Old air compressor question

Discussion in 'Garage' started by Westislander, Dec 5, 2018.

  1. Westislander

    Westislander Full Access Member

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    I went and looked at an old 2stage air compressor that was for sale. When I spun it over it shot a little burst of air from a hole that had previously contained something. Does anyone have any idea what belongs here? A6FC0FEF-AB81-4CB2-8191-F6D42AB5DE28.jpeg
     
  2. Westislander

    Westislander Full Access Member

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    It’s a Wayne 2 stage pump and what ever is missing was on the intake port between the 1st and second stage. In fortunately it was not running so I don’t know what will happen when it is running. But for the price I paid I can’t loose :)
     
  3. Westislander

    Westislander Full Access Member

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    I think this is what is broke off.... but what is it? :shrug::shrug: 9A262362-16CC-49F4-8763-5E93C26D34F0.jpeg
     
  4. ajdemello

    ajdemello Full Access Member

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    I dont know much about compressors but could it be a pressure relief valve?
     
  5. skysurfer

    skysurfer Full Access Member

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    That's what it is.
     
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  6. rpcraft

    rpcraft Full Access Member

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    Yep its a pressure relieve safety valve. You should be able to file the boss down flat and tap it with a 1/4 NPT thread cutter. Just make sure that it is about 20 to 25 PSI higher than the max cut-out pressure. In the meantime you could just plug it with a pipe plug to figure out the pressure if you needed to.
     
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  7. Westislander

    Westislander Full Access Member

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    It is on the low pressure side so I am assuming it won’t be ore than 150psi, however I am having a hard time finding info on the pump
     
  8. Snoots

    Snoots Supporting Member Supporting Member

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