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Chinese Compressors...connecting Up

Discussion in 'Anything Airgun Related' started by Lev Levvin, Oct 25, 2019.

  1. sagalout

    sagalout What a plinker!

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    That's the famous song "half a crown sixpence half a crown sixpence"
     
    Lee-G likes this.
  2. sagalout

    sagalout What a plinker!

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    And here it is all put to bed.

    DSCN1876.JPG DSCN1877.JPG
     
    Kev The Fish and Metradio like this.
  3. talyllyn

    talyllyn Engaging Member

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    That's the point - warm air holds more moisture than cold air hence the condensation on the windows so why not dry the air first?
    I'm sure there is some complicated physics involved with all this, obviously we are talking about very high pressure on the outlet side and maybe that changes the "normal" rules.
     
  4. sagalout

    sagalout What a plinker!

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    I think if you could get the input air dry it would be good but I don't think you can, if I stripped my Hill MK4 after pumping, even with a brand new dry pac, the inside of the pump would be wet. Hence the reason I have the little blue filters in "stock" I use them on the output of my FX pump (soon to be homeless :)).

    The hill dry pac in particular strikes me as odd, it is open to the air all the time so why doesn't it saturate even when the pump is not in use, also (whilst I'm on a roll) why is it recommended to change every 3 months no matter what the ambient humidity is or how often you use the pump???? Don't make no sense to my simple and tiny little mind. The FX system of magic balls seems to work well, I always get loads of vapour from the bleed port but me little blue filter always seems clean and dry.
     
    Last edited: Oct 31, 2019
  5. Wewekokowe

    Wewekokowe Engaging Member

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    LVO200 is an Ester oil quite pricey and probably you can’t get off eBay, it has flash point of 260C
    I am using that. Smells bad and turns yellow or green as it ages but should not diesel much.
    Maybe one day I can check the level of CO or CO2 in the output by some gas analyser, that would prove if there is any burning going on.


    Maybe all these pumps are little engines puffing away merrily filling our tanks with exhaust gas
    Ha ha
     
    Last edited: Oct 31, 2019
    sagalout likes this.
  6. PW1

    PW1 Shooting the breeze.

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    Wouldn't it be easier to rig up your bottle to a breathing mask and try it overnight:D

    Regards
    Peter
     
    Metradio and sagalout like this.
  7. Lee-G

    Lee-G Engaging Member

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    Just had to check what oil I'm using since it seems another factor to be considered
    Draper 34683 1L Compressor Oil
     
  8. sagalout

    sagalout What a plinker!

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    Looks right to me @Lee-G, expensive though. This meets the spec and is a lot cheaper

    draperoil.jpg
     
  9. Kev The Fish

    Kev The Fish Buxted Rifle Club Member

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    I think they recommend type 46 hydraulic compressor oil
    That's what I have been using
    Mind you it does stink
    I used to operate a 360 crane with grab many years ago and it always stank especially if one of the big pipes went, they used to spray everywhere & if the wrong one went you could end up stuck up in the air in the lifting can
    Kev

    .
     
    sagalout likes this.
  10. sagalout

    sagalout What a plinker!

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    Mine recommends either compressor or hydraulic as long as it's "46"
     
  11. Wewekokowe

    Wewekokowe Engaging Member

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    Many oils meet that viscosity requirement 46 means that it is not too thick and not too runny lol at 40 degrees. Well not many run it that cold so it is meaningless

    I believe you have to set your own requirements you think will bring benefit. If you find a higher flash point oil than 260C let me know

    Safety data sheets list the flash point, try to find the data sheet for the oil you are using
     
    Last edited: Oct 31, 2019
    sagalout likes this.
  12. sagalout

    sagalout What a plinker!

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    I understand the what the numbers mean in oil specs but that is about it :), as a simple village idiot I can only be guided by the manufacturer's spec, if the spec states 46 I would need a bit of convincing that I should use 5w/30.

    The flash point for the hydraulic oil I'm using is 216c, this was cheap (now £11 for 5L) and I am changing it frequently, 3 times it the first hour, and now every hour. when this is gone I am changing to compressor

    The compressor oil I am thinking of changing to has a flash point of 230, I have just been looking at one that is designed for low carbon deposit but it doesn't give a flash point so I will probably ask them for a data sheet before buying.

    I am also wondering if I a just as well off sticking with hydraulic and frequent changes, I can change to a more expensive oil and maintain frequent changes, it only holds 300ml so 5L for under £20 is affordable. Decisions, decisions.
     
  13. sagalout

    sagalout What a plinker!

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    I got the cheap thermometers today, same as the one on the compressor.

    25L of water, 2.5L ice, 2 x 10L spare water, exhaust to a separate bucket, replenish on a cycle.
    16" pedestal fan blowing on full power at the the back (motor fan intake) of the compressor.
    Input water temp 12C exhaust 16C stayed pretty much constant whilst I did a ten minute run taking the 7L from 200 to 250 bar. Compressor never went above 44c. The bottle pressure remained at 250bar after filling i.e. did not drop through cooling.

    Thanks for all the contributions on how to do this. My one last thing now is the air pump when it arrives, I shall report back.
     
    Kev The Fish and Metradio like this.
  14. sagalout

    sagalout What a plinker!

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    Oh dear how annoying, off now, just seen this I paid nearly double :rippedoff:
     
    Metradio likes this.
  15. Mr Bond

    Mr Bond Engaging Member

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    There’s a pretty good review video of compressors just posted up on Airgun 101.

    I think this little compressor faired well really.
     
  16. sagalout

    sagalout What a plinker!

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    I watched that, I don't think you can't beat these for value for money, he bought the wrong one really, mine was £157 asking price (10% off ebay offer, so £141, UK stock ordered, paid 23rd, dispatched 24th, delivered 25th) came with a high quality "UK Kettle lead", the water pump pipes are a high quality soft, thing silicone type, the temperature gauge on was properly connected (his wasn't the probe goes into a hole in the HP cylinder). Mine is an actual 100% genuine Yong Heng, not a Tuxing copy.
     
    Mr Bond likes this.
  17. Metradio

    Metradio Engaging Member

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    Mike
     
  18. PW1

    PW1 Shooting the breeze.

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    That's well worth a look at :thumb: and doesn't completely slag off the eBay special.

    Regards
    Peter
     
  19. v1ktor

    v1ktor Engaging Member

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    He certainly did buy the wrong one. Over £2k and it didn't last 5 minutes. And it's a re-badged Coltri. Then makes excuses that he may have got 'the Friday afternoon one'. Over £2k, there shouldn't be any 'Friday afternoon one'.

    I'm sure he wouldn't have had that approach had his China 'Ebay special' failed after 5 minutes.

    Still, a useful video if only to show the level of profit for which some distributors want to fleece the market. I could, though I doubt I'll need to, buy 10 China specials rather than the Daystate and still have a considerable wedge left in my pocket.

    Definitely food for thought.
     
    Mr Bond and sagalout like this.
  20. sagalout

    sagalout What a plinker!

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    Location:
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    If ever you in the area @v1ktor you can pop in and have a look at my setup and get a free fill with a cup of coffee included in the price :)
     

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