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How do I get 4" of wind from a blower at 6.5"

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  • How do I get 4" of wind from a blower at 6.5"



    I have a blower that has a static pressure of 6.5" and I want to have an operating pressure of 4". I added weight to the top but the chest pressure is 6", If i take the weight off itmeasures at about 5 7/8" in the chest. Do i need a dump valve of some sort so that when the resevoir top lifts the valve opens and closes to exhaust extra wind? The top lifts in a few seconds after the blower turns on. Or would 4 compas spings on the top of the resevoir work better?</P>


    Thanks</P>


    Chris</P>


    P.s. I should also mention that I do not have a regulator, but have a curtain valve that is attached to the resevoir which what I have been using as a regulator/resevoir.</P>
    <P mce_keep="true"></P>

  • #2
    Re: How do I get 4&quot; of wind from a blower at 6.5&quot;



    Sounds like you have a bad/leaking curtain valve or some other source of static pressure getting past the valve.</P>

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    • #3
      Re: How do I get 4&quot; of wind from a blower at 6.5&quot;



      You should be able to adjust the curtain valve via a threaded rod protruding from the top of the reservoir. Loosen the nut and change the length of the rod.</P>


      Good luck!</P>

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      • #4
        Re: How do I get 4&quot; of wind from a blower at 6.5&quot;



        Doesn't your resevoir have springs, either internally or externally? Lessen the tension and you will lower the pressure. If you want to have a trem, you'll need to add the weight back to the top to lower the system resonant frequency and control the dynamic stability. Too little weight and it probably won't trem and too much and it will oscillate even with the trem off. As was posted you can adjust the curtain linkage also. The resevoir needs to be about half way between down and max height. Bingo, you have a regulator but we'll just call it a resevoir. []</P>


        Al, A &amp; W (Allen &amp; Whistles)</P>

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        • #5
          Re: How do I get 4&quot; of wind from a blower at 6.5&quot;

          What Al said......YES. If there are other springs take of the tension first before adjusting the curtain valve.

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          • #6
            Re: How do I get 4&quot; of wind from a blower at 6.5&quot;



            One additional point: The blower is designed to blow into a closed system, it's not like a compressor or turbo with a waste gate. You control the pressure by closing the blower output, not venting it. If you run an organ blower with the outlet open to the air, the motor will overheat. Sorry, I forgot that point.</P>


            Al</P>

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            • #7
              Re: How do I get 4&quot; of wind from a blower at 6.5&quot;



              Thanks for your help folks. Part of the problem was the curtain valve and the other part was the top was just weighted with not springs. I got some compass springs from the organ in storage at the church. Seems to be working better and the sound is more stable. Just need to change the winding some. There are only 2 3" wind lines that feed the 73 note principal, and 97 note stp diapason which starts at 16'. The first 12 of the principal are on 2 offsets that sit next to each other and the remainder are on a chest in front of the offsets. The first 12 of the stp diapason is offset on two chests and the first 6 law on their sides and are tubed off the chests. I will try and post better pictures.</P>


              Once again thanks for the help. It's nice to know there is someone to help.</P>

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