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Huma Reg Advice Needed Please.

Discussion in 'Technical' started by Meater, Oct 3, 2019.

  1. Meater

    Meater Donator

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    I've jus fitted a new Huma to my Daystate Tsar. The issue is that; when filled to 200 bar I get about 10.5 ftlb, but when it gets down to about 150 bar or so it goes up to 11.5 until it goes off the reg. is this normal? or is there something I can do to level it out. When I refill to 200 bar it goes back down again. The reg's set to 95 as it came fro XTX.
     
  2. john79

    john79 Keyboard Hero

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    your regs not sealing properly by the sound of it!
     
  3. john79

    john79 Keyboard Hero

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    have you fitted it the right way round:confused:
     
    billy.whizz and hmangphilly like this.
  4. Meater

    Meater Donator

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    Surely if it wasn’t sealing there”d be a leak. I’ll check it tomorrow.
     
  5. john79

    john79 Keyboard Hero

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    hope it easily sorted matey
     
  6. hmangphilly

    hmangphilly Busy Member

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    :facepalm:
     
    Artie and billy.whizz like this.
  7. Bozz

    Bozz Engaging Member

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    Hi there did the regulator come with a new pair of springs to close the exhaust valve as the pressure behind it is less. My one from Robert Lane came with new springs to address this problem. All the best Graham.
     
    Blackmax likes this.
  8. sharpsman

    sharpsman Posting Addict

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    sounds like its self regulating ,ie the reg is not working properly.
     
  9. RichieRich

    RichieRich Pew Pew

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    Sounds faulty, it should have the same output throughout the pressure range until the high pressure side drops below the value the regulator is set to.

    Drop Huma an email and they should be able to help you
     
    Blackmax and billy.whizz like this.
  10. Meater

    Meater Donator

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    Cheers all, I got it from XTX so I'll email them first then Huma if I don't get the answer.

    The reg came without extra springs
     
  11. Wewekokowe

    Wewekokowe Engaging Member

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    deleted, waste of time
     
    Last edited: Oct 7, 2019
  12. Wewekokowe

    Wewekokowe Engaging Member

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    No he can not increase the hst alone as that would add to the fps especially at the low end of the fill. That end is already ok.
     
    Last edited: Oct 4, 2019
  13. Lavant_Lad

    Lavant_Lad Well-Known Member

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    Had the same problems with my Tsar/Huma never really sorted it, sold the rifle glad to see the back of it.
    Good luck with yours.
     
  14. Meater

    Meater Donator

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    Thanks for this, If I'm understanding this right, Darrin from XTX has said pretty much the same. I can adjust the reg to 70 Bar and then adjust the HST accordingly. this was his reply, makes sense, as does your post.

    "Hi Ian,

    The most requested pressure for the sub 12ftlbs Ataman/Tsar regulators is around 70-80bar, so it may be worth turning your regulator pressure down and try again.

    Normally the power rising as the pressure drops, like yours, is down to too much pre-load on the hammer spring. You will probably find the power will go up considerably when you reduce the regulator pressure, which means you will need less pre-load on the hammer spring.

    Let me know how you get on.

    Regards,
    Darrin Lynn"
     
  15. Wewekokowe

    Wewekokowe Engaging Member

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    Last edited: Oct 7, 2019
    Blackmax likes this.
  16. robs5230

    robs5230 леший

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    You think you know better than the maker of the reg ?

    If Huma haven't made any recommendations of other hammer springs or changes to TP diameter, its either HST settings in the first instance to try, failing that, reg pressures AND HST settings.
    Pehaps you need to email Huma and share your wisdom with them.
     
  17. Wewekokowe

    Wewekokowe Engaging Member

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    Last edited: Oct 7, 2019
    Blackmax likes this.
  18. sharpsman

    sharpsman Posting Addict

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    What sort of power is it making closer to the reg set pressure , ie is it climbing up as the pressure drops down to say 100 bar ish
     
  19. Meater

    Meater Donator

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    To be honest I'm not sure, before it got there it was bordering on illegal limits so I lowered HST, not realising it would go back down again when I refilled it.
     
  20. sharpsman

    sharpsman Posting Addict

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    whats it like now then ?
     

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