Valve operation question

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  • deadeye9
    The other deadeye.
    • Jan 2003
    • 323

    #1

    Valve operation question

    I am trying to get an indepth understand of the dynamics of the operation of the valve. It appears to me that when the marker is fired, as the bolt travels foward, the sloped part of the sear assembly is being pressed against the flange at the end of the bolt by the action of the on/off pin pushing against the other end of the sear assembly. As the bolt returns, it pushes against the sloped part which in turn pushes against the on/off pin. There would seem to be alot of friction where the end of the bolt meets the sloped part of the sear assembly. Is this what is happening?
  • Mr.mike
    waffle status=roffled
    • Nov 2003
    • 133

    #2
    the back part of the valve fills with air pushing against the on off pin when you pull the trigger you open the on off pin and release the bolt at same time, air enters bolt pushes it all the way forward and releases out of the bolt pushing the pall forward, then the spring in front of the bolt pushes it back into the original position where the valve fills with air again

    this is what i got from watching the video that came with my mag

    Comment

    • RRfireblade

      • Jun 2002
      • 5103

      #3
      Not quite Mike.

      Air enters the valve,through the reg and fills the dump chamber on the front of the valve.At this time the on/off is open.When you pull the trigger,you 1,shut the on/off and 2,release the bolt.The dump chamber "dumps" as soon as the bolt reaches the end of it's stroke and is then returned by spring pressure.When you release the trigger,you open the on/off and refill the chamber and start over.

      Yes,there is some friction on the sear and bolt on return contact but it is not enough to have any adverse affects.In most cases it's cycling faster than you can release the trigger.

      Jay.
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