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  1. #1
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    problem in sabroe screw compressor 151



    Gents .
    before few days we faced problem in our screw sabroe compressor 151 that compressor run few seconds and stop with out alarm . after monitoring we found the capacity not increase that mean still zero also the oil pressure after stop still gives 1.2 bar . but if shutoff the suction valve . the oil pressure gives zero bar .
    I suspect the suction check valve not working Correctly , Although I checked that valve physical and we don't found any thing trouble .
    can you please help us to solve that issue .
    thank you for all .

    yacoub



  2. #2
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    Re: problem in sabroe screw compressor 151

    It seems strange, perhaps the pressure gauge.

    Josef.

  3. #3
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    Re: problem in sabroe screw compressor 151

    thanks josef
    please note that I changed the oil pressure sensors and gives same value

  4. #4
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    Re: problem in sabroe screw compressor 151

    But you have to find out the essence of the trace compressor.
    Suction transmitter.

    Josef.

  5. #5
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    Re: problem in sabroe screw compressor 151

    please note that we have standby compressor and I don't found any difference in suction pressure reading that mean gives same value between the standby comp. and the comp. that has problem


    yacoub

  6. #6
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    Re: problem in sabroe screw compressor 151

    There are not many options.
    You have checked the suction valve, I assume the entire suction pipe line is OK.
    Bad seting-bad transmitter or clogged suction filter, but the suction filter is a low probability.
    You wrote that the compressor shutdown and no warning alert. Unisab will not leave the compressor without warning, only when setpoint.

    Josef.

  7. #7
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    Re: problem in sabroe screw compressor 151

    Have you tried running in manual to eliminate control signals.
    Check loose electrical connections l
    check relays.
    Interlocks like flow switches or high level protection, timers.
    Starter run signal.

  8. #8
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    Re: problem in sabroe screw compressor 151

    Hi,

    not sure, but all what you describe point to some external stop signal or missing start signal from your system ...

    you should have alarm notice if you have an alarm situation ... otherwise is normal stop .. check your set points as suggested by Josef ...

    Can be very simple problem and sometimes we .. can't see the wood for the trees ...


    Best regards, Josip

    It's impossible to make anything foolproof because fools are so ingenious...

    Don't ever underestimate the power of stupid people when they are in large groups.

    Please, don't teach me how to be stupid....
    No job is as important as to jeopardize the safety of you or those that you work with.

  9. #9
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    Re: problem in sabroe screw compressor 151

    Thank to all
    I checked all thing you told to me . but I don't found any thing trouble . the sitting don't changed , don't have electrical losses .
    but after run the compressor in manual mode , the suction pressure decrease , knowing that capacity zero .also the current high gives 300 A at zero capacity .
    Is the problem will be in the capacity slide ?

    yacoub

  10. #10
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    Re: problem in sabroe screw compressor 151

    Yacoub
    Does this machine have capacity indicator under a box on side of machine?
    It has a pin that moves in & out pushing a potentiometer.
    Check it against reading on screen.
    Unloaded pin in unloaded, out loaded.
    See where is, move it see if it changes reading or just see where it is first.

  11. #11
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    Re: problem in sabroe screw compressor 151

    thank you ranger1 and all friends
    the problem solved . we found the screw on the slid piston as picture below damaged and free I don't know the reason why that happened . we replacement that screw and the compressor back run normally with good reading .
    thank you all for support me .



    ٢٠١٨٠٣٢٧_١٣١٤١&#16.jpg٢٠١٨٠٣٢٧_١٣١٤١&#16.jpg٢٠١٨٠٣٢٧_١٣١٤٢&#16.jpg

  12. #12
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    Re: problem in sabroe screw compressor 151

    The loose screw has the essence, but OK.
    Question, 2 pieces of washer is back or in the separator?

    Please next time give 100% information, find out in 3 days that you 300 Amper?

    Josef.

  13. #13
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    Re: problem in sabroe screw compressor 151

    sorry josef
    thanks

  14. #14
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    Re: problem in sabroe screw compressor 151

    And washer?

  15. #15
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    Re: problem in sabroe screw compressor 151

    I don't find the washers and installed the slid without washer .
    is their washers very important ?
    Last edited by yacoub; 28-03-2018 at 07:14 AM. Reason: change some of word

  16. #16
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    Re: problem in sabroe screw compressor 151

    3ECD67BB-B885-4619-96E1-850E802441E8.jpg

    Position 97 part 534A0932H01 Washer Set (Spherical)

  17. #17
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    Re: problem in sabroe screw compressor 151

    Maintain stability and length. There are two pushing ones against each other. Also, if you have not threaded Loctite thread, the problem will be repeated. The pad can also be in the compressor and that's a big problem.

  18. #18
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    Re: problem in sabroe screw compressor 151

    Dear Josef
    please what can I doing to not repeat that problem and to save the compressor ?

  19. #19
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    Re: problem in sabroe screw compressor 151

    It is important to find 2 pieces of washer.
    If you do not find the compressor, they'll be in the separator, okay. Buy new washers and new bolt. Installing new bolt and new washers will be a headache !!!

  20. #20
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    Re: problem in sabroe screw compressor 151

    thanks Josef
    I'll request the washers and the screw


    Capture.PNG

  21. #21
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    Re: problem in sabroe screw compressor 151

    Screw 534A0572H01
    washers set spherical 534A0931H01
    WP_20180328_002.jpg
    WP_20180328_003.jpg

  22. #22
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    Re: problem in sabroe screw compressor 151

    about the root cause to that problem . any explain ?

  23. #23
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    Re: problem in sabroe screw compressor 151

    Explanation simple, the factory has not encountered an error yet, but if someone has done overhaul it can be.

  24. #24
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    Re: problem in sabroe screw compressor 151

    the compressor reached to 29000 running hour and no person did overhauling for that (not open )

  25. #25
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    Re: problem in sabroe screw compressor 151

    The highest time to open and repair.
    Yacoub, never encountered a problem like you. Yes I know the weakness of the compressor.
    He has processed dozens of such compressors.

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