:
  10. Batista230 New Member

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    There is no dowt about it the thread is shreded to nothing on the brass elbow
    Its the stainless steel nut on the end of the stainless steel hose thats done it
    (brass threads on to stainless threads dont go down well) and the more i think about it the two threads wear probaly diffarant anyhow thats shreaded it even more so

    I amagine i could buy the elbow from HydraMaster but knowing what a rip off murchant they are not being able to find the fitting ells wear they would want a million willion dillion pounds for it

    I thought about cutting the end off the hose and putting a new tail with BSP and feral in and having it put in someones pipe crimping machine
    But because HydraMaster have made the hose so short it cant be shorted; and this is another reason why this has happened, doing anything to the gage require taking the hose off the heat exchange side

    I'll try first taking it into a plum centre to see if they have any flare fittings to fit but if not theres a tractor shop round the corner who have a 1/4" BSP tapes and i think there would be enoth wallage on that nut to cut a thread
    If not (like AJ said) then i'm afrade its going to cost a new hose job
    Just a bit pi**ed off that hydramaster have done all this and I cant find anything to fit
  11. Kevin Dumas Member

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    Is your heat exchanger in clear view?

    I had one that I took the hose and gauge out of the panel and threaded a 1/4" pressure gauge directly into the heat exchanger.

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