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Thread: Dump Valve for 11/16 Bodies

  1. #1
    Join Date
    Sep 2017
    Posts
    2

    Dump Valve for 11/16 Bodies

    Hello all.

    I am slowly working on a project and have been trying to find a valve for it. My Google-fu turned up the Alien Morph Valve as a possible candidate, so I bought one and I'm not 100% sure whether or not it will fit the bill.

    What I am looking for is a valve that closes off its input when the hammer strikes and opens its output, allowing for some pneumatic 'logic' circuits on the front block. I think what I'm trying to do is called a FASOR, unless I can find a four way that toggles as a pilot valve.

    Does this exist and I'm just not finding it, or am I chasing a pipe dream here?

    Thanks!

  2. #2
    Join Date
    Nov 2012
    Location
    Sidney, OH
    Posts
    2,307
    Quote Originally Posted by kapyrna View Post
    Hello all.

    I am slowly working on a project and have been trying to find a valve for it. My Google-fu turned up the Alien Morph Valve as a possible candidate, so I bought one and I'm not 100% sure whether or not it will fit the bill.

    What I am looking for is a valve that closes off its input when the hammer strikes and opens its output, allowing for some pneumatic 'logic' circuits on the front block. I think what I'm trying to do is called a FASOR, unless I can find a four way that toggles as a pilot valve.

    Does this exist and I'm just not finding it, or am I chasing a pipe dream here?

    Thanks!
    A fasor is forward air spring operated return. So thats not what your looking for. I think u may be looking for a valve with a hall effect. Idk if if you shpuld even shut off input given the limited volume in front of the valve. Maybe a merlin spec may be able to
    Last edited by Vitalsilence; 10-12-2017 at 06:53 AM.
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  3. #3
    Join Date
    Sep 2017
    Posts
    2
    My goal, if this makes sense:

    • Hammer is cocked back, bolt is forward, valve's input is open and output is closed
    • Trigger is pulled and releases the hammer
    • Hammer strikes valve pin, and closes input and opens output up into the bolt
    • Valve dumps pressure up and out the danger-end of the bolt
    • Valve is now 'empty', and no longer provides pressure to a pilot valve that takes the place of the timing rod and three-way
    • Pilot valve toggles the ram's feed to do the pumping action rearward to recock the hammer
    • Hammer lets off the valve, opening the input and closing the output
    • Valve repressurises, reapplying pressure to the pilot valve for the ram
    • Pilot valve toggles the ram 'forward' to put the bolt forward again
    • Marker is ready to fire, repeat as necessary


    Ram could be either sprung rearward or pressurised rearward via the pilot valve, but I figure it wouldn't be good to directly use the core pressure to keep the bolt forward. I do foresee that the valve volume could pose issues as there is limited space in standard lower tubes.

  4. #4
    Join Date
    Jul 2015
    Posts
    49
    sounds like an interesting idea if I'm understanding it correctly. I wonder if you could do it with a custom cup seal that had a rod that extends past the valve spring and when open seals off the air input from the reg. you'd need a small tube inserted into the back of the valve chamber to keep the spring out of the way but it might work, you just need to come up with a way to increase the air volume like Vitalsilence said.


  5. #5
    Join Date
    Mar 2007
    Location
    Medford, OR
    Posts
    2,737
    Simon's forums (Inception Designs). Would be a great place to ask that question. Lots of knowledge base over there on pnumatic design:

    https://inceptionforums.com/

  6. #6
    Join Date
    Jan 2009
    Location
    Guatemala
    Posts
    298
    Sounds close to a shoebox shocker except for the single valve/pilot assy.:
    Last edited by timekeepes; 12-06-2017 at 11:23 PM.

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